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Sample records for aerospatiale matra lanceurs

  1. Involvement of Aerospatiale Matra Lanceurs (AML) in the Exploration of Mars

    NASA Astrophysics Data System (ADS)

    Berthe, Ph.; Bonnefond, Francine

    2000-07-01

    The goal of this paper is to present to the workshop participants the Aerospatiale Matra Lanceurs company and its activities in the field of Mars exploration. Aerospatiale Matra Lanceurs (AML) is a subsidiary of the EADS ("EADS in formation") group. This company has all the expertise required to develop strategic missiles, space launchers, orbital transfer vehicles, re-entry vehicles and equipment for space research and interplanetary exploration. Therefore, it can provide useful information and answers to the "how" and "when" questions in this workshop: AML is the Industrial Architect for Ariane 4 and for all the different, present and future versions of Ariane 5. It has built the thermal protection system of the Huygens Titan Probe which is carried by Cassini. In addition to the thermal protection production, Aerospatiale Matra Lanceurs has also performed all the studies linked to the entry and descent system, including the aerodynamic studies, trajectories, heat and radiation flux in an atmosphere, the one of Titan, different from ours. AML has also been the prime contractor of the Atmospheric Reentry Demonstrator (ARD), launched by Ariane 5, which flew flawlessly in October 1998. Due to its prominent role in Europe, Aerospatiale Matra Lanceurs is now playing an important part in the present and future French and European endeavors regarding the exploration of Mars. For some elements, such as Beagle-2, the involvement of Aerospatiale Matra Lanceurs has already been decided, for some others, this is still a competitive process.

  2. Training at Aerospatiale

    NASA Astrophysics Data System (ADS)

    Chabod, Rene

    A training plan for Aerospatiale is outlined which incorporates goals for both the organization and the individual. Emphasis is placed on the training of staff in multiple skills such as mechanics/electronics. Other areas considered include the development of information tools, the development of commercial approaches, and the learning of new industrial techniques and foreign languages.

  3. Industrial Applications Of Holography In Aerospatiale

    NASA Astrophysics Data System (ADS)

    Le Floc'H, C.; Gagnage, B.

    1982-10-01

    AEROSPAT1ALE occupies a leading position in the European aerospace industry. Its industrial potential is exemplified by : - Its 4 divisions : Aircraft, Helicopters, Tactical Missiles and Space and Balistic Systems. - Its 11 factories. - Its 6 subsidiaries. The vitality of the firm can be demonstrated by a few figures : - Turnover (fiscal 1980 without the subsidiaries), 13, 169 millions French Francs. - Exports (in 1980), 48,2%. - Workforce (on 31st December 1980), 38,857 of whom 3,919 were with the subsidiaries. Among Aerospatiale products, we can quote : - Ariane. - Airbus. - Super Puma, Astar, Dauphin. - Tactical Missiles AS 15, AS 30, AM 59. - Satellites Meteostat, Intelsat V and Exosat. Certain projects were carried out in multi-national cooperation. These high-performance, high-reliability products presuppose the implementation of advanced technology. Hence, in order to maintain their standard, we use non-destructive testing thechniques such as X-rays or ultrasonics which have given complete satisfaction in the detection of flaws. However, to reduce the inspection contribution to the cost price of our products, we were led to develop new, large-scale methods, such as acoustic analysis and holographic interferometry. This paper covers the uses of holography in an industrial environment. We shall discuss the technical advantages of the method, illustrated by several examples,and the economical advantages, demonstrated by the practical example of an inspection line. Finally for the enhancement of Aerospatiale's technology (new materials, and holographic inspection) we will go on to outline other fields of activity.

  4. An Overview on Aerospatiale Magnetic Bearing Products for Spacecraft Attitude Control and for Industry

    NASA Technical Reports Server (NTRS)

    Samuel, Alain; Lechable, Bernard

    1996-01-01

    Aerospatiale magnetic bearings are based on the use of permanent magnets and on the control of the rotor around a zero force equilibrium point. The present developments of magnetic bearing wheels for space applications focus on the versatility of a basic design which leads to a family of reaction and momentum wheels with tailored torque and kinetic momentum, leading to competitive mass and cost. The present industrial applications concern kinetic energy accumulators, medical x-ray rotating devices, avionics equipment, cryotechnic compressors and vacuum pumps.

  5. The prediction of the noise generating mechanisms of an Aerospatiale 365N-1 Dauphin helicopter

    NASA Technical Reports Server (NTRS)

    Weir, Donald S.; Golub, Robert A.

    1989-01-01

    The National Aeronautics and Space Administration (NASA) is engaged in a joint program with the U.S. helicopter industry to develop a full system helicopter noise prediction computer program called ROTONET. The long term goal of the system is to achieve the ability to predict a helicopter noise signature from the basic input of helicopter geometry and operating condition data. It is being developed in phases, with each phase representing an increase in sophistication. NASA is also performing a series of flight tests to provide a validation data base for the ROTONET System. A joint NASA/U.S. Army test of an Aerospatiale 365N-1 Dauphin helicopter is an element of the series. A comprehensive data base of spectra, noise level time histories, and effective perceived noise levels, incorporating actual meteorological conditions and helicopter dynamics, was produced from this test. Comparisons are made of predictions of the individual source generating mechanisms from the ROTONET System with data from the Aerospatiale 365N-1 Dauphin flyover test. EPNL and noise level time history comparisons demonstrate the overall capabilities of the prediction system. Graphs of 1/3 octave band noise spectra of experimental data and prediction allow identification of the dominant noise prediction mechanisms for various frequencies, directivity angles, and operating conditions.

  6. A comparative study of Dashamoola Taila Matra Basti and Tila Taila Matra Basti in Kashtartava (dysmenorrhea)

    PubMed Central

    Karunagoda, Kaumadi; Shukla (Upadhyaya), Kamayani; Donga, Shilpa; Tanna, Chandrika; Dei, L. P.

    2010-01-01

    Kashtartava is a broad term which covers all the problems and ailments that a woman may suffer from during or around menstruation. It includes both primary and secondary types of dysmenorrhea. For this study, however, we considered only primary dysmenorrhea under the term Kashtartava to cover a larger population and to make a pin-pointed assessment criteria. Thus, 40 patients in the age-group of 15–25 years suffering from primary dysmenorrhea were registered for the study. Of these patients, 35 completed the course of treatment. The selected patients were randomly allotted into two groups. Group A received Dashamoola Taila Matra Basti and group B received Tila Taila Matra Basti. These treatments were selected for the Vatashamaka, Yonishula Prashaman, and Shothahara properties of the drugs. The dose was 60 ml per day and the duration of treatment was for 7 days each cycle for two consecutive cycles. Results were assessed according to a specially prepared grading system for pain, Alpartava, Yatochitkaladarshana, Praseka, Chhardi, Vibandha, Shrama, Atisara, Vankshana, Kati, Janu Shula, Shiroshula, Swedadhikya, and Tamodarshana. Significant improvement was seen in symptoms in both groups, and on comparing the results in the two groups we found that the results were almost equivalent. There was complete remission of symptoms in 38.89% in group A and in 35.39% in group B, while there was marked improvement in 50% in group A and 47.65% in group B. However, there was a marked difference between the two groups with regard to recurrence of symptoms during the follow-up period of 2 months, with recurrence being significantly more in group B. The study suggests that Matra Basti can be a reliable treatment for relieving the symptoms of primary dysmenorrhea. We recommend that more research be done to confirm the findings of this study. PMID:22131731

  7. A comparative study of Dashamoola Taila Matra Basti and Tila Taila Matra Basti in Kashtartava (dysmenorrhea).

    PubMed

    Karunagoda, Kaumadi; Shukla Upadhyaya, Kamayani; Donga, Shilpa; Tanna, Chandrika; Dei, L P

    2010-07-01

    Kashtartava is a broad term which covers all the problems and ailments that a woman may suffer from during or around menstruation. It includes both primary and secondary types of dysmenorrhea. For this study, however, we considered only primary dysmenorrhea under the term Kashtartava to cover a larger population and to make a pin-pointed assessment criteria. Thus, 40 patients in the age-group of 15-25 years suffering from primary dysmenorrhea were registered for the study. Of these patients, 35 completed the course of treatment. The selected patients were randomly allotted into two groups. Group A received Dashamoola Taila Matra Basti and group B received Tila Taila Matra Basti. These treatments were selected for the Vatashamaka, Yonishula Prashaman, and Shothahara properties of the drugs. The dose was 60 ml per day and the duration of treatment was for 7 days each cycle for two consecutive cycles. Results were assessed according to a specially prepared grading system for pain, Alpartava, Yatochitkaladarshana, Praseka, Chhardi, Vibandha, Shrama, Atisara, Vankshana, Kati, Janu Shula, Shiroshula, Swedadhikya, and Tamodarshana. Significant improvement was seen in symptoms in both groups, and on comparing the results in the two groups we found that the results were almost equivalent. There was complete remission of symptoms in 38.89% in group A and in 35.39% in group B, while there was marked improvement in 50% in group A and 47.65% in group B. However, there was a marked difference between the two groups with regard to recurrence of symptoms during the follow-up period of 2 months, with recurrence being significantly more in group B. The study suggests that Matra Basti can be a reliable treatment for relieving the symptoms of primary dysmenorrhea. We recommend that more research be done to confirm the findings of this study. PMID:22131731

  8. Flipper, The Matra Groundstation For The CL289 UAV

    NASA Astrophysics Data System (ADS)

    Devambez, F.; Demathieu, P.

    1989-02-01

    This paper describes the French groundstation for the CL289 UAV, alias AN/USD 502. The main feature of the MATRA groundstation is an original concert based on both hard-copy and softcopy, where detection is made on film in real time, while internretation is performed on digital data images.

  9. Concept of Ahara in relation to Matra, Desha, Kala and their effect on Health.

    PubMed

    Dangayach, Rohit; Vyas, Mahesh; Dwivedi, R R

    2010-01-01

    For evaluation of the effect of Ahara on Health in relation to Matra, Desha and Kala, an interview based survey study was carried out by simple randomized selection of healthy and unhealthy individuals. It was found that consideraton of Matra, Desha and Kala in aspect of Ahara taking were found beneficial for health. PMID:22131693

  10. Concept of Ahara in relation to Matra, Desha, Kala and their effect on Health

    PubMed Central

    Dangayach, Rohit; Vyas, Mahesh; Dwivedi, R. R.

    2010-01-01

    For evaluation of the effect of Ahara on Health in relation to Matra, Desha and Kala, an interview based survey study was carried out by simple randomized selection of healthy and unhealthy individuals. It was found that consideraton of Matra, Desha and Kala in aspect of Ahara taking were found beneficial for health. PMID:22131693

  11. Role of Nasya and Matra Basti with Narayana Taila on anovulatory factor.

    PubMed

    Donga, Krupa R; Donga, Shilpa B; Dei, Laxmi Priya

    2013-01-01

    Description of Vandhyatva is available in most of the Ayurvedic classics, including Nidana (diagnosis), Samprapti (etiopathogenesis), Lakshana (symptomatology), Bheda (types) and Chikitsa (treatment). In current study, efforts have been made to study the effect of Nasya and Matra Basti on anovulation (Beeja Dushti). Ovulation is under the control of Vata. Narayana Taila is attributed for its effect in Vandhyatva. 24 patients of female infertility having anovulatory factor, being diagnosed by Trans-Vaginal Sonography (TVS) for 2 consecutive cycles were divided in two groups. Patients in Group A (n = 12) administered the drug through Nasya and in Group B (n = 12) through Matra Basti. Ovulation occurred 36.36% of patients in group A and 66.16% of patients group B. Matra Basti showed better results than Nasya group on anovulation. PMID:24049410

  12. Role of Nasya and Matra Basti with Narayana Taila on anovulatory factor

    PubMed Central

    Donga, Krupa R.; Donga, Shilpa B.; Dei, Laxmi Priya

    2013-01-01

    Description of Vandhyatva is available in most of the Ayurvedic classics, including Nidana (diagnosis), Samprapti (etiopathogenesis), Lakshana (symptomatology), Bheda (types) and Chikitsa (treatment). In current study, efforts have been made to study the effect of Nasya and Matra Basti on anovulation (Beeja Dushti). Ovulation is under the control of Vata. Narayana Taila is attributed for its effect in Vandhyatva. 24 patients of female infertility having anovulatory factor, being diagnosed by Trans-Vaginal Sonography (TVS) for 2 consecutive cycles were divided in two groups. Patients in Group A (n = 12) administered the drug through Nasya and in Group B (n = 12) through Matra Basti. Ovulation occurred 36.36% of patients in group A and 66.16% of patients group B. Matra Basti showed better results than Nasya group on anovulation. PMID:24049410

  13. Effect of Shatapushpa Taila Matra Basti and Pathadi Kwatha on Poly Cystic Ovarian Disease

    PubMed Central

    Patel, Krupa D.; Dei, Laxmipriya; Donga, Shilpa B.; Anand, Nalini

    2012-01-01

    Poly Cystic Ovarian Disease (PCOD) is a complex disorder affecting 5-15% women in their reproductive age and related to ovarian dysfunction, characterized by menstrual irregularities, hyperandrogonism, obesity, and infertility. In Ayurveda, these symptoms are found under various conditions, caused by vitiated Vata and Kapha. Pathadi Kwatha and Shatapushpa Taila Matra Basti were studied in the current attempt to evaluate their comparative efficacy in cases of PCOD. Total 34 patients of PCOD were registered among which, 32 had completed the treatment of 2 months. They were randomly divided in to three groups. In group A Pathadi Kwatha (10 g, bid) and Shatapushpa Taila Matra Basti (60 ml for 7 days after cessation of menses for 2 consecutive cycles) were administered. In group B only Basti, whereas in group C capsules of roosted wheat flour were administered. Better results were obtained in group A especially in menstrual irregularities, achieving follicular growth and in weight reduction. PMID:23559797

  14. Effect of shatapushpa taila matra basti and pathadi kwatha on poly cystic ovarian disease.

    PubMed

    Patel, Krupa D; Dei, Laxmipriya; Donga, Shilpa B; Anand, Nalini

    2012-04-01

    Poly Cystic Ovarian Disease (PCOD) is a complex disorder affecting 5-15% women in their reproductive age and related to ovarian dysfunction, characterized by menstrual irregularities, hyperandrogonism, obesity, and infertility. In Ayurveda, these symptoms are found under various conditions, caused by vitiated Vata and Kapha. Pathadi Kwatha and Shatapushpa Taila Matra Basti were studied in the current attempt to evaluate their comparative efficacy in cases of PCOD. Total 34 patients of PCOD were registered among which, 32 had completed the treatment of 2 months. They were randomly divided in to three groups. In group A Pathadi Kwatha (10 g, bid) and Shatapushpa Taila Matra Basti (60 ml for 7 days after cessation of menses for 2 consecutive cycles) were administered. In group B only Basti, whereas in group C capsules of roosted wheat flour were administered. Better results were obtained in group A especially in menstrual irregularities, achieving follicular growth and in weight reduction. PMID:23559797

  15. Efficacy of Kanchanara Guggulu and Matra Basti of Dhanyaka Gokshura Ghrita in Mootraghata (benign prostatic hyperplasia)

    PubMed Central

    Patel, Joyal Kumar K.; Dudhamal, Tukaram S.; Gupta, Sanjay Kumar; Mahanta, Vyasadeva

    2015-01-01

    Background: Benign prostatic hyperplasia (BPH), a senile disorder affects male of and above 40 years characterized by retention, incomplete voiding, dribbling, hesitancy, and incontinence of urine. This condition is comparable with Mootraghata in Ayurveda. Surgical intervention has been accepted as standard management, but has acute cystitis, acute epididymitis, erectile dysfunction, retrograde ejaculation, etc. as complications. Conservative treatment with modern medicine is also associated with side effects. Hence, to avoid such complications and improve the quality of life in senile age, conservative management with Ayurveda is attempted. Aim: To evaluate clinical efficacy of Kanchanara Guggulu and Dhanyaka Gokshura Ghrita Matra Basti in Mootraghata. Materials and Methods: Total 30 patients having signs and symptoms of BPH were selected from OPD and IPD of Shalya Tantra and enrolled equally into three groups (n = 10). Patients of Group A were administered with Kanchanara Guggulu (500 mg, 3 times a day orally), Group B were with Dhanyaka Gokshura Ghrita Matra Basti, while patients of Group C were administered both the drugs for 21 days. International prostate symptom score (IPSS) was used to assess the efficacy. paired and unpaired “t” test, Chi-square test were applied for significance. Results: In IPSS, Group B had shown the better results (84.27%) than the Group A (72.68%) and Group C (82.10%). In all objective parameters, Group C had shown better effect (23.60%) than Group A (15.70%) and Group B (18.24%). Symptomatic relief was better in Group B than Groups A and C. Comparison between three groups on objective parameters was better in Group C than in Group A and B. Conclusion: Kanchanara Guggulu orally and Dhanyaka Gokshura Ghrita Matra Basti is effective conservative management for symptomatic relief in BPH of senile age. PMID:27011713

  16. Clinical effect of Matra Basti and Vatari Guggulu in the management of Amavata (rheumatoid arthritis)

    PubMed Central

    Khagram, Rita; Mehta, Charmi S.; Shukla, V. D.; Dave, Alankruta R.

    2010-01-01

    Amavata is the most crippling of the joint diseases. It occurs throughout the world in all climates and all ethnic groups. Though all the Doshas take part in the causation of this disease, Ama and vitiated Vata play the dominant role. The clinical features of rheumatoid arthritis, such as pain, swelling, stiffness, fever, and general debility, are almost identical to that of Amavata. Treatment provides symptomatic relief, but the underlying pathology remains unchecked because of the absence of effective drugs. In the management of Amavata all the acharyas have described the sequential employment of Dipana, Amapachan, Shodhan, and Shaman therapies. For this study, 118 patients of Amavata were randomly divided into two groups. The patients in group A (50 patients) were given Matra Basti with Brihat Saindhavadi Taila along with Vatari Guggulu; the patients in group B (53 patients) were given only Vatari Guggulu. All the patients responded favorably to the treatment in both the groups; however, patients treated with Matra Basti had better relief in most of the cardinal signs and symptoms of the disease. PMID:22131737

  17. Clinical effect of Matra Basti and Vatari Guggulu in the management of Amavata (rheumatoid arthritis).

    PubMed

    Khagram, Rita; Mehta, Charmi S; Shukla, V D; Dave, Alankruta R

    2010-07-01

    Amavata is the most crippling of the joint diseases. It occurs throughout the world in all climates and all ethnic groups. Though all the Doshas take part in the causation of this disease, Ama and vitiated Vata play the dominant role. The clinical features of rheumatoid arthritis, such as pain, swelling, stiffness, fever, and general debility, are almost identical to that of Amavata. Treatment provides symptomatic relief, but the underlying pathology remains unchecked because of the absence of effective drugs. In the management of Amavata all the acharyas have described the sequential employment of Dipana, Amapachan, Shodhan, and Shaman therapies. For this study, 118 patients of Amavata were randomly divided into two groups. The patients in group A (50 patients) were given Matra Basti with Brihat Saindhavadi Taila along with Vatari Guggulu; the patients in group B (53 patients) were given only Vatari Guggulu. All the patients responded favorably to the treatment in both the groups; however, patients treated with Matra Basti had better relief in most of the cardinal signs and symptoms of the disease. PMID:22131737

  18. MATra - Magnet Assisted Transfection: combining nanotechnology and magnetic forces to improve intracellular delivery of nucleic acids.

    PubMed

    Bertram, J

    2006-08-01

    Recent efforts combining nanotechnology and magnetic properties resulted in the development and commercialization of magnetic nanoparticles that can be used as carriers for nucleic acids for in vitro transfection and for gene therapy approaches including DNA-based vaccination strategies. The efficiency of intracellular delivery is still a limiting factor for basic cell biological research and also for emerging technologies such as temporary gene silencing based on inhibitory RNA/siRNA. Nanotechnology has resulted in a variety of different nanostructures and especially nanoparticles as carriers in a wide range of new drug delivery systems for conventional drugs, recombinant proteins, vaccines and more recently nucleic acids. It is possible to combine superparamagnetic nanoparticles with magnetic forces to increase, direct and optimize intracellular delivery of biomolecules. This article discusses the main approaches in the field of magnet assisted transfection (MATra) focusing on the transfection or intracellular delivery of nucleic acids, although also suitable to improve the intracellular delivery of other biomolecules. PMID:16918404

  19. A Clinical study of Matra Vasti and an ayurvedic indigenous compound drug in the management of Sandhigatavata (Osteoarthritis).

    PubMed

    Shah, Mayuri R; Mehta, Charmi S; Shukla, V D; Dave, Alankruta R; Bhatt, N N

    2010-04-01

    Sandhigatavata is described under vatavyadhi in all ayurvedic classical texts. Osteoarthritis is the most common articular disorder which begins asymptomatically in the second and third decades and is extremely common by age 70. Here Matra Vasti (therapeutic enema) was given with Bala taila as Vasti is the best treatment for vatavyadhies. It has vatashamaka and rasayana properties. Indigenous compound drug containing Guggulu, Shallaki, Yastimadhu, Pippali, Guduchi, Nirgundi, Kupilu and Godanti was given in one group along with Matra Vasti. In this study, 33 patients of Sandhigatavata completed the treatment. Patients were randomly divided into two groups. Sixteen patients in Group-A (sarvanga Abhyanga-swedana + matravasti) and 17 patients in Group-B (sarvanga Abhyanga-swedana+ matravasti + indigenous compound drug). The results of the study indicate that the patients of both the groups obtained highly significant relief in almost all the signs and symptoms of Sandhigatavata. PMID:22131712

  20. A Clinical study of Matra Vasti and an ayurvedic indigenous compound drug in the management of Sandhigatavata (Osteoarthritis)

    PubMed Central

    Shah, Mayuri R.; Mehta, Charmi S.; Shukla, V. D.; Dave, Alankruta R.; Bhatt, N. N.

    2010-01-01

    Sandhigatavata is described under vatavyadhi in all ayurvedic classical texts. Osteoarthritis is the most common articular disorder which begins asymptomatically in the second and third decades and is extremely common by age 70. Here Matra Vasti (therapeutic enema) was given with Bala taila as Vasti is the best treatment for vatavyadhies. It has vatashamaka and rasayana properties. Indigenous compound drug containing Guggulu, Shallaki, Yastimadhu, Pippali, Guduchi, Nirgundi, Kupilu and Godanti was given in one group along with Matra Vasti. In this study, 33 patients of Sandhigatavata completed the treatment. Patients were randomly divided into two groups. Sixteen patients in Group-A (sarvanga Abhyanga-swedana + matravasti) and 17 patients in Group-B (sarvanga Abhyanga–swedana+ matravasti + indigenous compound drug). The results of the study indicate that the patients of both the groups obtained highly significant relief in almost all the signs and symptoms of Sandhigatavata. PMID:22131712

  1. A clinical study of Nirgundi Ghana Vati and Matra Basti in the management of Gridhrasi with special reference to sciatica.

    PubMed

    Ali, Mumtaz; Shukla, V D; Dave, A R; Bhatt, N N

    2010-10-01

    Gridhrasi can be equated with sciatica, where pain, weakness, numbness, and other discomforts along the path of the sciatic nerve often accompanies low back pain. It is a common affliction of adults, costing billions of dollars in healthcare and resulting in more lost days of work than any other illness but the common cold. A herniated disc, spinal stenosis, piriformis syndrome, etc., can all cause sciatica. The treatment available for sciatica in modern medicine is not very satisfactory.The role of research in Ayurveda is to elucidate the underlying principles and to explain them in modern parameters. The present study was aimed at establishing clinically the effect of Nirgundi (Vitex negundo) Ghan Vati (dried water extract) alone as well as in combination with Matra Basti in the management of Gridhrasi. A total of 119 patients were registered for the study, out of which 102 patients completed the treatment: 52 patients in group A (Nirgundi Ghan Vati) and 50 in group B (Nirgundi Ghan Vati + Matra Basti). The results show that both treatments had an effect on Gridhrasi, but there was better relief of the signs and symptoms in group B. Matra Basti and Nirgundi Ghan Vati might both contribute to different extents in the recovery of the patient. PMID:22048539

  2. A clinical study of Nirgundi Ghana Vati and Matra Basti in the management of Gridhrasi with special reference to sciatica

    PubMed Central

    Ali, Mumtaz; Shukla, V. D.; Dave, A. R.; Bhatt, N. N.

    2010-01-01

    Gridhrasi can be equated with sciatica, where pain, weakness, numbness, and other discomforts along the path of the sciatic nerve often accompanies low back pain. It is a common affliction of adults, costing billions of dollars in healthcare and resulting in more lost days of work than any other illness but the common cold. A herniated disc, spinal stenosis, piriformis syndrome, etc., can all cause sciatica. The treatment available for sciatica in modern medicine is not very satisfactory.The role of research in Ayurveda is to elucidate the underlying principles and to explain them in modern parameters. The present study was aimed at establishing clinically the effect of Nirgundi (Vitex negundo) Ghan Vati (dried water extract) alone as well as in combination with Matra Basti in the management of Gridhrasi. A total of 119 patients were registered for the study, out of which 102 patients completed the treatment: 52 patients in group A (Nirgundi Ghan Vati) and 50 in group B (Nirgundi Ghan Vati + Matra Basti). The results show that both treatments had an effect on Gridhrasi, but there was better relief of the signs and symptoms in group B. Matra Basti and Nirgundi Ghan Vati might both contribute to different extents in the recovery of the patient. PMID:22048539

  3. Aerospatiale industrial thermal plasma activities

    NASA Astrophysics Data System (ADS)

    Labrot, Maxime

    Details of nontransferred arc torches, plasma systems in industrial use and operational plasma applications are listed. A plasma application on a foundry cupola is detailed. The setting up of a plasma system is described. Research and development activities are summarized.

  4. Gokshuradi Vati and Dhanyaka-Gokshura Ghrita Matra Basti in the management of Benign Prostatic Hyperplasia.

    PubMed

    Bhalodia, Shreyas G; Bhuyan, Chaturbhuj; Gupta, Sanjay Kumar; Dudhamal, Tukaram S

    2012-10-01

    Benign Prostatic Hyperplasia (BPH) is a burning senile problem of elderly men and no definitive conservative cure is available. The present available surgical and minimal invasive methods have their own limitations. Hence, to find out a suitable Ayurvedic approach, an effort has been made towards the management of BPH, In this study, 32 selected patients of Mootraghata at par to BPH were divided into three groups randomly and treated accordingly. In group A, Gokshuradi compound (GC) Vati (GV) 500 mg was given three times a day with luke-warm water after food; while in group B, Dhanyaka-Gokshura Ghrita (DGG) as Matra Basti (MB) of 60 ml, once in a day, just after lunch and combined therapy of both formulations in group C was administered. Out of 32 patients, total 30 patients (10 in each group) were completed the treatment course of 21 days. In results, 54.09% improvement was seen in group C, 45.67% in group A and 47.99% in group B. The size of prostate gland was found reduced highly significant in group C. Hence, it is concluded that combined therapy of GV and DGG MB is beneficial without developing any adverse drug reactions and can be prescribed safely for Mootraghata (BPH). PMID:23723674

  5. Gokshuradi Vati and Dhanyaka-Gokshura Ghrita Matra Basti in the management of Benign Prostatic Hyperplasia

    PubMed Central

    Bhalodia, Shreyas G.; Bhuyan, Chaturbhuj; Gupta, Sanjay Kumar; Dudhamal, Tukaram S.

    2012-01-01

    Benign Prostatic Hyperplasia (BPH) is a burning senile problem of elderly men and no definitive conservative cure is available. The present available surgical and minimal invasive methods have their own limitations. Hence, to find out a suitable Ayurvedic approach, an effort has been made towards the management of BPH, In this study, 32 selected patients of Mootraghata at par to BPH were divided into three groups randomly and treated accordingly. In group A, Gokshuradi compound (GC) Vati (GV) 500 mg was given three times a day with luke-warm water after food; while in group B, Dhanyaka-Gokshura Ghrita (DGG) as Matra Basti (MB) of 60 ml, once in a day, just after lunch and combined therapy of both formulations in group C was administered. Out of 32 patients, total 30 patients (10 in each group) were completed the treatment course of 21 days. In results, 54.09% improvement was seen in group C, 45.67% in group A and 47.99% in group B. The size of prostate gland was found reduced highly significant in group C. Hence, it is concluded that combined therapy of GV and DGG MB is beneficial without developing any adverse drug reactions and can be prescribed safely for Mootraghata (BPH). PMID:23723674

  6. PA03.07. A clinical comparative study of Matra Vasti and Vaitran Vasti in the treatment of Gridhrasi w.s.r to Sciatica

    PubMed Central

    Gupta, Charu; Chaudhary, Arvind

    2013-01-01

    Purpose: Sciatica is a vata dominant vikar and vasti is a vata dominant chikitsa. Matra Vasti is a nirapad vasti and can be given in any condition without following the ahara and vihara, then what is need for Vaitran Vasti? So, here an effort was made to study the effect of Matra vasti and Vaitran Vasti separately in the treatment of Grihdrasi. Method: 30 patients were randomly selected from the OPD and IPD of Kayachikitsa Department of Ayurvedic Medical College,Davanagere, Karnataka and were separated in two groups of 15 each,and a study was conducted. Along with vasti chikitsa oral medication was also given. Ekangvir rasa in the dose of 500mg B.D and Lashunadi vati in the dose of 2 tabs. B.D. Result: Results were evaluated on the basis of symptoms of types of Gridhrasi i.e vataja and vatakaphaja as mentioned in Charak Samhita which showed marked improvement in all the symptoms. A Ttest was performed which gave a significant result of (P<.001). Results were also seen on the basis of International Scale which resulted in improvement in functional ability and reduction in functional disability. Conclusion: It can be said that Vasti plays an important role in the treatment of Grihdrasi. In Vataja type Matra Vasti had played an supreme role as it helps in treating degenerative pathology and in Vatakaphaja type Vaitran Vasti had played a first rate role as it helps in treating inflammatory pathology.

  7. Obstacle detection and warning system for aircraft navigation at airports

    NASA Astrophysics Data System (ADS)

    Gallo, Laurent

    2000-06-01

    This paper speaks about work conducted in 1998 and 1999 by AEROSPATIALE MATRA in development of an obstacle detection system, which has been tested on a demonstrator aircraft in Toulouse. The purpose of this mock- up was to verify the feasibility of a passive technology, and to consider the limits of its use.

  8. Open-ended tools for IR sensors, scenes, and systems design

    NASA Astrophysics Data System (ADS)

    Gallo, Laurent; Barrat, Benoit; Berthier, Sylvain; Cambou, Nicole; Schalow, G.

    2000-12-01

    AEROSPATIALE MATRA MISSILES has been involved in sensors, scenes and systems simulation for more than 10 years. These simulations are mainly used for missile guidance or target detection and tracking. They have been improved continuously and have become more and more realistic. They are now essential tools for the development and qualification of complex systems. This paper presents the evolutions of simulations through different examples (air-to-ground missile with IR terminal guidance and optronic firing post).

  9. Active control system for a rotor blade trailing-edge flap

    NASA Astrophysics Data System (ADS)

    Duvernier, Marc; Reithler, Livier; Guerrero, Jean Y.; Rossi, Rinaldo A.

    2000-06-01

    Reducing the external noise is becoming a major issue for helicopter manufacturers. The idea beyond this goal is to reduce or even avoid the blade vortex interaction (BVI), especially during descent and flights over inhabited areas. This can be achieved by changing locally the lift of the blade. Several strategies to reach this goal are under investigation at EUROCOPTER such as the control of the local incidence of the blade by a direct lift flap. AEROSPATIALE MATRA Corporate Research Centre and AEROSPATIALE MATRA MISSILES proposed an actuator system able to answer EUROCOPTER's needs for moving a direct lift flap. The present paper describes the definition, manufacturing and testing of this new actuator system. This actuator is based on an electromagnetic patented actuation system developed by AEROSPATIALE MATRA MISSILES for missile and aeronautic applications. The particularity of this actuator is its ability to produce the desired force on its whole range of stroke. The flap is designed to be fitted on a DAUPHIN type blade produced by EUROCOPTER and the actuator system was designed to fit the room available within the blade and to produce the right amount of stroke and force within the required frequency range. Other constraints such as centrifugal loading were also taken into account. This paper describes briefly the specifications and the major characteristics of the actuating system and presents some results of its behavior on a representative composite test-bed manufactured by EUROCOPTER when subjected to realistic mechanical loads.

  10. Controle d'attitude d'un lanceur en phase atmospherique approche par applications gardiennes

    NASA Astrophysics Data System (ADS)

    Dubanchet, Vincent

    In a first phase, the modelling process underlines the presence of highly time varying parameters during the ascent, due to a fast mass variation along with propellant consumption. Linearizing the dynamical equations at six main flight instants yields linear time invariant models to be considered during control design. Each of them is to be stabilized by one control law, while respecting given specifications. The synthesis becomes even more complex when the bending modes are taken into account. Moreover, scheduling appears necessary to deal with the time variations. Indeed it is shown that no single gain setting is able to respect all the specifications along the trajectory. Furthermore, increasing complexity when modelling a whole launch vehicle pushes one to consider the model's errors and uncertainties. They represent a major issue in this study since it is asked to ensure the nominal performances in a robust fashion. Owing to their properties, guardian maps appear to be the most suitable tool to deal with such a problem of scheduling with robust performances. In light of this, the development of synthesis methods based on guardian maps is the main contribution of the project. It appears that actual state of the art in this field is focused on theoretical issues, whereas practical ones could be improved. Two approches are presented in the memoire. The first one is based on a graphical approach consisting in drawing the vanishing locus of guardian maps. A program using image analysis techniques is devised to check automatically which gain settings satisfy the constraints. The second one is based on an optimisation procedure involving guardian maps. Starting with the open loop system, the iterative process proposed ends up with a satisfactory gain setting for the closed-loop. These methods are tried and tested for the launch vehicle, with specifications from ASTRIUM-ST. Their practical application is motivated by the system complexity, the different kinds of constraints and the essential need for robustness. Many restrictions that finally bring about the interest and the efficiency of guardian maps for such a problem.

  11. La gestion des gestionnaires de projets: Le cas de l'industrie aerospatiale au Quebec

    NASA Astrophysics Data System (ADS)

    Petit, Marie-Claude

    This research focuses on the management of project managers (PMs) working in high technology organizations. In particular, it examines how these professionals are taken charge of from a human resources management (HRM) standpoint in firms within the aerospace industry in Quebec. The literature in the field of project management generally depicts PMs as entrepreneurs and resource managers, managing human resources (e.g. project team members) among other things. It also defines them as single-handedly responsible for managing their own career, stress and motivation. This profile suggests that once selected and assigned to projects, PMs receive little attention in terms of HRM from the organization. It is hardly conceivable, however, that PMs would move about completely on their own within the organization, let alone that they wouldn't represent any special challenge in terms of HRM, as the ones the literature so clearly underlines for project team members. The review of the literature also reveals that the subject of HRM as applied to PMs is poorly documented empirically, especially on the topic of what particular challenges the project context might bring up for the HRM of PMs. There is also little told about the actors involved in supporting and contributing to meet the challenges that arise out of managing PMs. This study sought to discern those challenges and the means put forth to address them. Also, it wanted to identify the actors of the HRM of PMs, their roles, their skills, and their relationships, among themselves and with the PMs, in order to efficiently take charge of them. This study also wanted to demonstrate the logic that ties the means put forth by the identified actors with the objectives PM-employing organizations want to reach. Finally, the study wanted to identify the impact of the HRM of PMs as it is occurring in organizations. The Quebec aerospace sector was chosen as the field of research primarily because the success of projects in organizations of that sector, alongside regular manufacturing operations, seems to contribute to their performance. In fact, most of these organizations currently are industry leaders worldwide. The data that form the basis of this research were obtained through 65 semi-structured interviews with representatives of project management, HRM and upper management in eight organizations in the aerospace industry in Quebec. First, the collected data was treated case by case using the qualitative data analysis software application Atlas.ti. Subsequently, the description and interpretation of the data were developed in a transversal way to achieve a sector-wide portrait of the HRM of PMs. The results reveal that PMs, like other human resources, do present particular HRM challenges and are actually managed as such in the organizations. PMs benefit both from traditional HRM practices (collective HRM) and from the relationship established and maintained with their immediate manager (individualized HRM). A network of actors is also involved in the HRM of PMs. Among these, the immediate manager of PMs stands out as the key HRM actor. In addition to applying HRM policies and practices to PMs, the manager of PMs, in his position of proximity with PMs, is destined to play different roles such as coach, motivator and talent agent. This hybrid HRM of PMs provides a sense of well-being among PMs and allows organizations to retain these creators of value, it secures faithful customers (repeat business) as a consequence of the success of projects managed by those PMs, and contributes to build a pool for their future managerial elite. Keywords: project management, human resource management, project manager, proximity management, high technology, aerospace industry, Quebec.

  12. Noise measurement flight test: Data-analyses Aerospatiale SA-365N Dauphin 2 helicopter

    NASA Astrophysics Data System (ADS)

    Newman, J. S.; Rickely, E. J.; Daboin, S. A.; Beattie, K. R.

    1984-04-01

    This report documents the results of a Federal Aviation Administration (FAA) noise measurement flight test program with the Dauphin twin-jet helicopter. The report contains documentary sections describing the acoustical characteristics of the subject helicopter and provides analyses and discussions addressing topics ranging from acoustical propagation to environmental impact of helicopter noise. This report is the second in a series of seven documenting the FAA helicopter noise measurement program conducted at Dulles International Airport during the summer of 1983. The Dauphin test program involved the acquisition of detailed acoustical, position and meteorological data. This test program was designed to address a series of objectives including: (1) acquisition of acoustical data for use in assessing heliport environment impact, (2) documentation of directivity characteristics for static operation of helicopters, (3) establishment of ground-to-ground and air-to-ground acoustical propagation relationships for helicopters, (4) determination of noise event duration influences on energy dose acoustical metrics, (5) examination of the differences between noise measured by a surface mounted microphone and a microphone mounted at a height of four feet (1.2 meters), and (6) documentation of noise levels acquired using international helicopter noise certification test procedures.

  13. Generation de chemins de couverture pour des operations automatisees de controle non destructif appliquees dans l'industrie aerospatiale

    NASA Astrophysics Data System (ADS)

    Olivieri, Pierre

    Non destructive testing (NDT) plays an important role in the aerospace industry during the fabrication and maintenance of the structures built and is used, among other useful applications, to detect flaws such as cracks at an early stage. However, NDT techniques are still mainly done manually, especially on complex aeronautical structures, which then results in several drawbacks. In addition to be difficult and time-consuming, reliability and repeatability of inspection results are likely to be affected, since they rely on each operator's experience and dexterity. The present thesis is part of a larger project (MANU-418) of the Consortium for Research and Innovation in Aerospace in Quebec (CRIAQ). In this project, it has been proposed to develop a system using a 6-DOF manipulator arm to automate three particular NDT techniques often needed in the aerospace industry: eddy current testing (ECT), fluorescent penetrant inspection (FPI), and infrared thermography (IRT). The main objective of the MANU-418 project is to demonstrate the efficiency of the developed system and provide inspection results of surface and near surface flaws (cracks usually) at least as reliably and repeatably as inspection results from a human operator. One specific objective stemming from the main objective of the project is to develop a methodology and a software tool to generate covering paths adapted for the three aforementioned NDT techniques to inspect the complex surfaces of aerospace structures. The present thesis aims at reaching this specific objective. At first, geometrical and topological properties of the surfaces considered in this project are defined (flat surfaces, round and straight edges, cylindrical or near cylindrical surfaces, holes). It is also assumed that the 3D model of the surface to inspect is known in advance. Moreover, it has been decided within the framework of the MANU-418 project to give priority to the automation of ECT compared with the other techniques (FPI and IRT). As a result, the methodology developed to generate inspection paths is more closely focused on path constraints relative to the manual operations of ECT using a differential eddy current probe (named here EC probe), but it is developed to be flexible enough to be used with the other techniques as well. Common inspection paths for ECT are usually defined by a sweeping motion using a zigzag pattern with the EC probe in mild contact with the inspected surface. Moreover, the main axis of the probe must keep a normal orientation with the surface, and the alignment of its two coils must always be oriented along the direction of its motion. A first methodology is then proposed to generate covering paths on the whole surface of interest while meeting all EC probe motion constraints. First, the surface is meshed with triangular facets, and then it is subdivided into several patches such that their geometry and topology are simpler than the whole surface. Paths are then generated on each patch by intersecting their facets with offset section planes defined along a sweeping direction. Furthermore, another methodology is developed to generate paths around an indication (namely a small area where the presence of a flaw is suspected) whose position and orientation are assumed to be known a priori.. Then, a software tool with a graphical user interface has been developed in the MATLAB environment to generate inspection paths based on these methodologies. A set of path parameters can be changed by the user to get desired paths (distance between passes, sweep direction, etc.). Once paths are computed, an ordered list of coordinates (positions and orientations) of the tool is exported in an EXCEL spreadsheet so that it could be used with a real robot. In this research, these data are then used to perform simulations of trajectories (path described as a function of the time) with a MotoMan robot (model SV3XL) using the MotoSim software. After validation of these trajectories in this software (absence of collisions, positions are all reachable, etc.), they are finally converted into instructions for the real MotoMan robot to proceed with experimental tests. These first simulations and experimentations on a MotoMan robot of the generated paths have given results close to the expected inspection trajectories used manually in the NDT techniques considered, especially for the ECT technique. Nevertheless, it is strongly recommended to validate this path generation method with more experimental tests. For instance, a "test" tool could be manufactured to measure errors of position and orientation of this tool with respect to expected trajectories on a typical complex aeronautical structure. (Abstract shortened by UMI.).

  14. Congreve and toulouse

    NASA Astrophysics Data System (ADS)

    Escalettes, J.-P.; Jung, Ph.

    Toulouse is well known as probably the biggest European aerospace concentration with such names as Aerospatiale, Dassault, Thomson, MATRA, CNES, Air France and many others. What is less known, however, is that nearly two centuries ago an early rocketry pioneer, William Congreve, had his rockets used in anger during the Toulouse battle. Even more interesting, he later happened to stay in the Languedoc capital while trying to find his way to Nice on his boat: death caught him there before he could reach his final destination. This paper explains the significance of the use of Congreve rockets during the Toulouse battle, which was actually the last Napoleonic combat before exile. It also elaborates on the research trying to clarify the many unknowns about Congreve's stay in Toulouse at the end of his life. This includes a search for his grave since the original one has been displaced with the disappearance under the builder's axe of the original Protestant and Jewish Cemetery in the town centre.

  15. Study of frequency selective systems. Part 1: Preliminary investments on shapes and lattices; software developments. Part 2: Interfacing of Politecnico FSS programs with MATRA reflector antenna software. Part 3: Application to MACS phase 2 TX antenna (MATRA)

    NASA Astrophysics Data System (ADS)

    Mantica, P. G.; Tascone, R.; Orta, R.; Zich, R.

    1985-12-01

    The impact of frequency selective surfaces (FSS) on an offset Cassegrain satellite antenna comprising one solid main reflector, two dichroic subreflectors, and the feed clusters was assessed. Patch shapes and lattices were studied in order to develop FSS software. The FSS programs were interfaced with reflector antenna software. The complete package was applied to the MACS phase 2 TX antenna. Results show that the software can analyze any common FSS configuration with all necessary details: single or multigrid periodic structures (conductive patches) inserted in a sandwich of dielectric layers. The link with reflector antenna software allows an accurate prediction of overall antenna performance. Analysis reveals cross-polarization limitations in offset configuration, and phase shifts in dual-grid configuration with a wide range of incidence angles. This leads to a depointing of the beam radiated by the antenna. To compensate, two solutions appear feasible: either repoint the whole antenna, or vary the spacing between the two grids with respect to the incidence angles.

  16. Mobilization and attenuation of metals downstream from a base-metal mining site in the Matra Mountains, northeastern Hungary

    USGS Publications Warehouse

    Odor, L.; Wanty, R.B.; Horvath, I.; Fugedi, U.

    1999-01-01

    Regional geochemical baseline values have been established for Hungary by the use of low-density stream-sediment surveys of flood-plain deposits of large drainage basins and of the fine fraction of stream sediments. The baseline values and anomaly thresholds thus produced helped to evaluate the importance of high toxic element concentrations found in soils in a valley downstream of a polymetallic vein-type base-metal mine. Erosion of the mine dumps and flotation dump, losses of metals during filtering, storage and transportation, human neglects, and operational breakdowns, have all contributed to the contamination of a small catchment basin in a procession of releases of solid waste. The sulfide-rich waste material weathers to a yellow color; this layer of 'yellow sand' blankets a narrow strip of the floodplain of Toka Creek in the valley near the town of Gyongyosoroszi. Contamination was spread out in the valley by floods. Metals present in the yellow sand include Pb, As, Cd, Cu, Zn, and Sb. Exposure of the local population to these metals may occur through inhalation of airborne particulates or by ingestion of these metals that are taken up by crops grown in the valley. To evaluate the areal extent and depth of the contamination, active stream sediment, flood-plain deposits, lake or reservoir sediments, soils, and surface water were sampled along the erosion pathways downstream of the mine and dumps. The flood-plain profile was sampled in detail to see the vertical distribution of elements and to relate the metal concentrations to the sedimentation and contamination histories of the flood plain. Downward migration of mobile Zn and Cd from the contaminated upper layers under supergene conditions is observed, while vertical migration of Pb, As, Hg and Sb appears to be insignificant. Soil profiles of 137Cs which originated from above-ground atomic bomb tests and the Chernobyl accident, provide good evidence that the upper 30-40 cm of the flood-plain sections, which includes the yellow sand contamination, were deposited in the last 30-40 years.The regional geochemical baseline values are established for Hungary using low-density stream-sediment surveys of flood-plain deposits of large drainage basins and of the fine fraction of stream sediments. The baseline values and anomaly thresholds allowed the evaluation of the importance of high toxic element concentrations in soils in a valley, downstream of a polymetallic vein-type base-metal mine. The metals present in the yellow sand include Pb, As, Cd, Cu, Zn and Sb. To evaluate the areal extent and depth of the contamination, active stream sediment, flood-plain deposits, lake or reservoir sediments, the soils and surface water were sampled along the erosion pathways downstream of the mine and dumps.

  17. Ariane 5 and Ariane 5 Evolution GN&C Overview

    NASA Astrophysics Data System (ADS)

    Pignié, G.

    The objective of the paper is to give an overview of the Guidance Navigation and Control (GN&C) principles used for the Ariane 5 Launchers Family, developed for the European Space Agency. The development of the GN&C system, for the Ariane 5 Launcher, within EADS Launch Vehicle Company (formerly "Aérospatiale Space and Strategic Systems Division", and "Aérospatiale - Matra lanceurs"), and under supervision of CNES (French National Space Agency, acting as the prime contractor for Ariane Family) took a wide benefit from the existing, and flight validated methods used for the Ariane 4 Launcher, but a significant amount of new features were added, concerning the control loop, the guidance loop - where a fully adaptive guidance algorithm for exo- atmospheric flight was chosen - and the Failure Detection, Isolation, and Recovery (FIR) management for the sensors. In the paper, we shall describe first the Ariane 5 original version GN&C (for the so-called Ariane 5 Generic launcher), but the improvements designed for the upgraded Ariane 5 Evolution, with a cryogenic third stage, will be also addressed. The first part shall be dedicated to a review of the main constraints and requirements on the GN&C system. In the second part of the paper we shall present the main features of the architecture of the GN&C system, starting from the navigation and control sensors, through the on board computer and software, and going finally to the stages Thrust Vectoring Control (TVC) subsystems, used to control the launcher during the propelled phase, as well as to the attitude control subsystem (ACS), used to control the post boost manoeuvres, and payload injection and jettisoning conditions . The main principles of the subsystems and equipment's redundancy will be also briefly addressed. In the third part, an overall description of the different algorithms, implemented for Navigation, Guidance, Control, and sensors Failure Detection, Isolation, and Recovery (FIR), for atmospheric flight

  18. History of infrared optronics in France

    NASA Astrophysics Data System (ADS)

    Fouilloy, J. P.; Siriex, Michel B.

    1995-09-01

    In France, the real start of work on the applications of infrared radiations occurred around 1947 - 1948. During many years, technological research was performed in the field of detectors, optical material, modulation techniques, and a lot of measurements were made in order to acquire a better knowledge of the propagation medium and radiation of IR sources, namely those of jet engines. The birth of industrial infrared activities in France started with the Franco-German missile guidance programs: Milan, HOT, Roland and the French air to air missile seeker programs: R530, MAGIC. At these early stages of IR technologies development, it was a great technical adventure for both the governmental agencies and industry to develop: detector technology with PbS and InSb, detector cooling for 3 - 5 micrometer wavelength range, optical material transparent in the infrared, opto mechanical design, signal processing and related electronic technologies. Etablissement Jean Turck and SAT were the pioneers associated with Aerospatiale, Matra and under contracts from the French Ministry of Defence (DGA). In the 60s, the need arose to enhance night vision capability of equipment in service with the French Army. TRT was chosen by DGA to develop the first thermal imagers: LUTHER 1, 2, and 3 with an increasing number of detectors and image frequency rate. This period was also the era in which the SAT detector made rapid advance. After basic work done in the CNRS and with the support of DGA, SAT became the world leader of MCT photovoltaic detector working in the 8 to 12 micron waveband. From 1979, TRT and SAT were given the responsibility for the joint development and production of the first generation French thermal imaging modular system so-called SMT. Now, THOMSON TTD Optronique takes over the opto-electronics activities of TRT. Laser based systems were also studied for military application using YAG type laser and CO2 laser: Laboratoire de Marcousis, CILAS, THOMSON CSF and SAT have

  19. Progress in industrial holography in France

    NASA Astrophysics Data System (ADS)

    Smigielski, Paul

    1992-01-01

    Industrial applications of holography in France are briefly reviewed. Particular attention is given to nondestructive testing of helicopter blades at Aerospatiale Central Laboratory, the use of holography at Renault for car-engine vibration study, vibration characterization of turbo-jet engine components at SNECMA, and vibration analysis of plates in an industrial hemodynamic tunnel.

  20. 76 FR 21917 - Sunshine Act Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-19

    ... Airlines Flight 8284, Avions de Transport R gional Aerospatiale Alenia ATR 42 320, N902FX, Lubbock, Texas... at http:// www.ntsb.gov . FOR FURTHER INFORMATION CONTACT: Candi Bing, (202) 314-6403 or by e- mail at bingc@ntsb.gov . Dated: April 15, 2011. Candi R. Bing, Federal Register Liaison Officer....

  1. On-orbit demonstrations of automated closure and capture using ESA-developed proximity operations technologies and an existing serviceable NASA Explorer platform spacecraft

    NASA Technical Reports Server (NTRS)

    Hohweisner, Bill; Pairot, Jean-Michael

    1991-01-01

    Since 1984 the European Space Agency (ESA) has been working to develop an autonomous rendezvous and docking capability to enable Hermes to dock automatically with Columbus. As a result, ESA (with Matra, MBB, and other space companies) have developed technologies that are directly supportive of the current NASA initiative for Automated Rendezvous and Capture. Fairchild and Matra would like to discuss the results of the applicable ESA/Matra rendezvous and capture developments and suggest how these capabilities could be used together with an existing NASA Explorer Platform satellite to minimize new development and accomplish a cost-effective automatic closure and capture demonstration program.

  2. Interferometric spectro-imager system (ISIS)

    NASA Astrophysics Data System (ADS)

    Vermande, Paul; Buil, Christian; Delbru, Francis

    1987-01-01

    This paper concerns an original design for a spectroimager, in which spectral analysis is performed by interferometry, with the necessary path difference being obtained as a direct result of the apparent displacement of the source as seen from the satellite while orbiting. Descriptions are given of the breadboard model used to determine the feasibility of the project, and of the transportable spectroimager (SIT) currently being produced at Aerospatiale Cannes (France).

  3. EADS Roadmap for Launch Vehicles

    NASA Astrophysics Data System (ADS)

    Eymar, Patrick; Grimard, Max

    2002-01-01

    still think about the future, especially at industry level in order to make the most judicious choices in technologies, vehicle types as well as human resources and facilities specialization (especially after recent merger moves). and production as prime contractor, industrial architect or stage provider have taken benefit of this expertise and especially of all the studies ran under national funding and own financing on reusable vehicles and ground/flight demonstrators have analyzed several scenarios. VEHICLES/ASTRIUM SI strategy w.r.t. launch vehicles for the two next decades. Among the main inputs taken into account of course visions of the market evolutions have been considered, but also enlargement of international cooperations and governments requests and supports (e.g. with the influence of large international ventures). 1 patrick.eymar@lanceurs.aeromatra.com 2

  4. Tracks for Eastern/Western European Future Launch Vehicles Cooperation

    NASA Astrophysics Data System (ADS)

    Eymar, Patrick; Bertschi, Markus

    2002-01-01

    exclusively upon Western European elements indigenously produced. Yet some private initiatives took place successfully in the second half of the nineties (Eurockot and Starsem) bringing together companies from Western and Eastern Europe. Evolution of these JV's are already envisioned. But these ventures relied mostly on already existing vehicles. broadening the bases in order to enlarge the reachable world market appears attractive, even if structural difficulties are complicating the process. had recently started to analyze, with KSRC counterparts how mixing Russian and Western European based elements would provide potential competitive edges. and RKA in the frame of the new ESA's Future Launch Preparatory Programme (FLPP). main technical which have been considered as the most promising (reusable LOx/Hydrocarbon engine, experimental reentry vehicles or demonstrators and reusable launch vehicle first stage or booster. international approach. 1 patrick.eymar@lanceurs.aeromatra.com 2

  5. Avionics system design for requirements for the United States Coast Guard HH-65A Dolphin

    NASA Technical Reports Server (NTRS)

    Young, D. A.

    1984-01-01

    Aerospatiale Helicopter Corporation (AHC) was awarded a contract by the United States Coast Guard for a new Short Range Recovery (SRR) Helicopter on 14 June 1979. The award was based upon an overall evaluation of performance, cost, and technical suitability. In this last respect, the SRR helicopter was required to meet a wide variety of mission needs for which the integrated avionics system has a high importance. This paper illustrates the rationale for the avionics system requirements, the system architecture, its capabilities and reliability and its adaptability to a wide variety of military and commercial purposes.

  6. Robot Tools

    NASA Technical Reports Server (NTRS)

    1996-01-01

    Mecanotron, now division of Robotics and Automation Corporation, developed a quick-change welding method called the Automatic Robotics Tool-change System (ARTS) under Marshall Space Flight Center and Rockwell International contracts. The ARTS system has six tool positions ranging from coarse sanding disks and abrasive wheels to cloth polishing wheels with motors of various horsepower. The system is used by fabricators of plastic body parts for the auto industry, by Texas Instruments for making radar domes, and for advanced composites at Aerospatiale in France.

  7. Evaluation of the antipollution function of an inhaler mask for transport aircraft crews - Methodology and first results

    SciTech Connect

    Marotte, H.; Vieillefond, H.

    1984-01-01

    The Laboratoire de Medecine Aerospatiale has developed for respiratory equipment compartments a pollution detection system based on the analysis of mass spectronomy of a tracer gas, easily detectable, nontoxic, and nonpresent in inspired or expired air. The tracer in equipment levels and the environment permits the detection and quantification of system leaks. It is maintained that emergency oxygen equipment onboard aircraft must not only function in the case of accidental depressurization, but also during accidental toxic or hypoxic cabin situations (e.g., a fire caused by a burning electric cable).

  8. Hub and blade structural loads measurements of an SA349/2 helicopter

    NASA Technical Reports Server (NTRS)

    Yamauchi, Gloria K.; Heffernan, Ruth M.; Gaubert, Michel

    1988-01-01

    Data from 23 flight conditions, including level flights ranging from advance ratio mu = 0.14 to 0.37 and steady turning flights from advance ratio mu = 0.26 to 0.35, are presented for an Aerospatiale SA349/2 Gazelle helicopter. The data include hub loads data (for 6 of the 23 conditions), blade structural data at eleven different blade radial stations, and fuselage structural data. All dynamic data are presented as harmonic analysis coefficients (ten harmonics per rotor revolution). The data acquisition and reduction procedures are also documented. Blade structural and inertial properties are provided in addition to control system geometry and properties.

  9. Building the VLT with CAT

    NASA Astrophysics Data System (ADS)

    Quattri, M.; Brunetto, E.

    1989-06-01

    The Euclid Computer Aided Design (CAD) system from MATRA-Data, installed at ESO Headquarters, is an indispensable tool for VLT design studies. It also allows to "build" the VLT mechanical structure, as shown on these pictures, of an 8 m unit telescope.

  10. S/W concept for an autonomous rendezvous and docking mission

    NASA Astrophysics Data System (ADS)

    Sommer, J.

    The onboard software required for a typical rendezvous and docking mission profile is discussed. The mission profiles for the MATRA and MBB/ERNO satellites are given along with corresponding satellite configurations. The navigational algorithms used in the individual mission phases are briefly explained, and the corresponding structure of the application software and the related service software are addressed.

  11. Sensor fusion: lane marking detection and autonomous intelligent cruise control system

    NASA Astrophysics Data System (ADS)

    Baret, Marc; Baillarin, S.; Calesse, C.; Martin, Lionel

    1995-12-01

    In the past few years MATRA and RENAULT have developed an Autonomous Intelligent Cruise Control (AICC) system based on a LIDAR sensor. This sensor incorporating a charge coupled device was designed to acquire pulsed laser diode emission reflected by standard car reflectors. The absence of moving mechanical parts, the large field of view, the high measurement rate and the very good accuracy for distance range and angular position of targets make this sensor very interesting. It provides the equipped car with the distance and the relative speed of other vehicles enabling the safety distance to be controlled by acting on the throttle and the automatic gear box. Experiments in various real traffic situations have shown the limitations of this kind of system especially on bends. All AICC sensors are unable to distinguish between a bend and a change of lane. This is easily understood if we consider a road without lane markings. This fact has led MATRA to improve its AICC system by providing the lane marking information. Also in the scope of the EUREKA PROMETHEUS project, MATRA and RENAULT have developed a lane keeping system in order to warn of the drivers lack of vigilance. Thus, MATRA have spread this system to far field lane marking detection and have coupled it with the AICC system. Experiments will be carried out on roads to estimate the gain in performance and comfort due to this fusion.

  12. On-orbit demonstration of automated closure and capture using ESA-developed proximity operations technologies and an existing, serviceable NASA Explorer Platform spacecraft

    NASA Technical Reports Server (NTRS)

    Hohwiesner, Bill; Claudinon, Bernard

    1991-01-01

    The European Space Agency (ESA) has been working to develop an autonomous rendezvous and docking capability since 1984 to enable Hermes to automatically dock with Columbus. As a result, ESA with Matra, MBB, and other space companies have developed technologies that are also directly supportive of the current NASA initiative for Automated Rendezvous and Capture. Fairchild and Matra would like to discuss the results of the applicable ESA/Matra rendezvous and capture developments, and suggest how these capabilities could be used, together with an existing NASA Explorer Platform satellite, to minimize new development and accomplish a cost effective automatic closure and capture demonstration program. Several RV sensors have been developed at breadboard level for the Hermes/Columbus program by Matra, MBB, and SAAB. Detailed algorithms for automatic rendezvous, closure, and capture have been developed by ESA and CNES for application with Hermes to Columbus rendezvous and docking, and they currently are being verified with closed-loop software simulation. The algorithms have multiple closed-loop control modes and phases starting at long range using GPS navigation. Differential navigation is used for coast/continuous thrust homing, holdpoint acquisition, V-bar hopping, and station point acquisition. The proximity operation sensor is used for final closure and capture. A subset of these algorithms, comprising the proximity operations algorithms, could easily be extracted and tailored to a limited objective closure and capture flight demonstration.

  13. The Typology and Dialectology of Romani.

    ERIC Educational Resources Information Center

    Matras, Yaron, Ed.; Bakker, Peter, Ed.; Kyuchukov, Hristo, Ed.

    Papers on typology and dialects of the Romani language include: "Athematic Morphology in Romani: The Borrowing of a Borrowing Pattern" (Peter Bakker); "Towards a Morphology-Based Typology of Romani" (Viktor Elsik); "The Typology of Case Relations and Case Layer Distribution in Romani" (Yaron Matras); "Object Doubling in Romani and the Balkan…

  14. Benefits of advanced software techniques for mission planning systems

    NASA Technical Reports Server (NTRS)

    Gasquet, A.; Parrod, Y.; Desaintvincent, A.

    1994-01-01

    The increasing complexity of modern spacecraft, and the stringent requirement for maximizing their mission return, call for a new generation of Mission Planning Systems (MPS). In this paper, we discuss the requirements for the Space Mission Planning and the benefits which can be expected from Artificial Intelligence techniques through examples of applications developed by Matra Marconi Space.

  15. NOVA/IOPS - MDM/SIO - SL/BIU data transfer test software guide

    NASA Technical Reports Server (NTRS)

    1978-01-01

    The NOVA/IOPS (Input-Output Processor Simulator) is used to control all interface testing of the MDM (Multiplexer Demultiplexer) Breadboard S10 10M (serial input-output-input module) and the Matra Space Lab Inerface Unit (SL/BIU). The software handles bookkeeping such as word error rates, types of errors, display of error buffers, data display and test identification.

  16. Towards a new generation of mission planning systems: Flexibility and performance

    NASA Technical Reports Server (NTRS)

    Gasquet, A.; Parrod, Y.; Desaintvincent, A.

    1994-01-01

    This paper presents some new approaches which are required for a better adequacy of Mission Planning Systems. In particular, the performance flexibility and genericity issues are discussed based on experience acquired through various Mission Planning systems developed by Matra Marconi Space.

  17. High-stability optical components for semiconductor laser intersatellite link experiment (SILEX) project

    NASA Astrophysics Data System (ADS)

    Lepretre, Francois

    1994-09-01

    Within the framework of a MATRA MARCONI SPACE FRANC contract for the European Space Agency, MATRA DEFENSE - DOD/UAO have developed, produced and tested 9 laser diode collimators, 52 optical components (anamorphoser, mirrors, dichroic splitters, redundancy module) and 9 interferential filters. All these space equipments must be integrated into the optical head of the SILEX (Semi-conductor Laser Intersatellite Link Experiment) bench. The SILEX experiment consists in transferring data from a low altitude satellite (SPOT 4) to a satellite in geostationary orbit (ARTEMIS) via beam generated by a laser diode (60 mW Cw). Very low emitted flux and long distance between the two satellites gives rise to the following technical difficulties: high angular (1 (mu) rad) and transverse stability requirements, requirement for high transmission and high rejection narrow band filters, in order to differentiate the transmit and receive channels, necessity of a very good optical wavefront, wavelength range 815-825 nm, 843-853 nm.

  18. Telemetry processing for satellite test systems

    NASA Astrophysics Data System (ADS)

    Montiel, Jean Jacques; Khouri, Noel

    The telemetry processing strategy of the MATRA ground test systems is described. The following issues are discussed: signal processing, telemetry parameter definition and access capabilities, data acquisition and monitoring, utilization and archiving of results, and the man-machine interface. It is concluded that the highly modular hardware and software architecture of these systems makes it possible to adapt them to the specific features of different programs and facilitates new standards of telemetry.

  19. The present status of the HIPPARCOS Project

    NASA Astrophysics Data System (ADS)

    Perryman, M. A. C.

    To complete the accompanying and more detailed information provided by MATRA, INCA, and FAST members on the status of the instrumental parameters, Input Catalogue preparation and FAST data analysis tasks respectively, a concise overview of the project status is given here. This overview presents the current project schedule and emphasizes those areas where recent and significant progress has been made of direct relevance to the scientific groups involved in the project.

  20. On-board expert system for manned rendez-vous operation assistance

    NASA Astrophysics Data System (ADS)

    de Saint-Vincent, A.; Marchal, Ph.

    A 'rendezvous operator assistant concept' is currently being studied by MATRA. It is a real time interactive system, based on Al techniques and directed toward situation assessment and short-term reactions for safety, and also mission replanning. The paper describes the system functionalities and preliminary breadboarding, and addresses the main original features raised by the rendezvous problematics, such as the man-machine interaction and the real-time aspects.

  1. Set Up For Filter And Mirror Efficiencies Measurements In The UV and VUV Spectral Range

    NASA Astrophysics Data System (ADS)

    Pouey, M.; Malherbe, A.

    1986-10-01

    A vacuum reflectometer for the UV and VUV spectral range was developed for qualification of optical components below 400 nm. Typical performances, in the 120-320 nm spectral range, of filters and mirrors offered by MATRA will be presented. Fitted with various gratings and sources this device allows reflecting, transmitting power as well as scattered or diffracted flux measurements (gratings efficiency measurements) until 25 nm.

  2. BREVEL: a Franco/German reconnaissance and target-localization UAV system

    NASA Astrophysics Data System (ADS)

    Schlenkrich, Volker; Stahl, Karl-Hermann

    1993-12-01

    At the end of 1992 Eurodrone, a jointly owned company by MATRA DEFENSE in France and STN in Germany were awarded a contract by the french and german government to develop a reconnaissance and target localization system based on UAV. This article describes the rationale for the chosen design of the system and its performance. The system provides realtime reconnaissance and target localization with high accuracy.

  3. Short range and proximity sensor for autonomous rendez-vous and docking

    NASA Astrophysics Data System (ADS)

    Flamenbaum, S.; Bomer, T.; Jamet, J.; Turon, P.; Krebs, J. P.

    1986-10-01

    Rendezvous and docking (RVD) sensors have currently been the subject of investigation on the part of MATRA and SODERN. The paper presents the 'future flight sensor' together with estimates of accuracy, mass, power, and reliability. The imager sensor for the short range and proximity phases of RVD appears to be the most suitable and promising in terms of performance capability. Moreover, this concept conforms to the present-day Columbus and Hermes specifications.

  4. Human factor implications of the Eurocopter AS332L-1 Super Puma cockpit

    NASA Technical Reports Server (NTRS)

    Padfield, R. Randall

    1993-01-01

    The purpose of this paper is to identify and describe some of the human factor problems which can occur in the cockpit of a modern civilian helicopter. After examining specific hardware and software problems in the cockpit design of the Eurocopter (Aerospatiale) AS332L-1 Super Puma, the author proposes several principles that can be used to avoid similar human factors problems in the design of future cockpits. These principles relate to the use and function of warning lights, the design of autopilots in two-pilot aircraft, and the labeling of switches and warning lights, specifically with respect to abbreviations and translations from languages other than English. In the final section of the paper, the author describes current trends in society which he suggests should be taken into consideration when designing future aircraft cockpits.

  5. Airbus windshear warning and guidance system

    NASA Technical Reports Server (NTRS)

    Bonafe, J. L.

    1990-01-01

    From its first designed airplane, Airbus considered mandatory a help in the crew's decision-making process to initiate an escape maneuver and help to successfully realize it. All the Airbus airplanes designed since 1975 included an alpha-floor function and a speed reference control law imbedded in the speed reference system (SRS) box for A 300 and FAC and FCC for A 310, A300/600 and the A 320. Alpha-Floor function takes into account the airplane energy situation considering angle of attack and observed longitudinal situation in order to apply immediately the full power without any pilot action. Speed reference managers control airspeed and/or ground speed in order to survive a maximum in shear situation. In order to comply with the new FAA regulation: Aerospatiale and Airbus developed more efficient systems. A comparison between 1975 and a newly developed system is given. It is explained how the new system improves the situation.

  6. Flight operations noise tests of eight helicopters

    NASA Astrophysics Data System (ADS)

    Yoshikami, S. A.

    1985-08-01

    This document presents acoustical data and flight path information acquired during the FAA/HAI Helicopter Flight Operations Noise Test Program. As-measured noise levels of the Aerospatiale 365N, Agusta 109A, Bell 206L-1 and 222A, Hughes 500D, MBB BK117, Robinson R22, and Sikorsky S76 are presented for various enroute and heliport flight operations. These operations include level flyovers at two altitudes, normal takeoffs, normal and constant-glideslope approaches, various types of noise abatement approaches, level flight turns and hover (IGE and OGE). The acoustical data are accompanied by radar tracking data and cockpit instrument panel information which document the operational procedures flown, and meteorological measurements to permit data corrections for nonstandard atmospheric conditions. This helicopter operational noise data base can be used in enroute and heliport land use planning, heliport environmental studies and planning guidelines, pilot familiarization and training, verification of noise prediction and estimating methods, and lateral attenuation studies.

  7. The Huygens probe arrives in a cargo plane at the Skid Strip, CCAS

    NASA Technical Reports Server (NTRS)

    1997-01-01

    The Huygens probe, which will study the clouds, atmosphere and surface of Saturn's moon, Titan, as part of the Cassini mission to Saturn, arrives in a cargo plane at the Skid Strip, Cape Canaveral Air Station (CCAS). The probe was designed and developed for the European Space Agency (ESA) by a European industrial consortium led by Aerospatiale as prime contractor. Over the past year, it was integrated and tested at the facilities of Daimler Benz Aerospace Dornier Satellitensysteme in Germany. The probe will be mated to the Cassini orbiter, which was designed and assembled at NASA's Jet Propulsion Laboratory in California. The Cassini launch is targeted for October 6 from CCAS aboard a Titan IVB/Centaur expendable launch vehicle. After arrival at Saturn in 2004, the probe will be released from the Cassini orbiter to enter the Titan atmosphere.

  8. The Huygens probe is prepared for transport from the Skid Strip, CCAS

    NASA Technical Reports Server (NTRS)

    1997-01-01

    The Huygens probe, which will study the clouds, atmosphere and surface of Saturn's largest moon, Titan, as part of the Cassini mission to Saturn, is prepared for transport from the Skid Strip, Cape Canaveral Air Station (CCAS), after being off-loaded from a plane. The probe was designed and developed for the European Space Agency (ESA) by a European industrial consortium led by Aerospatiale as prime contractor. Over the past year, it was integrated and tested at the facilities of Daimler Benz Aerospace Dornier Satellitensysteme in Germany. The probe will be mated to the Cassini orbiter, which was designed and assembled at NASA's Jet Propulsion Laboratory in California. The Cassini launch is targeted for October 6 from CCAS aboard a Titan IVB/Centaur expendable launch vehicle. After arrival at Saturn in 2004, the probe will be released from the Cassini orbiter to slowly descend through the Titan atmosphere to the moon's surface.

  9. French research program on the physiological problems caused by weightlessness. Use of the primate model

    NASA Astrophysics Data System (ADS)

    Pesquies, P. C.; Milhaud, C.; Nogues, C.; Klein, M.; Cailler, B.; Bost, R.

    The need to acquire a better knowledge of the main biological problems induced by microgravity implies—in addition to human experimentation—the use of animal models, and primates seem to be particularly well adapted to this type of research. The major areas of investigation to be considered are the phospho-calcium metabolism and the metabolism of supporting tissues, the hydroelectrolytic metabolism, the cardiovascular function, awakeness, sleep-awakeness cycles, the physiology of equilibrium and the pathophysiology of space sickness. Considering this program, the Centre d'Etudes et de Recherches de Medecine Aerospatiale, under the sponsorship of the Centre National d'Etudes Spatiales, developed both a program of research on restrained primates for the French-U.S. space cooperation (Spacelab program) and for the French-Soviet space cooperation (Bio-cosmos program), and simulation of the effects of microgravity by head-down bedrest. Its major characteristics are discussed in the study.

  10. CIRCE: a new approach to performance management of optical instruments

    NASA Astrophysics Data System (ADS)

    Philoreau, Sandrine; Simeoni, Denis; Miras, Didier; Papegay, Y.; De Sousa, J.

    1996-10-01

    This paper introduces the 'complex instruments ranking with a new computational environment' or CIRCE software tool for aiding elaboration and exploitation of analytic models for performance management of optical instruments. CIRCE is currently developed by the optical instrument preliminary design team at the Aerospatiale Company's Cannes, France, Center, in cooperation with the Institut National de Recherche en Informatique et Automatique' or INRIA at the nearby Science Park of Sophia Antipolis. As a multiprogram tool, CIRCE incorporates the requirements at all stages of optical instrument development, from conception through manufacturing. It affords an original approach to creation and operation of performance models that facilitates know- how conservation through introduction of the notions of concepts (relations bases) and models (computation tree). It eases out the everyday tasks of engineers owing to generating capabilities for performance budgets or parametric analyses and to automatic numeric code generation.

  11. Separation of conductivity and distance measurements for eddy current nondestructive inspection of graphite composite materials

    NASA Astrophysics Data System (ADS)

    Dufour, Isabelle; Placko, Dominique

    1993-06-01

    This article deals with the study of a process based on the principle of eddy current sensors for the nondestructive evaluation of graphite composite plates. This research has been carried out in the Laboratoire d'Electricitd Signaux et Robotique by the team working on datacollecting sensors for robotics in collaboration with Aerospatiale. Eddy current sensors are characterized by their impedance, which varies when a conducting material is approached in their sensitive area. For a given sensor, the output signal depends directly on the electrical and geometrical properties of the object. In the case discussed here, the interesting data are the distance between the sensor and the object, and its local conductivity. In order to invert the relationships between the sensor signal and the properties of the material, an external parametrical model has been developed. A scanning of the surface with a sensor designed for good spatial resolution measurements gives two accurate maps of the useful data.

  12. Facility for testing infrared imaging seekers in a countermeasures environment

    NASA Astrophysics Data System (ADS)

    Sidery, Colin J.; Pyle, Andrew

    2001-08-01

    A new Imaging Infrared Countermeasure Hardware-in-the-Loop facility has been designed and built by Matra BAe Dynamics to test imaging sensors in a complex infrared environment. Drawing upon currently available leading edge technologies and UK expertise, the test bed has ben completed in a twelve-month program. The facility comprises a Thermal Picture Synthesizer with up to four further independent channels, each capable of representing a countermeasure (jammer, flare or laser) within the scene. A six stage broadband reflective collimator relays the complex scene to the sensor.

  13. Towards an operational fault isolation expert system for French telecommunication satellite Telecom 2

    NASA Astrophysics Data System (ADS)

    Haziza, M.

    1990-10-01

    The DIAMS satellite fault isolation expert system shell concept is described. The project, initiated in 1985, has led to the development of a prototype Expert System (ES) dedicated to the Telecom 1 attitude and orbit control system. The prototype ES has been installed in the Telecom 1 satellite control center and evaluated by Telecom 1 operations. The development of a fault isolation ES covering a whole spacecraft (the French telecommunication satellite Telecom 2) is currently being undertaken. Full scale industrial applications raise stringent requirements in terms of knowledge management and software development methodology. The approach used by MATRA ESPACE to face this challenge is outlined.

  14. Comparison of CNES spherical and NASA hemispherical large aperture integrating sources. I - Using a laboratory transfer spectroradiometer. II - Using the SPOT-2 satellite instruments

    NASA Technical Reports Server (NTRS)

    Guenther, B.; Mclean, J.; Leroy, M.; Henry, P.

    1990-01-01

    CNES spherical and NASA hemispherical large aperture calibration sources are examined using a laboratory transfer spectroradiometer and SPOT-2 instruments. The sources, collected at Matra in France during October 1987, are compared in terms of absolute calibration, linearity, and uniformity. The laboratory transfer spectroradiometer data reveal that the calibration results correspond to within about 7 percent absolute accuracy level and the linearity of the CNES source with lamp level is good. It is observed using the satellite data that both sources have an excellent uniformity over a 4 deg field of view.

  15. Influence of a new generation of operations support systems on current spacecraft operations philosophy: The users feedback

    NASA Technical Reports Server (NTRS)

    Darroy, Jean Michel

    1993-01-01

    Current trends in the spacecraft mission operations area (spacecraft & mission complexity, project duration, required flexibility are requiring a breakthrough for what concerns philosophy, organization, and support tools. A major evolution is related to space operations 'informationalization', i.e adding to existing operations support & data processing systems a new generation of tools based on advanced information technologies (object-oriented programming, artificial intelligence, data bases, hypertext) that automate, at least partially, operations tasks that used be performed manually (mission & project planning/scheduling, operations procedures elaboration & execution, data analysis & failure diagnosis). All the major facets of this 'informationalization' are addressed at MATRA MARCONI SPACE, operational applications were fielded and generic products are becoming available. These various applications have generated a significant feedback from the users (at ESA, CNES, ARIANESPACE, MATRA MARCONI SPACE), which is now allowing us to precisely measure how the deployment of this new generation of tools, that we called OPSWARE, can 'reengineer' current spacecraft mission operations philosophy, how it can make space operations faster, better, and cheaper. This paper can be considered as an update of the keynote address 'Knowledge-Based Systems for Spacecraft Control' presented during the first 'Ground Data Systems for Spacecraft Control' conference in Darmstadt, June 1990, with a special emphasis on these last two years users feedback.

  16. White Light Stray Light Test of the SOHO UVCS

    NASA Technical Reports Server (NTRS)

    Gardner, L. N.; Gardner, L. N.; Fineschi, S.

    1998-01-01

    During the late stages of the integration phase of the Ultraviolet Coronagraph Spectrometer (UVCS) instrument for the Solar and Heliospheric Observatory (SOHO) at MATRA-Marconi in Toulouse, France, SOHO Project management at Goddard Space Flight Center (GSFC) became concerned that the elaborate stray light rejection system for the instrument had not been tested and might possibly be misaligned such that the instrument could not deliver promised scientific returns. A white light stray light test, which would place an upper bound on the value of UVCS's stray light rejection capability, was commissioned, conceived, and carried out. This upper bound value would be indicative of the weakest coronal features the spectrometer would be capable of discerning. The test was rapidly developed at GSFC in coordination with science team members from Harvard-Smithsonian Center for Astrophysics (CFA) and was carried out at MATRA in late February 1995. The outcome of this test helped to justify similar, much desired tests with visible and far ultraviolet light at CFA in a facility specifically designed to perform such testing.

  17. White-light stray light test of the SOHO UVCS

    NASA Astrophysics Data System (ADS)

    Leviton, Douglas B.; Gardner, Larry D.; Fineschi, Silvano; Jhabvala, Murzy D.; Kohl, John L.; Romoli, Marco; Noci, Giancarlo C.

    1998-12-01

    During the late stages of integration at MATRA-Marconi in Toulouse, France of the Ultraviolet Coronagraph Spectrometer (UVCS) for the joint NASA/ESA (European Space Agency) Solar and Heliospheric Observatory (SOHO), project management for the International Solar and Terrestrial Physics Project (ISTP) at Goddard Space Flight Center (GSFC) became concerned that the instrument's elaborate stray light rejection system had not been tested and might possibly be misaligned such that the instrument could not deliver promised scientific returns. A white light stray light test, which would place an upper bound on UVCS's stray light rejection capability, was commissioned, conceived, and carried out. This upper bound value would be indicative of the weakest coronal features the spectrometer would be capable of discerning. The test was rapidly developed at GSFC, in parallel with spacecraft integration, in coordination with science team members from Harvard- Smithsonian Center for Astrophysics (CFA) and was carried out at MATRA in late February 1995. The outcome of this test helped justify later impact to integration schedule to conduct similar much needed testing with visible and far ultraviolet light at CFA in a facility specifically designed to perform such tests.

  18. Course 4: Statistical Turbulence Modelling for the Computation of Physically Complex Flows

    NASA Astrophysics Data System (ADS)

    Leschziner, M. A.

    Contents 1 Approaches to characterising turbulence 2 Some basic statistical properties of turbulence and associated implications 3 Review of "simple" modelling approaches 3.1 The eddy-viscosity concept 3.2 Model categories 3.3 Model applicability 4 Second-moment equations and implied stress-strain interactions 4.1 Near-wall shear 4.2 Streamline curvature 4.3 Separation and recirculating flow 4.4 Rotation 4.5 Irrotational strain 4.6 Heat transfer and stratification 5 Second moment closure 6 Non-linear eddy-viscosity models 7 Application examples 7.1 Overview 7.2 Asymmetric diffuser 7.3 Aerospatiale aerofoil 7.4 Cascade blade 7.5 Axisymmetric impinging jet 7.6 Prolate spheroid 7.7 Round-to-rectangular transition duct 7.8 Wing/flat-plate junction 7.9 Fin-plate junction 7.10 Jet-afterbody combination 8 Concluding remarks

  19. Rise time and response measurements on a LiSOCl2 cell

    NASA Technical Reports Server (NTRS)

    Bastien, Caroline; Lecomte, Eric J.

    1992-01-01

    Dynamic impedance tests were performed on a 180 Ah LiSOCl2 cell in the frame of a short term work contract awarded by Aerospatiale as part of the Hermes Space Plane development work. These tests consisted of rise time and response measurements. The rise time test was performed to show the ability to deliver 4 KW, in the nominal voltage range (75-115 V), within less than 100 microseconds, and after a period at rest of 13 days. The response measurements test consisted of step response and frequency response tests. The frequency response test was performed to characterize the response of the LiSOCl2 cell to a positive or negative load step of 10 A starting from various currents. The test was performed for various depths of discharge and various temperatures. The test results were used to build a mathematical, electrical model of the LiSOCl2 cell which are also presented. The test description, test results, electrical modelization description, and conclusions are presented.

  20. Measurement of the steady surface pressure distribution on a single rotation large scale advanced prop-fan blade at Mach numbers from 0.03 to 0.78

    NASA Technical Reports Server (NTRS)

    Bushnell, Peter

    1988-01-01

    The aerodynamic pressure distribution was determined on a rotating Prop-Fan blade at the S1-MA wind tunnel facility operated by the Office National D'Etudes et de Recherches Aerospatiale (ONERA) in Modane, France. The pressure distributions were measured at thirteen radial stations on a single rotation Large Scale Advanced Prop-Fan (LAP/SR7) blade, for a sequence of operating conditions including inflow Mach numbers ranging from 0.03 to 0.78. Pressure distributions for more than one power coefficient and/or advanced ratio setting were measured for most of the inflow Mach numbers investigated. Due to facility power limitations the Prop-Fan test installation was a two bladed version of the eight design configuration. The power coefficient range investigated was therefore selected to cover typical power loading per blade conditions which occur within the Prop-Fan operating envelope. The experimental results provide an extensive source of information on the aerodynamic behavior of the swept Prop-Fan blade, including details which were elusive to current computational models and do not appear in the two-dimensional airfoil data.

  1. MARSNET: A European network of stations on the surface of Mars

    NASA Astrophysics Data System (ADS)

    Chicarro, A. F.

    Following an ESA preliminary study on the possible areas of European participation in the future international exploration of Mars and an ESA call for ideas of new missions, MARSNET, a network of small surface stations, was selected for further in-depth scientific and technical assessment studies as a potential European contribution to such exploration. Subsequently, the MARSNET phase A studies started in the autumn of 1991. The industrial kickoff took place in early January 1992, following the tender evaluation and the decision to select the Aerospatiale-led consortium including Dornier, Alcatel, Laben, and Etca to perform the industrial studies. The phase A studies ended in early 1993. However, critical items such as an instrument deployment device continue to be studied in the framework of ESA's Technology Research Program. The MARSNET mission consists of a network of three semihard landers to be placed on the Martian surface, several thousand kilometers apart, thus defining a regional/global seismological and meteorological network in the Tharsis region. The small stations would be targeted for landing at scientifically interesting sites in this region of Mars, which is the most likely area to still show tectonic activity; this would allow the seismometers to acquire data for the determination of the internal structure of the planet. Landing site geology and geochemistry will also be studied.

  2. VEGA, a small launch vehicle

    NASA Astrophysics Data System (ADS)

    Duret, François; Fabrizi, Antonio

    1999-09-01

    Several studies have been performed in Europe aiming to promote the full development of a small launch vehicle to put into orbit one ton class spacecrafts. But during the last ten years, the european workforce was mainly oriented towards the qualification of the heavy class ARIANE 5 launch vehicle.Then, due also to lack of visibility on this reduced segment of market, when comparing with the geosatcom market, no proposal was sufficiently attractive to get from the potentially interrested authorities a clear go-ahead, i.e. a financial committment. The situation is now rapidly evolving. Several european states, among them ITALY and FRANCE, are now convinced of the necessity of the availability of such a transportation system, an important argument to promote small missions, using small satellites. Application market will be mainly scientific experiments and earth observation; some telecommunications applications may be also envisaged such as placement of little LEO constellation satellites, or replacement after failure of big LEO constellation satellites. FIAT AVIO and AEROSPATIALE have proposed to their national agencies the development of such a small launch vehicle, named VEGA. The paper presents the story of the industrial proposal, and the present status of the project: Mission spectrum, technical definition, launch service and performance, target development plan and target recurring costs, as well as the industrial organisation for development, procurement, marketing and operations.

  3. Intermetallic and titanium matrix composite materials for hypersonic applications

    SciTech Connect

    Berton, B.; Surdon, G.; Colin, C. |

    1995-09-01

    As part of the French Program of Research and Technology for Advanced Hypersonic Propulsion (PREPHA) which was launched in 1992 between Aerospatiale, Dassault Aviation, ONERA, SNECMA and SEP, an important work is specially devoted to the development of titanium and intermetallic composite materials for large airframe structures. At Dassault Aviation, starting from a long experience in Superplastic Forming - Diffusion Bonding (SPF-DB) of titanium parts, the effort is brought on the manufacturing and characterization of composites made from Timet beta 21S or IMI 834 foils and Textron SCS6 fiber fabrics. At `Aersopatiale Espace & Defence`, associated since a long time about intermetallic composite materials with university research laboratories, the principal effort is brought on plasma technology to develop the gamma titanium aluminide TiAl matrix composite reinforced by protected silicon carbide fibers (BP SM 1240 or TEXTRON SCS6). The objective, is to achieve, after 3 years of time, to elaborate a medium size integrally stiffened panel (300 x 600 sq mm).

  4. Active learning in the space engineering education at Technical University of Madrid

    NASA Astrophysics Data System (ADS)

    Rodríguez, Jacobo; Laverón-Simavilla, Ana; Lapuerta, Victoria; Ezquerro Navarro, Jose Miguel; Cordero-Gracia, Marta

    This work describes the innovative activities performed in the field of space education at the Technical University of Madrid (UPM), in collaboration with the center engaged by the European Space Agency (ESA) in Spain to support the operations for scientific experiments on board the International Space Station (E-USOC). These activities have been integrated along the last academic year of the Aerospatiale Engineering degree. A laboratory has been created, where the students have to validate and integrate the subsystems of a microsatellite by using demonstrator satellites. With the acquired skills, the students participate in a training process centered on Project Based Learning, where the students work in groups to perform the conceptual design of a space mission, being each student responsible for the design of a subsystem of the satellite and another one responsible of the mission design. In parallel, the students perform a training using a ground station, installed at the E-USOC building, which allow them to learn how to communicate with satellites, how to download telemetry and how to process the data. This also allows students to learn how the E-USOC works. Two surveys have been conducted to evaluate the impact of these techniques in the student engineering skills and to know the degree of satisfaction of students with respect to the use of these learning methodologies.

  5. Evaluation of Isolated Fuselage and Rotor-Fuselage Interaction Using CFD

    NASA Technical Reports Server (NTRS)

    Renaud, Thomas; O'Brien, David; Smith, Marilyn; Potsdam, Mark

    2004-01-01

    The US Army Aeroflightdynamics Directorate (AFDD), the French Office National d'Etudes et de Recherches Aerospatiales (ONERA) and the Georgia Institute of Technology (GIT) are working under the United States/France Memorandum of Agreement on Helicopter Aeromechanics to study rotorcraft aeromechanics issues of interest to both nations. As a task under this agreement, a comparative study of the Dauphin 365N helicopter has been undertaken to analyze the capabilities and weaknesses of state-of-the-art computational fluid dynamics (CFD) codes, with the aim of fuselage performance prediction and investigation of rotor-fuselage interaction. Three CFD flow solvers applied on three meshes provide similar results in terms of pressure coefficient. Force predictions vary somewhat. This paper presents details on the grid sensitivity and the low Mach number preconditioning influence. The importance of taking into account the wind tunnel strut and the rotor hub is shown. The pressure coefficients along top and bottom centerlines of the fuselage are in good agreement with the experiment except in the area aft of the hub. There remains a discrepancy between the computed forces and the experimental data due in part to modeling inaccuracies. Rotor- fuselage interactions are performed using uniform and non-uniform actuator disk models in order to simulate the rotor downwash.

  6. Canadian aeronautical mobile data trials

    NASA Technical Reports Server (NTRS)

    Pedersen, Allister; Pearson, Andrea

    1993-01-01

    This paper describes a series of aeronautical mobile data trials conducted on small aircraft (helicopters and fixed wing) utilizing a low-speed store-and-forward mobile data service. The paper outlines the user requirements for aeronautical mobile satellite communications. 'Flight following' and improved wide-area dispatch communications were identified as high priority requirements. A 'proof-of-concept' trial in a Cessna Skymaster aircraft is described. This trial identified certain development work as essential to the introduction of commercial service including antenna development, power supply modifications and doppler software modifications. Other improvements were also proposed. The initial aeronautical mobile data service available for pre-operational (Beta) trials is outlined. Pre-operational field trials commenced in October 1992 and consisted of installations on a Gralen Communications Inc. Cessna 177 and an Aerospatiale Astar 350 series light single engine helicopter. The paper concludes with a discussion of desirable near term mobile data service developments, commercial benefits, current safety benefits and potential future applications for improved safety.

  7. MARSNET: A European network of stations on the surface of Mars

    NASA Technical Reports Server (NTRS)

    Chicarro, A. F.

    1993-01-01

    Following an ESA preliminary study on the possible areas of European participation in the future international exploration of Mars and an ESA call for ideas of new missions, MARSNET, a network of small surface stations, was selected for further in-depth scientific and technical assessment studies as a potential European contribution to such exploration. Subsequently, the MARSNET phase A studies started in the autumn of 1991. The industrial kickoff took place in early January 1992, following the tender evaluation and the decision to select the Aerospatiale-led consortium including Dornier, Alcatel, Laben, and Etca to perform the industrial studies. The phase A studies ended in early 1993. However, critical items such as an instrument deployment device continue to be studied in the framework of ESA's Technology Research Program. The MARSNET mission consists of a network of three semihard landers to be placed on the Martian surface, several thousand kilometers apart, thus defining a regional/global seismological and meteorological network in the Tharsis region. The small stations would be targeted for landing at scientifically interesting sites in this region of Mars, which is the most likely area to still show tectonic activity; this would allow the seismometers to acquire data for the determination of the internal structure of the planet. Landing site geology and geochemistry will also be studied.

  8. ALADIN: an atmosphere laser doppler wind lidar instrument for wind velocity measurements from space

    NASA Astrophysics Data System (ADS)

    Krawczyk, Rodolphe; Ghibaudo, Jean-Bernard; Labandibar, Jean-Yves; Willetts, David V.; Vaughan, M.; Pearson, G.; Harris, M. R.; Flamant, Pierre H.; Salamitou, P.; Dabas, Alain; Charasse, R.; Midavaine, Thierri; Royer, Michel; Heimel, H.

    1995-12-01

    AEROSPATIALE, leading a European team, has just conducted a successful study, under ESA contract, to demonstrate the feasibility of a spaceborne Doppler wind lidar instrument meeting the scientific requirements of wind velocity measurements from space with high spatial resolution. A first parametric investigation, based upon the initial set of mission requirements, and supported by dedicated models and detailed trade-off studies, took account of capabilities of the most promising signal processing algorithms and calibration/validation constrains: it yielded a large conically scanned instrument deemed technologically risky. A risk analysis was then carried out to propose a less challenging instrument meeting most key mission requirements. The fixed line-of-sight concept with return signal accumulation appeared as most attractive. A second set of requirements agreed upon by scientific users was therefore issued, with relaxed constraints mainly on horizontal resolution, keeping roughly the same level of wind velocity measurement accuracy. A second instrument and subsystem trade- off was then performed to eventually produce an attractive instrument concept based upon a pair of small diameter telescopes each one associated to one scanning mirror rotating stepwise around the telescope axis, which drastically reduces the detection bandwidth. Following the main contract, studies of accommodation on the International Space Station have been performed, confirming the interest of such an instrument for wind measurements from space.

  9. ALADIN: an atmospheric laser Doppler wind lidar instrument for wind velocity measurements from space

    NASA Astrophysics Data System (ADS)

    Krawczyk, Rodolphe; Ghibaudo, Jean-Bernard; Labandibar, Jean-Yves; Willetts, David V.; Vaughan, M.; Pearson, G.; Harris, M. R.; Flamant, Pierre H.; Salamitou, P.; Dabas, Alain; Lieutaud, F.; Charasse, R.; Midavaine, Thierri; Royer, Michel; Heimel, H.

    1996-10-01

    AEROSPATIALE, leading a European team, has just conducted a successful study, under ESA contract, to demonstrate the feasibility of a spaceborne Doppler wind lidar instrument meeting the scientific requirements of wind velocity measurements from space with high spatial resolution. A first parametric investigation, based upon the initial set of mission requirements, and supported by dedicated models and detailed trade-off studies, took account of capabilities of most promising signal processing algorithms and calibration/validation constraints: it yielded a large conically scanned instrument deemed technologically risky. A risk analysis was then carried out to propose a less challenging instrument meeting most key mission requirements. The fixed line-of-sight concept with return signal accumulation appeared as most attractive. A second set of requirements agreed upon by scientific users was therefore issued, with relaxed constraints mainly on horizontal resolution, keeping roughly the same level of wind velocity measurement accuracy. A second instrument and subsystem trade-off was then performed to eventually produce an attractive instrument concept based upon a pair of small diameter telescopes each one associated to one scanning mirror rotating stepwise around the telescope axis, which drastically reduces the detection bandwidth. Following the main contract, studies of accommodation on the International Space Station have been performed, confirming the interest of such an instrument for wind measurements from space.

  10. Numerical modelling of microdroplet self-propelled jumping on micro-textured surface

    NASA Astrophysics Data System (ADS)

    Attarzadeh, S. M. Reza; Dolatabadi, Ali; Chun Kim, Kyung

    2015-11-01

    Understanding various stages of single and multiple droplet impact on a super-hydrophobic surface is of interest for many industrial applications such as aerospace industry. In this study, the phenomenon of coalescence induced droplets self-propelled jumping on a micro-textured super-hydrophobic surface is numerically simulated using Volume of Fluid (VOF) method. This model mimics the scenario of coalescing cloud-sized particles over the surface structure of an aircraft. The VOF coupled with a dynamic contact angle model is used to simulate the coalescence of two equal size droplets, that are initially placed very closed to each other with their interface overlapping with each other's which triggers the incipience of their coalescence. The textured surface is modeled as a series of equally spaced squared pillars, with 111° as the intrinsic contact angle all over the solid contact area. It is shown that the radial velocity of coalescing liquid bridge is reverted to upward direction due to the counter action of the surface to the basal area of droplet in contact. The presence of air beneath the droplet inside micro grooves which aimed at repelling water droplet is also captured in this model. The simulated results are found in good agreement with experimental observations. The authors gratefully acknowledge the financial support from Natural Sciences and Engineering Research Council of Canada (NSERC), Consortium de Recherche et d'innovation en Aerospatiale au Quebec (CRIAQ), Bombardier Aerospace, Pratt Whitney Canada.

  11. A Study on the Conceptual Design of a 1,500 MWe Passive PWR with Annular Fuel

    SciTech Connect

    Kwi Lim Lee; Soon Heung Chang

    2004-07-01

    In this study, the preliminary conceptual design of a 1500 MWe pressurized water reactor (PWR) with annular fuel has been performed. This design is derived from the AP1000 which is a 1000 MWe PWR with two-loop. However, the present design is a 1500 MWe PWR with three-loop, passive safety features and extensive plant simplifications to enhance the construction, operation, and maintenance. The preliminary design parameters of this reactor have been determined through simple relation to those of AP1000 for reactor, reactor coolant system, and passive safety injection system. Using the MATRA code, we analyze the core designs for two alternatives on fuel assembly types: solid fuel and annular fuel. The performance of reactor cooling systems is evaluated through the accident of the cold leg break in the core makeup tank loop by using MARS2.1 code. This study presents the developmental strategy, preliminary design parameters and safety analysis results. (authors)

  12. Model of the porphyry copper and polymetallic vein family of deposits - Applications in Slovakia, Hungary, and Romania

    USGS Publications Warehouse

    Drew, L.J.

    2003-01-01

    A tectonic model useful in estimating the occurrence of undiscovered porphyry copper and polymetallic vein systems has been developed. This model is based on the manner in which magmatic and hydrothermal fluids flow and are trapped in fault systems as far-field stress is released in tectonic strain features above subducting plates (e.g. strike-slip fault systems). The structural traps include preferred locations for stock emplacement and tensional-shear fault meshes within the step-overs that localize porphyry- and vein-style deposits. The application of the model is illustrated for the porphyry copper and polymetallic vein deposits in the Central Slovakian Volcanic Field, Slovakia; the Ma??tra Mountains, Hungary; and the Apuseni Mountains, Romania.

  13. Development of a kinetic warhead hardware-in-the-loop simulation

    NASA Astrophysics Data System (ADS)

    Winters, Duane T.; Garcia, James C.; Neighoff, Todd M.; Hipp, Terry L.

    2001-08-01

    The Guidance System Evaluation Laboratory (GSEL) at the Johns Hopkins University Applied Physics Laboratory (JHU/APL) has developed a Hardware-in-the-Loop (HWIL) Kinetic Warhead (KW) test capability to support the STANDARD Missile-3 (SM-3) program. The capability is designed to assess KW functionality in the laboratory using complex IR scene stimulus for pre-flight testing and modeling validation. Key components are a 6-DOF body dynamics simulation computer, a Matra BAe IR scene rendering computer, and a BAe Systems resistive heater IR display. This paper examines some of the unique issues encountered in testing a strapdown IR seeker interceptor using a resistive heater display and their resulting impact on the design of 6-DOF simulation software and supporting test computer architecture. We discuss architecture and software implementation issues along with the complimentary use of high-fidelity all-digital and HWIL simulations to provide a broad test capability.

  14. The first crystal structure of an archaeal helical repeat protein

    PubMed Central

    Yoneda, Kazunari; Sakuraba, Haruhiko; Tsuge, Hideaki; Katunuma, Nobuhiko; Kuramitsu, Seiki; Kawabata, Takeshi; Ohshima, Toshihisa

    2005-01-01

    The crystal structure of ST1625p, a protein encoded by a hypothetical open reading frame ST1625 in the genome of the hyperthermophilic archaeon Sulfolobus tokodaii, was determined at 2.2 Å resolution. The only sequence similarity exhibited by the amino-acid sequence of ST1625p was a 33% identity with the sequence of SSO0983p from S. solfataricus. The 19 kDa monomeric protein was observed to consist of a right-handed superhelix assembled from a tandem repeat of ten α-­helices. A structural homology search using the DALI and MATRAS algorithms indicates that this protein can be classified as a helical repeat protein. PMID:16511116

  15. Improving the management of operational information for safer and more efficient spacecraft operations

    NASA Astrophysics Data System (ADS)

    Lecouat, F.; de Saint Vincent, A.; Brenot, J. M.; Darroy, J. M.; Gaullier, F.; Pham, P.; Pessah, P.

    Spacecraft control centers are getting more and more sophisticated over time. A lot of advanced software is installed to improve operations safety and efficiency. The data bases required by the control center software tools together with the technical documentation used by operators, is called the Operational Information in this paper. The effectiveness of operations not only depends on the functions of the control center but also on the quality and completeness of the Operational Information. It is thus necessary to develop new methods and tools so that the information generated during spacecraft development is adapted to new operations requirements. In the same time these tools can also improve the spacecraft development process itself by facilitating information assets and validation. This is illustrated by Matra Marconi Space (MMS) experience on recent spacecraft development projects where OPSWARE tools are used both for operations preparation and operations execution.

  16. Delivering spacecraft control centers with embedded knowledge-based systems: The methodology issue

    NASA Technical Reports Server (NTRS)

    Ayache, S.; Haziza, M.; Cayrac, D.

    1994-01-01

    Matra Marconi Space (MMS) occupies a leading place in Europe in the domain of satellite and space data processing systems. The maturity of the knowledge-based systems (KBS) technology, the theoretical and practical experience acquired in the development of prototype, pre-operational and operational applications, make it possible today to consider the wide operational deployment of KBS's in space applications. In this perspective, MMS has to prepare the introduction of the new methods and support tools that will form the basis of the development of such systems. This paper introduces elements of the MMS methodology initiatives in the domain and the main rationale that motivated the approach. These initiatives develop along two main axes: knowledge engineering methods and tools, and a hybrid method approach for coexisting knowledge-based and conventional developments.

  17. Performance characterization of the astrium 10 K developmental cryocooler

    NASA Astrophysics Data System (ADS)

    Bruninghaus, C. H. Y.; Kallman, J. P.; Tomlinson, B. J.; Myrick, E.

    2002-05-01

    To satisfy future Air Force mission requirements, the Air Force Research Laboratory (AFRL), sponsored by the Ballistic Missile Defense Organization (BMDO), led a development program for a proof-of-concept cryocooler designed to support a cooling load of 45 mW at 10.4 K. Under the technology development program, Astrium (formerly Matra Marconi Space) in Stevenage, United Kingdom, developed a Stirling cycle cryocooler with four Oxford flexure compressors and a two-stage expansion cold end. The cooler was delivered to AFRL, instrumented, and integrated with a 36-inch vacuum chamber for performance characterization and long life endurance evaluation. This paper contains a short description of the cooler's physical components. Also presented are cool down curves, characteristic load lines, and lessons learned during the characterization process. The cooler will enter a long term endurance evaluation after completion of its performance characterization.

  18. ORION: A Supersynchronous Transfer Orbit mission

    NASA Astrophysics Data System (ADS)

    Walters, I. M.; Baker, J. F.; Shurmer, I. M.

    1995-05-01

    ORION F1 was launched on 29th November 1994 on an Atlas IIA launch vehicle. It was designed, built and delivered in-orbit by Matra Marconi Space Systems Plc and was handed over to ORION Satellite Corporation on 20th January 1995 at its on-station longitude of 37.5 deg W. The mission differed significantly from that of any other geostationary communications satellite in that the Transfer Orbit apogee altitude of 123,507 km was over three times geosynchronous (GEO) altitude and one third of the way to the moon. The SuperSynchronous Transfer Orbit (SSTO) mission is significantly different from the standard Geostationary Transfer Orbit (GTO)mission in a number of ways. This paper discusses the essential features of the mission design through its evolution since 1987 and the details of the highly successful mission itself including a detailed account of the attitude determination achieved using the Galileo Earth and Sun Sensor (ESS).

  19. Fbis report. Science and technology: Economic review, September 19, 1995

    SciTech Connect

    1995-09-19

    ;Partial Contents: Germany: Braunschweig University Tests Organic Semiconductors; France: Ariane-5 Tests Suspended; First Tests in Euro-Russian RECORD Rocket Engine Program; France: Renault`s Multi-Model Assembly Line Presented; Germany: New High Speed Trains Under Development; France: Matra Test Drone, Missile Systems; France: Experimental Project for Automobile Recycling; Germany: Survey of Flexible Manufacturing Developments; Germany: Heinrich Hertz Institute Produces Polymer-Based Circuit; French Firms Introduce Computerized Control Room for Nuclear Plants; German Machine Tool Industry Calls for Information Technology Projects; Germany: R&D Achievements in Digital HDTV Reported; Hungary: Secondary Telecommunications Networks Described; EU: Mergers in Pharmaceutical Industry Reported; SGS-Thomson Business Performance Analyzed; Germany`s Siemens Invest Heavily in UK Semiconductor Plant.

  20. The In-Orbit Battery Reconditioning Experience On Board the Orion 1 Spacecraft

    NASA Technical Reports Server (NTRS)

    Hoover, S. A.; Daughtridge, S.; Johnson, P. J.; King, S. T.

    1997-01-01

    The Orion 1 spacecraft is a three-axis stabilized geostationary earth orbiting commercial communications satellite which was launched on November 29, 1994 aboard an Atlas II launch vehicle. The power subsystem is a dual bus, dual battery semi-regulated system with one 78 Ampere-hour nickel-hydrogen battery per bus. The batteries were built and tested by Eagle Picher Industries, Inc., of Joplin, MO and were integrated into the spacecraft by its manufacturer, Matra Marconi Space UK Ltd. This paper presents the results obtained during the first four in-orbit reconditioning cycles and compares the battery performance to ground test data. In addition, the on-station battery management strategy and implementation constraints are described. Battery performance has been nominal throughout each reconditioning cycle and subsequent eclipse season.

  1. ORION: A Supersynchronous Transfer Orbit mission

    NASA Technical Reports Server (NTRS)

    Walters, I. M.; Baker, J. F.; Shurmer, I. M.

    1995-01-01

    ORION F1 was launched on 29th November 1994 on an Atlas IIA launch vehicle. It was designed, built and delivered in-orbit by Matra Marconi Space Systems Plc and was handed over to ORION Satellite Corporation on 20th January 1995 at its on-station longitude of 37.5 deg W. The mission differed significantly from that of any other geostationary communications satellite in that the Transfer Orbit apogee altitude of 123,507 km was over three times geosynchronous (GEO) altitude and one third of the way to the moon. The SuperSynchronous Transfer Orbit (SSTO) mission is significantly different from the standard Geostationary Transfer Orbit (GTO)mission in a number of ways. This paper discusses the essential features of the mission design through its evolution since 1987 and the details of the highly successful mission itself including a detailed account of the attitude determination achieved using the Galileo Earth and Sun Sensor (ESS).

  2. GPS-based navigation for space applications

    NASA Astrophysics Data System (ADS)

    Champetier, C.; Duhamel, T.; Frezet, M.

    1995-03-01

    We present in this paper a survey of the applications of the GPS (global positioning system) system for spacecraft navigation. The use of the GPS techniques for space missions is a striking example of dual-use of military technology; it can bring vast improvements in performances and, in some cases, for a reduced cost. We only deal in this paper with the functional aspects and performances of GPS uses without addressing the issues of hardware implementation where current developments are leading to an increased miniaturization of the GPS receiver hardware. We start this paper with a general overview of the GPS system and its various uses for space missions. We then focus on four areas where MATRA MARCONI Space has conducted detailed analyses of performances: autonomous navigation for geostationary spacecraft, relative navigation for space rendezvous, differential navigation for landing vehicles, absolute navigation for launchers and reentry vehicles.

  3. 3-D geometrical analysis tool for meteoroids/debris impact risk assessment

    NASA Astrophysics Data System (ADS)

    Borde, J.; Drolshagen, G.

    1991-01-01

    It is widely appreciated that meteoroids and space debris are critical factors in the safety and reliability of future missions, especially long-term mission such as the Space Station Freedom. In this paper, enhanced a 3-D numerical analysis tool for meteoroids/debris risk evaluation is presented. It is based on presently available environment and particle/wall interaction models together with spacecraft shielding design. This provides impact probabilities and resulting damaging effects using realistic geometrical treatments. The shielding by other parts of the spacecraft is considered. It accounts for directional and geometrical effects both in the environment and in the damage evaluation. It includes the latest environment and design models and allows an easy updating of these data as they are improved upon. This tool is a new application of the ESABASE framework, a geometrical system level analysis and engineering tool developed by MATRA ESPACE for ESA/ESTEC.

  4. Advanced thermal control for french-german direct broadcasting satellites TDF1/TVSAT

    NASA Astrophysics Data System (ADS)

    Giovagnoli, F.

    The joint French-German programme of direct broadcasting is comprised of two distinct phases, i.e. 1. the development of the preoperational spacecraft (D3, F3), with 3 active channels out of 5 installed; 2. the production of operational satellites (D5, F5) with 5 channels active, each of them redundant. Aerospatiale is in charge among others of the Thermal Control of the Spacecraft. This paper deals with: thermal concept, analyses and tests programme. The developed platforms should also permit an easy adaptation to various payloads characterized by higher electrical power levels. The high power levels involved imply advanced thermal control for both Main Body and Antenna Module. The thermal control concept must have the following capabilities: • to transfer the concentrated, high power dissipations involved toward outer space, • to maintain in shadow phase (no emission) the correct temperatures with low or zero heating power, • to ensure, in transfer orbit phase (maximum duration about 300 h), satisfactory temperatures with reduced electrical power (satellite 3-axis stabilized, solar generator partially deployed), • to allow extremely non-symmetrical functionings. To solve these various problems, so far never simultaneously encountered on existing satellites, the following devices are used: • various heat pipe networks (D3/F3; 88 heat pipes, total length approx. 118 m), • large quantity of Optical Solar Reflectors (silica mirror, area approx. 6.3 m 2), • lightweight superinsulations, • various types of heaters, • Thermal Control Electronic (TCE) to switch ON/OFF heaters and monitor thermistors.

  5. Huygens space probe ready to leave Europe

    NASA Astrophysics Data System (ADS)

    1997-03-01

    Over the past year, the Huygens probe has been integrated and extensively tested at the facilities of Daimler Benz Aerospace Dornier Satellitensysteme in Ottobrunn near Munich. It was designed and developed for ESA by a European industrial consortium led by Aerospatiale (F) as prime contractor. The European activities have been successfully completed and this is to be formalised by the Flight Acceptance Review which will release the probe for shipment to the USA. To mark this important milestone a press briefing is scheduled for Wednesday, 26 March at 10.00 hours at Daimler-Benz Aerospace Dornier Satellitensysteme in Ottobrunn. The detailed programme of the press briefing is attached. If you wish to attend the press briefing, please complete the attached accreditation form and return it, preferably by fax, to : Daimler Benz Aerospace Dornier Satellitensysteme Mr. Mathias Pikelj, Fax. + 49 7545 8 5589, Tel. + 49 7545 8 9123 NOTE FOR THE EDITORS: Background facts about the Cassini Huygens mission Huygens is a medium-sized mission of ESA's Horizons 2000 programme for space science, and a contribution to the joint NASA ESA Cassini mission. Christiaan Huygens discovered Saturn s moon Titan in 1655, and the mission named after him aims to land a 343 kilogram probe on Titan carrying a package of scientific instruments through the atmosphere. Six sets of instruments will analyse the chemical composition of the atmosphere, observe the weather and topography of Titan, and examine the nature of its surface. Titan is larger than the planet Mercury, and its unique atmosphere, rich in nitrogen and hydrocarbons, may resemble the atmosphere of the primitive Earth, before life began. Nominal dates for the Huygens mission are as follows: * launch, 6 October 1997 * arrival at Saturn, 1 July 2004 * release of Huygens, 6 November 2004 * entry into Titan's atmosphere, 27 November 2004. The Saturn Orbiter, the other element in the Cassini mission, will relay the signals from Huygens to

  6. Servicing of the future European stations/platforms through European means

    NASA Astrophysics Data System (ADS)

    Eymar, P.; Peyrin, Y.; Cougnet, C.; Brudieu, P.; Dutto, P.

    In order to get a better knowledge of servicing problems and scenarii of the future European In Orbit Infrastructure, CNES (French Space Agency) decided to fund two separate servicing analysis, respectively conducted by Aérospatiale and MATRA. Aérospatiale work deals with several possible manned stations, taking into account a previous study, while MATRA work deals with polar platform aspects. The first part (Servicing of manned Space Stations) deals with a possible optimization of the roles to be played both by the future Ariane 5 launcher in automatic mode and by the Hermes Spaceplane for the servicing of some future manned space stations: the Columbus pressurized module on the U.S. Space Station, a non-evolutive one-module autonomous station and a multi-module one with a growth capability. After having identified the potential cargoes required for the maintenance and servicing of these stations (analysis of payloads, maintenance ORUs, consumales, crew exchange) and the possible frequencies of such a servicing, it is intended to show how it can be achieved through European means. Established scenarii make use of the Ariane 5 launcher combined either with the Hermes vehicle or with an automated payload. Solutions using payload carriers and/or logistic modules are examined, and possible impacts on stations and/or vehicles are identified further, following investigations on orbital transfer operations. The second part (Servicing of polar platforms) describes the possible scenarii of in-orbit implementation and servicing of a polar platform (number of Ariane 5 launches, modes of transfer, type of service vehicles, servicing orbit, …). This part is focused on the in-orbit operation to exchange on ORU (Orbital Replaceable Unit), once both platform and Hermes (or other servicing vehicle) are attached. After a review of the main tasks to be performed and the possible means to be used as manipulator or EVA, the paper describes the scenario (extraction of an ORU

  7. The QBito CubeSat: Applications in Space Engineering Education at Technical University of Madrid

    NASA Astrophysics Data System (ADS)

    Fernandez Fraile, Jose Javier; Laverón-Simavilla, Ana; Calvo, Daniel; Moreno Benavides, Efren

    The QBito CubeSat is one of the 50 CubeSats that is being developed for the QB50 project. The project is funded by the 7 (th) Frame Program to launch 50 CubeSats in a ‘string-of-pearls’ configuration for multi-point, in-situ measurements in the lower thermosphere and re-entry research. The 50 CubeSats, developed by an international network of universities and research institutions, will comprise 40 double CubeSats with atmospheric sensors and 10 double or triple CubeSats for science and technology demonstration. It will be the first large-scale CubeSat constellation in orbit; a concept that has been under discussion for several years but not implemented up to now. This project has a high educational interest for universities; beyond the scientific and technological results, being part of an international group of over 90 universities all over the world working and sharing knowledge to achieve a successful mission represents an exciting opportunity. The QBito project main educational motivation is to educate students in space technologies and in space systems engineering. The Universidad Politécnica de Madrid (UPM) is designing, developing, building and testing one of the double CubeSats carrying as payload a kit of atmospheric sensors from the consortium, and other payloads developed by the team such as an IR non-refrigerated sensor, a Phase Change Material (PCM) for thermal control applications, a Fuzzy Logic Attitude Control System and other technological developments such as an optimized antenna deployment mechanism, a lightweight multi-mission configurable structure, and an efficient Electric Power System (EPS) with a Maximum Peak Power Tracker (MPPT). This project has been integrated in the training of the Aerospatiale Engineering, Master and PhD degree students by involving them in the complete engineering process, from its conceptual design to the post-flight conclusions. Three subsystems have been selected for being developed from the conceptual design

  8. Final Report: Deconvolution of Adaptive Optics Images of Titan, Neptune, and Uranus

    SciTech Connect

    Gibbard, S; Marchis, F

    2002-12-20

    This project involved images of Titan, Neptune, and Uranus obtained using the 10-meter W.M. Keck II Telescope and its adaptive optics system. An adaptive optics system corrects for turbulence in the Earth's atmosphere by sampling the wavefront and applying a correction based on the distortion measured for a known source within the same isoplanatic patch as the science target (for example, a point source such as a star). Adaptive optics can achieve a 10-fold increase in resolution over that obtained by images without adaptive optics (for example, Saturn's largest moon Titan is unresolved without adaptive optics but at least 10 resolution elements can be obtained across the disk in Keck adaptive optics images). The adaptive optics correction for atmospheric turbulence is not perfect; a point source is converted to a diffraction-limited core surrounded by a ''halo''. This halo is roughly the size and shape of the uncorrected point spread function one would observe without adaptive optics. In order to enhance the sharpness of the Keck images it is necessary to apply a deconvolution algorithm to the data. Many such deconvolution algorithms exist such as maximum likelihood and maximum entropy. These algorithms suffer to various degrees from noise amplification and creation of artifacts near sharp edges (''ringing''). In order to deconvolve the Keck images I have applied an algorithm specifically developed for observations of planetary bodies, the myopic deconvolution algorithm MISTRAL (''Myopic Iterative STep-preserving Restoration ALgorithm'') (Conan et al. 1998, 2000). MISTRAL was developed by ONERA (Office National d'Etudes et de Recherches Aerospatiales) and has been extensively tested on simulated and real AO observations, including observations of Titan (Coustenis et al.2001), Io (Marchis et al.2002, 2001), and asteroids (Hestroffer et al.2001, Rosenberg et al.2001, Makhoul et al.2001). Compared to more classical methods, MISTRAL avoids noise amplification and

  9. Solar sail on the track

    NASA Astrophysics Data System (ADS)

    Prado, Jean-Yves; Perret, Alain; Ozcariz, Ignazio

    Since the last IAF Congress in Malaga, where it has been stated by the IAF Education Committee that a Solar Sail Race to the Moon is worth to be recommended to IAF organization, the situation has evolved in a favorable way with respect to the U3P objectives to promote a race to the Moon with solar sails and be an entry. As the year 92 will be of great importance for Spain with the Summer Olympic Games in Barcelona, the International Exhibition of Sevilla and the celebration of the Castela sponsored Columbus odyssey, a unique opportunity for fund raising exists. A Spanish association, named Comision Vela Solar, has recently joined U3P to design and build a solar sail, ready for a launch in 1992, together with American and Japanese entries. This agreement between French and Spanish associations has given birth to an industrial cooperation between French firms, lead by MATRA-ESPACE and Spanish firms. In our paper, we describe the mission, give an update version of the rules of the race, draw the main features of the U3P-CVS sail and highlight the technological and educational benefits of this challenging project.

  10. A tectonic model for the spatial occurrence of porphyry copper and polymetallic vein deposits - applications to Central Europe

    USGS Publications Warehouse

    Drew, Lawrence J.

    2006-01-01

    A structural-tectonic model, which was developed to assess the occurrence of undiscovered porphyry copper deposits and associated polymetallic vein systems for the Matra Mountains, Hungary, has been expanded here and applied to other parts of central Europe. The model explains how granitoid stocks are emplaced and hydrothermal fluids flow within local strain features (duplexes) within strike-slip fault systems that develop in continental crust above subducting plates. Areas of extension that lack shear at the corners and along the edges of the fault duplexes are structural traps for the granitoid stocks associated with porphyry copper deposits. By contrast, polymetallic vein deposits are emplaced where shear and extension are prevalent in the interior of the duplexes. This model was applied to the Late Cretaceous-age porphyry copper and polymetallic vein deposits in the Banat-Timok-Srednogorie region of Romania-Serbia-Bulgaria and the middle Miocene-age deposits in Romania and Slovakia. In the first area, porphyry copper deposits are most commonly located at the corners, and occasionally along the edges, of strike-slip fault duplexes, and the few polymetallic vein deposits identified are located at interior sites of the duplexes. In the second area, the model accounts for the preferred sites of porphyry copper and polymetallic vein deposits in the Apuseni Mountains (Romania) and central Slovakian volcanic field (Slovakia).

  11. Characterization of the holographic imaging grating of GOMOS UVIS spectrometer

    NASA Astrophysics Data System (ADS)

    Graeffe, Jussi; Saari, Heikki K.; Astola, Heikki; Rainio, Kari; Mazuray, Lorand; Pierot, Dominique; Craen, Pierre; Gruslin, Michel; Lecat, Jean-Herve; Bonnemason, Francis; Flamand, Jean; Thevenon, Alain

    1996-11-01

    A Finnish-French group has proposed an imaging spectrometer- based instrument for the ENVISAT Earth observation satellite of ESA, which yields a global mapping of the vertical profile of ozone and other related atmospheric gases. The GOMOS instrument works by measuring the UV-visible spectrum of a star that is occulting behind the Earth's atmosphere. The prime contractor of GOMOS is Matra Marconi Space France. The focal plane optics are designed and manufactured by Spacebel Instrumentation S.A. and the holographic grating by Jobin-Yvon. VTT Automation, Measurement Technology has participated in the GOMOS studies since 1989 and is presently responsible for the verification tests of the imaging quality and opto-mechanical interfaces of the holographic imaging grating of GOMOS. The UVIS spectrometer of GOMOS consists of a holographic, aberration corrected grating and of a CCD detector. The alignment of the holographic grating needs as an input very accurate knowledge of the mechanical interfaces. VTT Automation has designed, built and tested a characterization system for the holographic grating. This system combines the accurate optical imaging measurements with the absolute knowledge of the geometrical parameters at the accuracy of plus or minus 10 micrometers which makes the system unique. The developed system has been used for two breadboard gratings and the qualification model grating. The imaging quality results and their analysis together with alignment procedure utilizing of the knowledge of mechanical interfaces is described.

  12. A cross-disciplinary response to improve test activities: The corporate memory capitalization in Ariane4 test domain

    NASA Technical Reports Server (NTRS)

    Vo, Dinh Phuoc; Soler, Christian; Aussenac, N.; Macchion, D.

    1993-01-01

    The Assembly, Integration, Test, and Validation (AIT/AIV) of the Ariane4 Vehicle Equipment Bay was held at Matra Marconi Space (MMS) site of Toulouse for several years. For this activity, incident interpretation necessitates a great deal of different knowledge. When complex faults occur, particularly those appearing during overall control tests, experts of various domains (EGSE, software, on-board equipment) have to join for investigation sessions. Thus, an assistance tool for the identification of faulty equipment will improve the efficiency of diagnosis and the overall productivity of test activities. As a solution, the Aramiihs laboratory proposed considering the opportunity of a knowledge based system intended to assist the tester in diagnosis. This knowledge based system is, in fact, a short-term achievement of a long-term goal which is the capitalization of corporate memory in the Ariane4 test domain. Aramiihs is a research unit where engineers from MMS and researchers from the IRIT-CNRS cooperate on problems concerning new types of man-system interaction.

  13. Radiation impact on spaceborne optics: the dose coefficients approach

    NASA Astrophysics Data System (ADS)

    Fruit, Michel; Gusarov, Andrei I.; Doyle, Dominic B.; Ulbrich, Gerd J.

    1999-12-01

    During the past 30 years of development of Space optical instrumentation for such missions as METEOSAT, SPOT, HIPPARCOS and SILEX with ESA and CNES, Matra Marcon Space (MMS) has conducted extensive studies on the behavior of optical materials under irradiation such as quantifying transmission losses in optical glasses and measuring the dimensional stability of Zerodur as a substrate for mirror applications. Thanks to this background experience, MMS, in cooperation with SCK-CEN, is conducting a study (under ESA sponsorship) to define the approach for the gathering of a comprehensive data base to quantify these effects through the use of linear sensitivity coefficients (so-called `Dose Coefficients'). This follows recent investigations which have shown that the space radiation environment can affect not only transmission but also other characteristics of refractive optical materials in both classical and Cerium doped glasses. A number of selected examples from specific MMS studies will first be shown. Then, the actual approach being taken to this problem, on the basis of already obtained results from preliminary experiments performed by ESTEC, will be presented.

  14. The coarse pointing assembly for SILEX program or how to achieve outstanding pointing accuracy with simple hardware associated with consistent control laws

    NASA Astrophysics Data System (ADS)

    Buvat, Daniel; Muller, Gerard; Peyrot, Patrick

    1991-06-01

    Attention is given to the coarse pointing assembly (CPA) for the SILEX program, designed on the basis of 10 years of MATRA experience in very accurate drive mechanisms successfully conducted by the SPOT 1 and 2 flights as well as EURECA IOC. The basic key design feature of the mechanism is a 1200-step stepper motor driven in microstepping with harmonic defects compensation. This allows very low torque noise associated with a high accuracy (0.01 deg). The direct drive principle avoids backlash and permits a linear control of the output shaft of each drive. The only parts susceptible to possible wear are the ball bearings, which have a design margin of greater than 1000 for 10 yr of service life. In order to meet the dynamic performances required by SILEX, a closed loop active damping system is added to each drive unit. Two accelerometers used in a differential way sense the hinge microvibrations and an active damping loop reduces their Q factor down to a few dB. All CPA electrical parts (including motor, optical encoder, and accelerometer) are redundant to avoid single point of failure.

  15. Formalizing procedures for operations automation, operator training and spacecraft autonomy

    NASA Technical Reports Server (NTRS)

    Lecouat, Francois; Desaintvincent, Arnaud

    1994-01-01

    The generation and validation of operations procedures is a key task of mission preparation that is quite complex and costly. This has motivated the development of software applications providing support for procedures preparation. Several applications have been developed at MATRA MARCONI SPACE (MMS) over the last five years. They are presented in the first section of this paper. The main idea is that if procedures are represented in a formal language, they can be managed more easily with a computer tool and some automatic verifications can be performed. One difficulty is to define a formal language that is easy to use for operators and operations engineers. From the experience of the various procedures management tools developed in the last five years (including the POM, EOA, and CSS projects), MMS has derived OPSMAKER, a generic tool for procedure elaboration and validation. It has been applied to quite different types of missions, ranging from crew procedures (PREVISE system), ground control centers management procedures (PROCSU system), and - most relevant to the present paper - satellite operation procedures (PROCSAT developed for CNES, to support the preparation and verification of SPOT 4 operation procedures, and OPSAT for MMS telecom satellites operation procedures).

  16. Structural re-alignment in an immunologic surface region of ricin A chain

    SciTech Connect

    Zemla, A T; Zhou, C E

    2007-07-24

    We compared structure alignments generated by several protein structure comparison programs to determine whether existing methods would satisfactorily align residues at a highly conserved position within an immunogenic loop in ribosome inactivating proteins (RIPs). Using default settings, structure alignments generated by several programs (CE, DaliLite, FATCAT, LGA, MAMMOTH, MATRAS, SHEBA, SSM) failed to align the respective conserved residues, although LGA reported correct residue-residue (R-R) correspondences when the beta-carbon (Cb) position was used as the point of reference in the alignment calculations. Further tests using variable points of reference indicated that points distal from the beta carbon along a vector connecting the alpha and beta carbons yielded rigid structural alignments in which residues known to be highly conserved in RIPs were reported as corresponding residues in structural comparisons between ricin A chain, abrin-A, and other RIPs. Results suggest that approaches to structure alignment employing alternate point representations corresponding to side chain position may yield structure alignments that are more consistent with observed conservation of functional surface residues than do standard alignment programs, which apply uniform criteria for alignment (i.e., alpha carbon (Ca) as point of reference) along the entirety of the peptide chain. We present the results of tests that suggest the utility of allowing user-specified points of reference in generating alternate structural alignments, and we present a web server for automatically generating such alignments.

  17. Autonomous intelligent cruise control system

    NASA Astrophysics Data System (ADS)

    Baret, Marc; Bomer, Thierry T.; Calesse, C.; Dudych, L.; L'Hoist, P.

    1995-01-01

    Autonomous intelligent cruise control (AICC) systems are not only controlling vehicles' speed but acting on the throttle and eventually on the brakes they could automatically maintain the relative speed and distance between two vehicles in the same lane. And more than just for comfort it appears that these new systems should improve the safety on highways. By applying a technique issued from the space research carried out by MATRA, a sensor based on a charge coupled device (CCD) was designed to acquire the reflected light on standard-mounted car reflectors of pulsed laser diodes emission. The CCD is working in a unique mode called flash during transfer (FDT) which allows identification of target patterns in severe optical environments. It provides high accuracy for distance and angular position of targets. The absence of moving mechanical parts ensures high reliability for this sensor. The large field of view and the high measurement rate give a global situation assessment and a short reaction time. Then, tracking and filtering algorithms have been developed in order to select the target, on which the equipped vehicle determines its safety distance and speed, taking into account its maneuvering and the behaviors of other vehicles.

  18. GLOB(MET)SAT: French proposals for monitoring global change and weather from the polar orbit

    NASA Astrophysics Data System (ADS)

    Durpaire, Jean-Pierre; Ratier, A.; Dagras, C.

    1991-08-01

    A new concept for a polar orbiting satellite dedicated to global change research and its extension to fulfill the meteorological operational mission in the morning orbit is studied by CNES and MATRA, with the support of EUMETSAT and a group of European scientists. Two options were investigated during the feasibility study called GLOB(MET)SAT, the first one, GLOBSAT, restricted to an IGBP-dedicated mission, and the second one, GLOBMETSAT, combining this research mission and the operational met-mission specified by EUMETSAT. The mission objectives, the associated requirements, and the instruments accommodated are presented and discussed, as well as the main results of the phase A study for the space segment. The system configurations, characteristics, performances and the development plan are described. Both options prove feasible and compatible with a target launch date in the 1996-97 timeframe and preserve a significant growth potential. The use of the MK-2 platform developed for the SPOT-4 program and of other recurrent hardware elements appears a significant cost-saving, schedule-securing and reliability factor in both options. In the same line, the GLOBMETSAT system combining the environment and meteorological missions is of mutual benefit for both missions, in terms of reliability, cost sharing and use of platform resources, while keeping each mission independent and unaffected by the other.

  19. Infrared pushbroom camera breadboard using off-the-shelf 2D array of detector

    NASA Astrophysics Data System (ADS)

    Bernier, Joel; Plainchamp, Patrick; Bardon, Dominique

    1994-09-01

    Performances for nowadays optronic systems require focal plane arrays (FPA) with an increasing number of detectors. The `push- broom' technic is well adapted to earth observation in the visible range with the availability of long linear CCD'S offering thousands of pixels. In the infrared, line scan systems are preferred at the present time because technological difficulties have to be overcome in order to get long linear arrays. Among the most important, are: (1) Difficulties to have a large cold focal plane with a temperature uniformity of a few degrees. (2) Difficulties to get good detection material over large surface. Mechanical or optical butting technology can be used there but with dead pixels and/or side effects. (3) Very low cold shield efficiency due to the geometry of the long linear array. (4) Very high development costs. MATRA DEFENSE UAO has made the design of a new infrared FPA concept which has the advantage to overcome all drawbacks listed previously (patented design). The idea consists to transform the pixel arrangement geometry of a 2D array which is available off the shelf into a long linear FPA using a coherent infrared fiber optic reformatter. In order to demonstrate the feasibility of this new FPA concept, a camera breadboard has been built. This task has been supported by the French MOD (STTE). This paper describes this breadboard and gives main technical performances.

  20. Mastering the effect of microvibrations on the performances of reconnaissance satellites

    NASA Astrophysics Data System (ADS)

    Monteil, D.; Guillaud, V.; Laurens, Ph.

    1995-03-01

    The development of very high resolution observation satellites has led to microdynamic problems. The quality of the images produced by reconnaissance satellites implies that they observe stringent line-of-sight stability requirements. The aims of this paper are to present the methodologies used at MATRA MARCONI SPACE (MMS) and to show the importance of tests in the prediction and verification logic. In the first part, stability requirements for reconnaissance satellites are reviewed. Constraints issued from new signal processing technologies are presented. In the second part, microvibration sources, their propagation throughout the satellite and their effects on the line-of-sight (LOS) are detailed. The prediction and verification logic is described in the third part. It is based on an intimate combination of analyses and tests at equipment, subsystem and satellite levels: the proposed approach for microdynamics is similar to thermal and mechanical processes using hierarchical specifications, tests, analyses, and interface control documents. Finally, several examples of microdynamic tests performed at MMS on reconnaissance satellites are presented to illustrate their major contributions to high frequency pointing requirements demonstration.

  1. Lens assemblies for multispectral camera

    NASA Astrophysics Data System (ADS)

    Lepretre, Francois

    1994-09-01

    In the framework of a contract with the Indian Space Research Organization (ISRO), MATRA DEFENSE - DOD/UAO have developed, produced and tested 36 types LISS 1 - LISS 2 lenses and 12 LISS 3 lenses equipped with their interferential filters. These lenses are intended to form the optical systems of multispectral imaging sensors aboard Indian earth observation satellites IRS 1A, 1B, 1C, and 1D. It should be noted that the multispectrum cameras of the IRS 1A - 1B satellite have been in operation for two years and have given very satisfactory results according to ISRO. Each of these multispectrum LISS 3 cameras consists of lenses, each working in a different spectral bandwidth (B2: 520 - 590 nm; B3: 620 - 680 nm; B4: 770 - 860 nm; B5: 1550 - 1700 nm). In order to superimpose the images of each spectral band without digital processing, the image formats (60 mm) of the lenses are registered better that 2 micrometers and remain as such throughout all the environmental tests. Similarly, due to the absence of precise thermal control aboard the satellite, the lenses are as athermal as possible.

  2. European rendezvous and docking system

    NASA Astrophysics Data System (ADS)

    Pairot, J. M.; Frezet, M.; Tailhades, J.; Fehse, W.; Tobias, A.; Getzschmann, A.

    This paper first describes the major design drivers and the key features of the European RendezVous and Docking System Concept. Stemming from technology activities led by the European Space Agency (ESA) with European Industry and National Space Agencies since the beginning of the eighties, the concept has been developed and integrated in the frame of an ESA RVD System Pre-Development Programme initiated at ESTEC in 1989, with MATRA as main contractor. The objective is to verify the overall concept and the main elements within a RVD Proof of Concept Programme in order to provide an early proof of validity to the user projects, the first of which will be the Hermes manned space shuttle. The selected mission scenarii, the RVD functions addressed and the overall system architecture are described. The results of supporting safety, performance and operations analyses are presented. The paper further presents the verification objectives and the major results obtained in the RVD System Pre-Development Programme. This verification approach involves hardware breadboards, software prototypes, development of test facilities in four main development areas: test of RV sensors on a 6 d.o.f. kinematic test facility, test of a docking mechanism front-end mock-up on the docking dynamics test facility, closed-loop test of a prototype RV control software, test of man-in-the-loop concept involving both supervisory control and manual control modes.

  3. Atmospheric lidar predevelopment program (ATLID)

    NASA Astrophysics Data System (ADS)

    Morancais, Didier; Marini, Andrea E.

    1997-09-01

    The Atmospheric Lidar (ATLID) is the backscatter lidar instrument developed for ESA, under the prime contractorship of MATRA MARCONI SPACE France. This kind of lidar has been selected for flight on an ESA Earth Explorer satellite, and will be based on ATLID concept and technologies. It is part of a multi-payload mission, named Earth Radiation, dedicated to the Earth radiative transfer study for climatology. The lidar will provide information on the atmosphere, such as cloud cover, top height of all cloud types and planetary boundary layer, thin cloud extent, optical depth and polarization. The instrument features a pulsed diode-pumped Nd-YAG laser (1.06 micrometers wavelength) together with a one-axis scanning 60 cm lightweight telescope. A technology pre-development program has been performed in order to raise the maturity of the instrument design. Elegant breadboard models have been realised and submitted to environmental tests. The laser transmitter, the laser thermal control subsystem (capillary-pumped two-phase loop), the diode laser power supply, the avalanche photodiode detection chain, the narrow-band filter, the scan mechanism, and the telescope lightweight primary mirror (C-SiC) have been breadboarded in the frame of the programme. The instrument design and performance have also been consolidated with regards to the successful hardware results.

  4. A randomized controlled clinical trial to assess the efficacy of Nasya in reducing the signs and symptoms of cervical spondylosis.

    PubMed

    Radhika, C; Kumar, G Vinod; Mihirjan, K

    2012-01-01

    This work was designed to assess the efficacy of Nasya in reducing the signs and symptoms of cervical spondylosis. The patients attending the O. P. D of Department of Kaya Chikitsa and Panchakarma, Government Ayurveda College Hospital, Thiruvananthapuram were enrolled and subjected to the treatment schedule. Total duration of treatment was 21days. The schedule for the first 14 days was similar in both the groups. It included Rooksha Sveda for 7days followed by Patra Pottali Sveda for 7days. During this period, 90 ml Gandharvahastadi Kashaya twice and Guggulu Tiktaka Kashaya once were given internally. After this, in the Nasya group Nasya was done for 7days with Dhanwantaram Tailam (21times Aavartita), MriduPaka in Madhyama Matra (8Bindu). Along with this Guggulu Tiktaka Kashaya was given thrice. In the control group, Guggulu Tiktaka kashaya alone was given thrice daily. Assessments were done with regard to pain, tenderness, radiation of pain, numbness, range of movements and hand grip strength. These were done before treatment, before nasya, after treatment and after 1month follow-up. The statistical hypothesis was tested using paired 't' test and 'Z' test for proportion. The trial proved that conventional management along with Nasya was more efficacious than conventional management alone in reducing the signs and symptoms of cervical spondylosis. PMID:23049188

  5. Efficient telomerase inhibition in human non-small cell lung cancer cells by liposomal delivery of 2'-O-methyl-RNA.

    PubMed

    Beisner, Julia; Dong, Meng; Taetz, Sebastian; Piotrowska, Kamilla; Kleideiter, Elke; Friedel, Godehard; Schaefer, Ulrich; Lehr, Claus-Michael; Klotz, Ulrich; Mürdter, Thomas E

    2009-05-01

    The antisense oligonucleotide 2'-O-methyl-RNA is a selective telomerase inhibitor targeting the telomerase RNA component and represents a potential candidate for anticancer therapy. The poor cellular uptake of 2'-O-methyl-RNA is a limiting factor that may contribute to the lack of functional efficacy. To improve delivery of 2'-O-methyl-RNA and consequently antitumoral efficiency in human lung cancer cells, we have investigated several transfection reagents. The transfection reagents DOTAP, MegaFectin 60, SuperFect, FuGENE 6 and MATra-A were tested for intracellular delivery. A FAM-labeled 2'-O-methyl-RNA was used to assess the intracellular distribution by confocal laser scanning microscopy in A549 human non-small cell lung cancer cells. Telomerase activity was measured using the telomeric repeat amplification protocol. Cell viability after transfection was quantified by the MTT assay. All transfection reagents enhanced 2'-O-methyl-RNA uptake in A549 cells but the cationic lipid reagents DOTAP and MegaFectin 60 were most efficient in the delivery of 2'-O-methyl-RNA resulting in telomerase inhibition. Among both DOTAP exhibited the lowest cytotoxicity. Our experiments show that DOTAP is the most suitable transfection reagent for the delivery of 2'-O-methyl-RNA in human lung cancer cells according to its relatively low cytotoxicity and its ability to promote efficient uptake leading to the inhibition of telomerase. PMID:18803262

  6. A randomized controlled clinical trial to assess the efficacy of Nasya in reducing the signs and symptoms of cervical spondylosis

    PubMed Central

    Radhika, C; Kumar, G. Vinod; Mihirjan, K.

    2012-01-01

    This work was designed to assess the efficacy of Nasya in reducing the signs and symptoms of cervical spondylosis. The patients attending the O. P. D of Department of Kaya Chikitsa and Panchakarma, Government Ayurveda College Hospital, Thiruvananthapuram were enrolled and subjected to the treatment schedule. Total duration of treatment was 21days. The schedule for the first 14 days was similar in both the groups. It included Rooksha Sveda for 7days followed by Patra Pottali Sveda for 7days. During this period, 90 ml Gandharvahastadi Kashaya twice and Guggulu Tiktaka Kashaya once were given internally. After this, in the Nasya group Nasya was done for 7days with Dhanwantaram Tailam (21times Aavartita), Mridu Paka in Madhyama Matra (8Bindu). Along with this Guggulu Tiktaka Kashaya was given thrice. In the control group, Guggulu Tiktaka kashaya alone was given thrice daily. Assessments were done with regard to pain, tenderness, radiation of pain, numbness, range of movements and hand grip strength. These were done before treatment, before nasya, after treatment and after 1month follow-up. The statistical hypothesis was tested using paired ‘t’ test and ‘Z’ test for proportion. The trial proved that conventional management along with Nasya was more efficacious than conventional management alone in reducing the signs and symptoms of cervical spondylosis. PMID:23049188

  7. [Dutch-Romanian cooperation in the area of family practice].

    PubMed

    van Es, J C

    2001-10-27

    During the years 1992-2000, there was a cooperative programme between the Romanian general practitioners' association (Societatea Nationala de Medicina Generala) in Romania and the Dutch Foundation for the Advancement of Quality in Healthcare in Romania. A succession of programmes were developed and carried out, which were financed by the Dutch government. The purpose of the cooperative programme was to support the development of Romanian general practice in terms of quality and structure. In the first programme, financed by the Dutch Ministry of Health, Welfare and Sport, about 200 Romanian general practitioners received continuing education. This was followed by a social transformation programme (MATRA) that had two parts: (a) the general practitioners association was supported and advised with respect to improving its organisational efficiency and (b) about 50 carefully selected Romanian general practitioners were trained, in post-academic research, management or teaching. The Romanian authorities accredited these trainees as teachers. The co-operation is being continued in 2001 with the setting up of a sentinel station programme in which 100 Romanian general practitioners collect relevant, representative data on health, illness and practice. PMID:11715598

  8. Comparative study of Upavasa and Upavasa with Pachana in the management of Agnisada

    PubMed Central

    Rajani, Ami; Vyas, Mahesh Kumar; Vyas, Hitesh A.

    2010-01-01

    Ayurvedic management is not only concerned with the cure of the diseased person, but is also meant to maintain the health of the healthy person because it is used for Dhatusamya. Langhana is the prime tool in the process of Dhatusamya. In this research study, Upavasa plus Pachana and Upavasa (among ten types of Langhanas) are applied in two different groups, using the random sampling method. Upavasa is taken as Hina Matra Bhojana — that is, gradually increasing the dose of Ahara (by Padanshika Krama) was applied on the basis of the Ahara Shakti of the Atura and status of the Agnisada. Furthermore, for the Pachana, Shunthi (Zingiber officinale) was selected. The subjects for the study were patients who had signs and symptoms of Agnisada and were between the age group of 20 and 60 years. In Group A (Upavasa plus Pachana) 83.77% and in Group B (Upavasa) 72.97% improvement was found, which was statistically highly significant (< 0.001). Upavasa plus Pachana and Upavasa were both found beneficial in promoting the Agni in patients with Agnisada. However, in the percentage-wise comparison Group A showed better result than Group B. PMID:22131738

  9. Comparative study of Upavasa and Upavasa with Pachana in the management of Agnisada.

    PubMed

    Rajani, Ami; Vyas, Mahesh Kumar; Vyas, Hitesh A

    2010-07-01

    Ayurvedic management is not only concerned with the cure of the diseased person, but is also meant to maintain the health of the healthy person because it is used for Dhatusamya. Langhana is the prime tool in the process of Dhatusamya. In this research study, Upavasa plus Pachana and Upavasa (among ten types of Langhanas) are applied in two different groups, using the random sampling method. Upavasa is taken as Hina Matra Bhojana - that is, gradually increasing the dose of Ahara (by Padanshika Krama) was applied on the basis of the Ahara Shakti of the Atura and status of the Agnisada. Furthermore, for the Pachana, Shunthi (Zingiber officinale) was selected. The subjects for the study were patients who had signs and symptoms of Agnisada and were between the age group of 20 and 60 years. In Group A (Upavasa plus Pachana) 83.77% and in Group B (Upavasa) 72.97% improvement was found, which was statistically highly significant (< 0.001). Upavasa plus Pachana and Upavasa were both found beneficial in promoting the Agni in patients with Agnisada. However, in the percentage-wise comparison Group A showed better result than Group B. PMID:22131738

  10. Turnkey solutions for satellite operations

    NASA Astrophysics Data System (ADS)

    Greemillon, Philippe; Gaullier, Francois

    A unique expertise has been developed by Matra Marconi Space (MMS) in satellite operations covering all aspects of operations activities from mission design up to routine on-station operations. This paper describes the various aspects of MMS involvement in satellites operations with emphasis on satellite operations services which can be tailored to customer requirements in order to provide safe operations at low cost. For mission design and operations engineering specific tools and methods have been developed in order to reduce operation costs, perform early validation of satellite procedures, and ensure that return from in orbit experience is used as input for the design of the next programs. MMS has developed an enhanced ground control system based on modern architecture and using multifunction satellite operator workstations as well as orbit functions for colocated satellites and now in use for Hispasat and Telecom 2 at MMS Customer Support Center. Within MMS a Customer Support Center (CSC) has been set up based on this modern Satellite Control Center and connected to advanced AI tools. From the CSC, MMS is able to the propose a full range of operation services to the EUROSTAR customer from early satellite operations training up to Launch and Early Orbit Phase (LEOP) support and back up control center capability.

  11. The ARA Mark 3 solar array design and development

    NASA Technical Reports Server (NTRS)

    vanHassel, Rob H. A.

    1996-01-01

    The ARA (Advanced Rigid Array) Mark3 solar array of Fokker Space BV is currently in its final stages of qualification (wing tests to be completed in March, 1996; unit/part tests in April, 1996). With regard to its predecessor, the ARA Mark2, the design has not only been improved in terms of mechanical and electrical performance, but also with regard to production cost and throughput time. This 'state of the art' array is designed to fit the needs of a wide variety of geostationary telecommunications satellites and is qualified for launch on the complete range of medium/large size commercial launchers (Ariane IV & V, Atlas, Delta, Proton, Long March, H2). The first mission to fly the new ARA Mk3 array is Hot Bird 2 (customer: Eutelsat, prime contractor: Matra Marconi Space; launch: mid-1996). In this configuration, its end of life (EOL) power-to-mass ratio is 42 W/kg, with an operational life of more than 12 years. The main mechanisms on a solar array are typically found in the deployment system and in the hold down and release system. During the design and development phase of these mechanisms, extensive engineering and qualification tests have been performed. This paper presents the key design features of these mechanisms and the improvements that were made with regard to their predecessors. It also describes the qualification philosophy on unit/part and wing level. Finally, some of the development items that turned out to be critical, as well as the lessons learned from them, are discussed.

  12. SOHO Gets Back to Work: Historic First in Space

    NASA Astrophysics Data System (ADS)

    1999-02-01

    The spacecraft went into a self-protection mode (called Emergency Sun Reacquisition - or ESR) on 21 December, when the last of its three gyroscopes failed. Having lost a fundamental orientation system, SOHO continually fired onboard jets to keep its sensors pointed toward the sun. To stop the rapid depletion of hydrazine fuel, over the last month, engineers at ESA and Matra Marconi Space have designed a software program to enable the spacecraft to resume science operations without gyroscopes as from 2 February. The satellite is now reprogrammed to ignore faulty information from the gyroscopes and to use new software sent up by ground controllers. This is the first time that a spacecraft equipped with gyroscopes has carried on working without them. "It's like instructing an airplane pilot from the ground to execute very complex manoeuvres and helping him make a successful landing" said ESA's Michel Verdant, SOHO's programme manager. "SOHO is back at work and we are absolutely thrilled. Thanks to the outstanding efforts of so many highly competent people, SOHO has a new life ahead of it and many discoveries to come," said Roger Bonnet, Director of ESA's science programme. Last summer engineers had already regained control of the observatory after it lost orientation and vanished in space. SOHO was launched in December 1995. After three years of operations, ESA and NASA are now expecting the mission to continue until 2003. The extension will allow SOHO to observe intense solar activity when the number of sunspots reaches a maximum around mid-2000. SOHO remains the flagship of a multinational fleet of solar observatories, including the on-going ESA/NASA Ulysses mission and ESA's forthcoming Cluster II spacecraft. The first picture of the Sun taken by SOHO after the new recovery is available on the Internet at :http://sci.esa.int/soho

  13. SILEX acquisition and tracking sensors

    NASA Astrophysics Data System (ADS)

    Cockshott, Robert A.; Purll, David J.

    1995-04-01

    This paper describes the Acquisition Sensor Detection Unit (ASDU) and the Tracking Sensor Detection Unit (TSDU) developed by Sira Ltd to be flown in the European Space Agency's SILEX (Semi-conductor Inter satellite Link Experiment) terminals. These units were designed, manufactured and qualified by Sira under contract to Matra Marconi Space. Stringent vibration, thermal stability and video waveform noise and timing specifications were critical elements in the design. The ASDU consists of an optical head containing a 385 X 288 CCD and video buffer, and separate electronics box containing clock decoding electronics, CCD clock drivers and video amplifiers. The ASDU operates at a frame rate of 33 or 135 Hz and its noise performance allows the brightest pixel to be detected with an accuracy of +/- 0.5 pixel for input powers in the range 9 - 55 pW (33 Hz) or 16 - 240 pW (135 Hz) during acquisition. Using the ASDU signal, the SILEX pointing, acquisition and tracking system controls the pointing mirrors to centralize the beam, at which point it falls within the smaller TSDU field of view. The TSDU comprises a single 480 g unit containing a 43 mm focal length lens, a 14 X 14 CCD, and clock receiver and video amplifier electronics. During tracking the central 4 CCD pixels are used as a quadrant detector, and the TSDU has demonstrated a noise equivalent angle of 2.7 (mu) rad (1 (sigma) half cone, 180 pW optical input power) at a frame rate of 8 kHz.

  14. High-frame-rate low-latency hardware-in-the-loop image generation: an illustration of the particle method and DIME

    NASA Astrophysics Data System (ADS)

    Cantle, Allan J.; Devlin, Malachy; Lord, Eric; Chamberlain, Richard

    2000-07-01

    New computing architectures based on the DIME standard have been previously introduced which allow for processing of high frame rate imaging systems which may also need low latency capability, a common requirement for HWIL systems. This paper is presented in two sections: To achieve future realism in image generation systems for hardware-in-the-loop (HWIL) testing a significant increase in processing power is required, but additionally a suitable architecture is essential to provide low latency response on the data flow. Nallatech previously introduced DIME as a novel platform for HWIL systems which is capable of handling sub-frame latencies and greater than 100 Hz frame rates. We will demonstrate the system operating on traditional complex imaging problems, such as large convolution masks of 13 X 13 and also on new image generation techniques such as the particle method which is being developed by Matra British Aerospace Dynamics UK (MBDUK). MBDUK are proceeding on upgrading existing HWIL image generation systems for real-time particle models, to higher frame rates and increased complexity. Using Nallatech's latest DIME based architectures, models containing thousands of individual particles can be created at frame rates over 100 Hz and a resolution of 1024 X 1024 oversampled 4 times. This is possible because particle models exhibit high levels of parallelism ideal for exploiting the architecture of an FPGA. This paper will demonstrate the versatility of these particle models to create highly realistic signatures in terms of spatial dynamics and IR signature. Particle models are ideal for simulating dynamic objects such as flares, exhaust plumes, fires and explosions.

  15. In-flight star tracker SED 12 performances on-board the SIGMA experiment

    NASA Astrophysics Data System (ADS)

    Jouret, M.; Sebbag, I.; Vandermarcq, M. Q.; Krebs, J. P.; Le Goff, R.; Vilaire, D.; Tulet, M. M.

    The multimission SED 12 star tracker using a CCD matrix array has been designed by SODERN in cooperation with Matra-Marconi Space (F), respectively in charge of the optical head and software development for one and processing electronics and associated interfaces for the other. It has been selected for the French SIGMA experiment on board the Soviet GRANAT spacecraft which was launched on December 2, 1989. SIGMA is a French hard X-ray/medium energy gamma ray (30 keV-2 MeV) experiment aimed at imaging selected regions of the sky with a resolution of about one arc minute and has been developed and manufactured under the overall management of CNES (the French National Space Agency). The experiment package demands a pointing stability of a few arc-seconds over periods of several hours corresponding to the long exposure times required to build up images of the target gamma sources. As the GRANAT satellite is not able to maintain such high precision attitude stability, incorporated into the gamma telescope are two SED 12 sensors aligned together with the telescope. The development of this star tracker was started in 1985 under a CNES contract, the qualification was successfully performed in 1987 and the delivery of 2 flight models was completed in 1988. The expected life time of the experiment was 1.5 year and since the launch date the mission is still operating without any significant performance degradation of the star tracker. The purpose of this paper is, on the one hand to present the multimission tracker design trade-offs and the SED 12 device: description, main features, operating modes and performances, and on the other hand, to analyze the on ground and in-flight star tracker data. This analysis has been mainly led according to the following criteria: performance results in angular position and magnitude measurement, dark current evolution versus time and radiation dose, correlation between visual and instrumental magnitudes.

  16. Cloning, expression, purification and characterization of UMP kinase from Staphylococcus aureus.

    PubMed

    Hari Prasad, O; Nanda Kumar, Y; Reddy, O V S; Chaudhary, Abhijit; Sarma, P V G K

    2012-04-01

    Uridine monophosphate kinase (UMPK) an enzyme of de novo biosynthesis catalyses the formation of UDP and it is involved in cell wall and RNA biosynthesis. In the present study UMPK of Staphylococcus aureus ATCC12600 was characterized. Analysis of purified UMPK by gel filtration chromatography on Sephadex G-200 indicated a molecular weight of 150 kDa and exhibited monomeric form with molecular weight of 25 kDa in SDS-PAGE confirming homohexamer nature of UMPK in solution. The enzyme kinetics of UMPK showed K(m) of 2.80 ± 0.1 μM and Vmax 51.38 ± 1.39 μM of NADH/min/mg. The enzyme exhibited cooperative kinetics with ATP as substrate, as GTP decreased this cooperativity and increased affinity for ATP. The UMPK gene was amplified, sequenced (Accession number: FJ415072), cloned in pQE30 vector and overexpressed in Escherichia coli DH5α. The purified recombinant UMPK showed similar properties of native UMPK. The UMPK gene sequence showed complete homology with pyrH gene sequence of all S. aureus strains reported in the database, the 3D structure of S. aureus UMPK built from the deduced amino acid sequence was super imposed with human UMPK (PDB ID: 1TEV) to find out the structural identity using the MATRAS programme gave an RMSD value 4.24 Å indicating very low homology and extensive structural variations with human UMPK structure. Thus, UMPK may be a potential drug target in the development of antimicrobials. PMID:22528139

  17. Efforts to recover SOHO spacecraft continue as inquiry board co-chairs named

    NASA Astrophysics Data System (ADS)

    1998-06-01

    A team of experts from ESA and Matra Marconi Space, prime contractor for the SOHO spacecraft, gathered at NASA's Goddard Space Flight Center, Greenbelt, MD, to assist the NASA Flight Operations Team in assessing the situation and analysing the spacecraft status should contact be re-established. Engineers are concentrating on gaining a full understanding of the events which led to the loss of signal, information which might help them devise procedures which may recover contact with SOHO. Commands are being sent to SOHO about once per minute through the DSN's 34-meter antennas instructing the spacecraft to activate its transmitters. Based on the last telemetry data received from SOHO, engineers said it appears most likely that the spacecraft is slowly spinning in such a way that its solar arrays, which generate power, either do not faced the Sun at all or do not received adequate sunlight to generate power. However, based on the last data received, it appears that SOHO's solar panels may be exposed to an increasing amount of sunlight each day as it orbits the Sun. If this assumption is correct, within a few weeks enough sunlight might be hitting the solar panels to generate power to charge its batteries. The incident will be the subject of a joint ESA/NASA inquiry board co-chaired by Prof. Massimo Trella, ESA Inspector General and Dr. Michel Greenfield, Deputy Associate Administrator for the Office of Safety and Mission Assurance, NASA Headquarters. The other members of the board will be selected from ESA and NASA as well as from the scientific community. The board is expected to convene later this week at NASA's Goddard Space Flight Center.

  18. The scientific payload of the HIPPARCOS astrometry satellite

    NASA Astrophysics Data System (ADS)

    Bonnefoy, R.; Fade, G.; Gricourt, C.

    The HIPPARCOS Satellite, a project of the European Space Agency, developed by European Industry led by MATRA, is devoted to astrometry with the ultimate goal of allowing the establishment of a catalogue of stellar astrometric parameters of some 100 000 stars to an accuracy of 2 milliarc-seconds. Whereas the overall aspects of the Hipparcos mission and the design of the platform are presented separately by E. Zeis et al (1) and M. Le Moine et al (2), the present paper deals with a description of the scientific payload of the satellite. The principle of the payload is outlined covering all major design features associated with the optical telescope. The configuration is described in some detail together with the necessary resources. The next section is devoted to a review of the performances required from the payload. The instrumental parameters are recalled, followed by a survey of the mission related performances such as an extreme mechanical and thermal stability, and the very high optical quality of the mirrors. The hardware and associated technology are then described in detail since they are believed to represent in many areas a major challenge for European industry. The status of development is presented for key items such as the Beam Combiner, the Optics, the focal plane modulating grid, and the thermo-mechanical hardware. Finally, the industrial organization is briefly recalled together with the development approach which has been adopted. Since the verification of performances in such a demanding project is essential to the success of the mission, the main performance tests and associated ground support equipment are also presented.

  19. Autonomy for SOHO Ground Operations

    NASA Technical Reports Server (NTRS)

    Truszkowski, Walt; Netreba, Nick; Ginn, Don; Mandutianu, Sanda; Obenschain, Arthur F. (Technical Monitor)

    2001-01-01

    The SOLAR and HELIOSPHERIC OBSERVATORY (SOHO) project [SOHO Web Page] is being carried out by the European Space Agency (ESA) and the US National Aeronautics and Space Administration (NASA) as a cooperative effort between the two agencies in the framework of the Solar Terrestrial Science Program (STSP) comprising SOHO and other missions. SOHO was launched on December 2, 1995. The SOHO spacecraft was built in Europe by an industry team led by Matra, and instruments were provided by European and American scientists. There are nine European Principal Investigators (PI's) and three American ones. Large engineering teams and more than 200 co-investigators from many institutions support the PI's in the development of the instruments and in the preparation of their operations and data analysis. NASA is responsible for the launch and mission operations. Large radio dishes around the world, which form NASA's Deep Space Network (DSN), are used to track the spacecraft beyond the Earths orbit. Mission control is based at Goddard Space Flight Center in Maryland. The agent group at the NASA Goddard Space Flight Center, in collaboration with JPL, is currently involved with the design and development of an agent-based system to provide intelligent interactions with the control center personnel for SOHO. The basic approach that is being taken is to develop a sub-community of agents for each major subsystem of SOHO and to integrate these sub-communities into an overall SOHO community. Agents in all sub-communities will be capable of advanced understanding (deep reasoning) of the associated spacecraft subsystem.

  20. Expression of bactericidal/permeability-increasing protein requires C/EBP epsilon.

    PubMed

    Tanaka, Miyuki; Gombart, Adrian F; Koeffler, H Phillip; Shiohara, Masaaki

    2007-05-01

    Bactericidal/permeability-increasing protein (BPI) is a 55-kd cationic protein found mainly in neutrophil primary granules. BPI shows cytotoxicity against Gram-negative bacteria. In this study, we studied the role of a myeloid-specific transcription factor, CCAAT/enhancer binding protein epsilon (C/EBP epsilon), in the regulation of BPI gene expression. A patient with neutrophil-specific granule deficiency with a homozygous inactivating mutation in the CEBP epsilon gene showed severely impaired expression of both BPI messenger RNA (mRNA) and BPI protein. Both U937 and NB4 cells treated with 10-7 M all-trans retinoic acid (ATRA) for 6 days displayed increased levels of BPI protein and accompanying up-regulated C/EBP epsilon expression. Chromatin-immunoprecipitation analysis and electrophoretic mobility shift assays revealed binding of the C/EBP epsilon protein to the C/EBP-binding site in the BPI gene promoter. U937 cells stably transfected with a zinc-inducible C/EBP epsilon expression vector showed a 30-fold increase in BPI mRNA levels compared with cells transfected with control empty vector after culturing for 48 hours with 100 microM ZnSO4. BPI mRNA expression was severely reduced in the bone marrow of C/EBP epsilon-deficient mice compared with wild-type mice. Expression of BPI in human cord blood cells was increased by incubation with 10-7 MATRA for 48 hours. These results demonstrate the requirement for C/EBP epsilon in mediating BPI gene expression in myeloid cells in vitro and in vivo. PMID:17483073

  1. PA02.07. Rational scientific analysis of modern lifestyle as a nidana w.s.r to viruddha ahara

    PubMed Central

    Rashmi, B V

    2013-01-01

    Purpose: To understand the concept of viruddha ahara as a nidana in causation of diseases and to know its relavance in the present era. In the classics hitabhuk, mitabhuk, kshutabhuk, rhutubhuk are mentioned for maintaing the health of a person. Ahara that which vitiates dosha and which is antagonist to the dhatu in the body is known as viruddha ahara. Method: Classical literatures like bruhat trayi, laghu trayi, other texts and contemporary books are reviewed. The datas collected are analyzed scientifically with the help of contemporary science. Result: The eighteen types of viruddha ahara mentioned in the classics like desha, kala, agni, matra, etc. are understood with the help of examples like Agni viruddha In mandagni condition consuming guru snigdha ahara. In condition like dyspepsia where impairement in gastric, bile, pancreatic secretions are present, due to increased intake of mamsala ahara which are rich in amino acids and lipids impaires metabolism. Satmya viruddha Person satmya with katu ushna dravya sevana consuming increased swadu sheeta dravya. Persons habituated with rich spicy diet like pepper which causes irritation of gastric mucosa leading to increased gastric juice secretion, if increased intake of chilled soft drinks in such persons causes constriction of gastric mucosa leading to less gastric juice secretion. Avastha viruddha after nidra consuming kaphavardhka ahara like curd. After sleep basal metabolic rate of the body is reduced, curd which is rich in fats and carbohydrates requires more time for digestion. The rest types of viruddha ahara are analyzed and understood scientifically in the same manner as explained above. Conclusion: Ayurveda emphazises on nidana parivarjanameva chikitsa, understanding the nidana is prime important. Viruddha ahara affects the body metabolism and hence the concept of viruddha ahara is relevant to present era.

  2. HRIS technology development results and their implementation in future hyperspectral imagers

    NASA Astrophysics Data System (ADS)

    Harnisch, Bernd; Fabbricotti, Marino; Meynart, Roland; Kunkel, Bernd P.; Posselt, Winfried; Schmidt, Elke; Davancens, Robert; Donnadieu, Olivier; Saint-Pe, Olivier; Charlton, Dave E.; Sankus, Liz; Basile, Giuseppe; Calamei, L.; Schweizer, Juergen; Juranek, Hans J.; Sand, Rolf; Schwarzer, Horst H.; Suemnich, Karl-Heinz; Slater, Philip N.

    1997-12-01

    The recent developments within the ESA funded HRIS (high resolution imaging spectrometer) technology program -- aiming at an airborne demonstrator model -- yielded rather successful subsystem developments. HRIS is designed as a true pushbroom hyperspectral imager with comparatively high spatial and spectral resolution, covering the spectral range from 450 to 2350 nm. The main breadboard units, with a space-near design, are essentially: a TMA (three mirro anastigmat, Carl Zeiss) front optics, a dual path spectrometer optics (Officine Galileo) with a novel in-field spectral separation unit, a 2-D SWIR CMT detector array with a dedicated CMOS readout multiplexer (GEC Marconi IR, MATRA MSF for testing), the signal processing electronics (DSS), some calibration elements (DLR + DSS), and the extensive testing of all units. The paper presents the essential results per unit, with possible exception of the front optics (which may not be completed at the conference paper presentation yet), including derived further development efforts. Also, the remaining steps towards an airborne test mission are outlined, together with a brief description of the envisaged high-altitude aircraft. We hope that this paper may also stir some potential users of later airborne HRIS test missions over dedicated target areas. Positive responses would support ESA to pursue the program. The technology units development under the HRIS contract have turned out useful for follow-on instrument developments such as the ESA Explorer mission candidate PRISM (processes research by an imaging space mission). This leads to the conclusion that the achieved development results are a sound basis for future airborne and spaceborne hyperspectral imager developments in Europe. A brief survey of the current PRISM baseline concept is added to the paper.

  3. Teledetection passive et processus decisionnel a reference spatiale: Application a l'aquaculture en milieu marin

    NASA Astrophysics Data System (ADS)

    Habbane, Mohamed

    parametres sont compares deux a deux par rapport a la carte preliminaire regionale d'indices du potentiel maricole pour determiner leur poids relatif. La carte finale produite avec ces parametres du niveau 2 presente un secteur ou les indices du potentiel maricole sont de 0,5 a 0,75. Ce secteur longe la cote et epouse les isobathes de 10 a 30 m de profondeur. L'effet de la profondeur d'eau semble avoir jouer un role important. Le secteur de potentiel maricole de 0,25 a 0,5 est toujours present et couvre une superficie d'environ 426 kmsp2. L'etude necessitera toujours un suivi des conditions environnementales prevalant dans la region. Ce suivi peut etre effectue a l'aide d'un outil de vision aerospatiale (capteurs de teledetection) et d'analyse spatio-temporelle (SIG-PDRS). (Abstract shortened by UMI.)

  4. Cytogenetic biomonitoring of primary school children exposed to air pollutants: micronuclei analysis of buccal epithelial cells.

    PubMed

    Demircigil, Gonca Çakmak; Erdem, Onur; Gaga, Eftade O; Altuğ, Hicran; Demirel, Gülçin; Özden, Özlem; Arı, Akif; Örnektekin, Sermin; Döğeroğlu, Tuncay; van Doorn, Wim; Burgaz, Sema

    2014-01-01

    There is an increasing attempt in the world to determine the exposures of children to environmental chemicals. To analyze the genotoxic effect of air pollution, micronucleus (MN) assay was carried out in buccal epithelial cells (BECs) of children living in an urban city of Turkey. Children from two schools at urban-traffic and suburban sites were investigated in summer and winter seasons for the determination of BEC-MN frequency (per mille) and frequency of BEC with MN (per mille). The same children were also recruited for lung function measurements within a MATRA project ("Together Towards Clean Air in Eskisehir and Iskenderun") Measured NO2 and SO2 concentrations did not exceed the European Union (EU) limit levels either in urban-traffic or suburban regions. Higher O3 concentrations were measured in the suburban site especially in the summer period. Particulate matter (PM2.5 and PM10) levels which did not differ statistically between two regions were above the EU limits in general. Although BEC-MN frequencies of children living in the suburban sites were higher in general, the difference between two regions was not significant either in the summer or winter periods. BEC-MN frequencies of the urban-traffic children were found to be significantly higher in summer period (mean ± SD, 2.68 ± 1.99) when compared to winter period (1.64 ± 1.59; p = 0.004). On the other hand, no seasonality was observed for the suburban children. Similar results have been obtained in the BEC frequency with MN in our study. In summer, BEC-MN frequencies were significantly increased with the decrease in pulmonary function levels based on forced expiratory flow between 25 and 75% of vital capacity (FEF25-75%) levels (p < 0.05). As a conclusion, children living in urban-traffic and suburban areas in the city of Eskişehir exhibited similar genotoxicity. Seasonal variation in genotoxicity may be interpreted as relatively high ozone levels and increasing time spent at

  5. Three stages in the Late Paleozoic to Triassic magmatism of southwestern Gondwana, and the relationships with the volcanogenic events in coeval basins

    NASA Astrophysics Data System (ADS)

    Sato, Ana María; Llambías, Eduardo J.; Basei, Miguel A. S.; Castro, Carlos E.

    2015-11-01

    The intermediate to acid Choiyoi Magmatic Province is the most conspicuous feature along the Late Paleozic continental margin of southwestern Gondwana, and is generally regarded as the possible source for the widespread ash fall deposits interlayered with sedimentary sequences in the adjacent Gondwana basins. The Choiyoi magmatism is geologically constrained between the early Permian San Rafael orogenic phase and the Triassic extensional Huarpica phase in the region of Argentine Frontal Cordillera, Precordillera and San Rafael Block. In order to better assess the Choiyoi magmatism in Argentine Frontal Cordillera, we obtained 6 new LA-ICPMS U-Pb ages between 278.8 ± 3.4 Ma and 252.5 ± 1.9 Ma from plutonic rocks of the Colangüil Batholith and an associated volcanic rock. The global analysis of age data compiled from Chilean and Argentine Late Paleozoic to Triassic outcrops allows us to identify three stages of magmatism: (1) pre-Choiyoi orogenic magmatism, (2) Choiyoi magmatism (286-247 Ma), and (3) post-Choiyoi magmatism related to extensional tectonics. In the Choiyoi stage is there an eastward shift and expansion of the magmatism to the southeast, covering an extensive region that defines the Choiyoi magmatic province. On the basis of comparison with the ages from volcanogenic levels identified in the coeval Gondwana basins, we propose: (a) The pre-Choiyoi volcanism from the Paganzo basin (320-296 Ma) probably has a local source in addition to the Frontal Cordillera region. (b) The pre-Choiyoi and Choiyoi events identified in the Paraná basin (304-275 Ma) are likely to have their source in the Chilean Precordillera. (c) The early stage of the Choiyoi magmatism found in the Sauce Grande basin (284-281 Ma) may have come from the adjacent Las Matras to Chadileuvú blocks. (d) The pre-Choiyoi and Choiyoi events in the Karoo basins (302-253 Ma) include the longest Choiyoi interval, and as a whole bear the best resemblance to the age records along the Chilean and

  6. Mudflow Hazards in the Georgian Caucasus - Using Participatory Methods to Investigate Disaster Risk

    NASA Astrophysics Data System (ADS)

    Spanu, Valentina; McCall, Michael; Gaprindashvili, George

    2014-05-01

    The Caucasus form an extremely complex mountainous area of Georgia in terms of geology and the scale and frequency of natural disaster processes. These processes, especially mudflows, frequently result in considerable damage to the settlements, farmlands and infrastructure facilities. The occurrence intervals between mudflows are becoming significantly shorter, therefore the most populated areas and infrastucture need to be included in risk zones. This presentation reviews the case of the mudflow problem in Mleta village in the region of Dusheti where the mudflow risk is critical. The villages of Zemo Mleta (Higher Mleta) and Kvemo Mleta (Lower Mleta) are entirely surrounded by unstable slopes where mudslides, landslides and floods are often generated. These hazards occur at least twice per year and sometimes result in severe events. In 2006 and 2010 in Mleta village a very severe mudflow event occurred creating heavy damage. This paper focuses on the recognition of the importance of cooperating with the local communities affected by these disasters, in order to get useful information and local knowledge to apply to disaster prevention and management. In October 2010, the EU-financed MATRA Project (Institutional Capacity Building in Natural Disaster Risk Reduction) in Georgia included fieldworks in several locations. Particular attention was given to Mleta village in the Caucasus Mountains, where the activities focused on institutional capacity-building in disaster risk reduction, including modern spatial planning approaches and technologies and the development of risk communication strategies. Participatory methods of acquiring local knowledge from local communities reveal many advantages compared to traditional survey approaches for collecting data. In a participatory survey and planning approach, local authorities, experts and local communities are supposed to work together to provide useful information and eventually produce a plan for Disaster Risk Reduction

  7. J. Preston Layton 1919-1992: A guiding light in nuclear space power and propulsion

    NASA Astrophysics Data System (ADS)

    Brill, Yvonne C.

    New Space Transportation Systems; and chaired a projection of space activities into the 2000 to 2020 time period for the National Research Council. More recently, he designed environmental and communications satellite propulsion systems for MATRA Espace and RCA Astro-Electronics. Layton was very active in the American Institute of Aeronautics and Astronautics (AIAA) and the International Astronautical Federation (IAF). In 1985, he served as International Program Committee Chairman of the 35th International Congress in Stockholm. Layton was a Fellow, American Astronautical Society, Associate Fellow of the AIAA, and a Member of the International Academy of Astronautics.

  8. Marginal notes for a centenary

    NASA Astrophysics Data System (ADS)

    Balázs, Lajos G.

    2001-10-01

    Piszkesteto of the Matra mountain NE from Budapest. In 1982 the solar physics observatory joined the national observatory again and the Astronomical Research Institute of the Hungarian Academy of Sciences was formed. The change of the political system in 1990 removed the embargo for products of high technology and a significant modernization was carried out in the institute. The centenary is an important occasion for thinking on the main issues of strength keeping our institute in existence.

  9. Eco-monitoring of highly contaminated areas: historic heavy metal contamination in tree ring records

    NASA Astrophysics Data System (ADS)

    Baross, Norbert; Jordán, Győző; Albert, Julianna; Abdaal, Ahmed; Anton, Attila

    2014-05-01

    This study examines and compares tree rings of trees grown in a mining area highly contaminated with heavy metals. Tree rings offers an excellent opportunity for eco-monitoring polluted areas. Contamination dispersion from the source to the receptors can be studied in time and space. The sampled area is located in the eastern part of the Matra Mts. of the Inner-Carpathian calc-alkaline Volcanic Arc (Hungary) with abundant historical ore (Pb, Zn, Cu, etc.) mining in the area. Dense forests are composed of the most typical association of the Turkey oak (Quercus cerris). Scots pine (Pinus sylvestris), European black pine (Pinus nigra), oak (Quercus robur), beech (Fagus sylvatica), and hornbeam (Carpinus betulus) also occurs in the landscape. Sampled trees are located within a 1km radius of the abandoned historic ore mines. Sample sites were located above the old mines and waste rock heaps, under the waste rock heaps and on the floodplain of the Ilona Creek. The sampled trees were selected by the following criteria: the tree should be healthy, showing no signs of thunderbolt or diseases and having a minimum diameter of 50 cm. Samples were taken with a tree borer at the height of 150 cm. At the same time, soil samples were also taken near the trees in a 25 cm depth. Prior to laboratory analysis, the samples measured and air dried. Every fifth years tree ring was taken from the samples under microscope, working backwards from the most recent outer ring (2012, the year of the sampling). Samples were digested with a mixture of H2SO4 and H2O2m in Teflon vessels in a microwave unit. The samples were analyzed by ICP-OES instrument. The results were evaluated with statistical method. Results revealed a consistent picture showing distinct locations and years of the contamination history in the former mining area. Some elements are built into the trees more efficiently than other elements depending on mobility in the soil solution that is influenced by soil chemical properties

  10. PRISM (processes research by an imaging spaceborne mission) high-resolution hyperspectral imager for scientific land processes monitoring applications

    NASA Astrophysics Data System (ADS)

    Kunkel, Bernd P.; Blechinger, Fritz; Lutz, Reinhold; Posselt, Winfried; Del Bello, Umberto; Meynart, Roland; Lobb, Daniel R.; Saint-Pe, Olivier

    1995-11-01

    Dasa (Daimler-Benz Aerospace) currently is in charge of an ESA contract for the PRISM feasibility study, including MATRA MS/France and SIRA/UK. The main PRISM mission objectives are to monitor selected target areas with emphasis on bio-chemical stress analyses which are the subject of changes such as vegetation, in particular deforestation; further areas include glaciers, land/water boundaries, and similar features. The Dasa study team makes use of a similar ESA instrument currently the subject of dedicated subunits technology developments, the HRIS (high resolution imaging spectrometer), also lead by Dasa. Its main features and technology developments are covered in a survey. PRISM is covering most of the HRIS features, i.e., it will have an imaging spectrometer segment for the visible/NIR and the SWIR spectrum (450-2350 nm) as HRIS, but implements four MIR and TIR channels to provide surface temperature data, represented by linear detector arrays (essentially the features of another currently pursued ESA development program designated HRTIR). In a first study phase it also included a novel feature, a wide-angle two-axis pointing system for along- and across-track pointing in order to yield multi-directional reflectance data of dedicated targets, which turned out to be the greatest design driver in the instrument, it was omitted in the later phases. The geometric sampling interval is defined to 50 m (design goal) at 50 km swath. PRISM is currently studied in a feasibility study in a competitive way by two teams, one being lead by Dasa. At the time of the Symposium both studies are completed. The results of the Dasa team are presented. Since PRISM covers most of the HRIS mission it is rather likely that in the case of a successful concept feasibility proof (performance and technology wise), it may later replace the HRIS instrument. It is anticipated that a major part of the technology developments currently performed for HRIS will be utilized -- with some

  11. Three dimensional jet simulation in cross-flow using vortex method

    NASA Astrophysics Data System (ADS)

    Huberson, Serge; Rivoalen, Elie; Bratec, Hervé; Pinon, Grégory

    2003-11-01

    the total amount of vorticity any longer and could result in some kind of vorticity dissipation, specially at the jet boundaries. Both techniques can be extended to 3D flows. The second one has been used in the present simulations. The resulting method has been applied to three dimensional cross flow jets with different injection ratios. A persistent feature is that embedded conter-rotating vortex pairs form in such deflected jets, then persisting far downstream. These conter-rotating vortices have been observed in many experimentations [5,6,7,8] and in our numerical simulations as well. In the present work, the dynamics of such pairs have been investigated by means of extensive numerical simulations. References [1] P. Koumoutsakos. Inviscid axisymmetrization of an elliptical vortex. J. Comput. Phys. 138, pp 821-857, 1997. [2] A. Jolles and S. Huberson. Correction de l'erreur de projection dans les methodes particules-maillages. La Recherche Aerospatiale 4, pp 1-6, 1990. [3] G-H. Cottet and P. D. Koumoutsakos. Vortex Method : Theory and Practice. Cambridge University Press, UK, 2000. [4] A. Beaudoin, S. Huberson and E. Rivoalen. Simulation of anisotropic diffusion by means of a diffusion velocity method. J. Comput. Phys. 186, pp 325-348, 2003. [5] L. Cortelezzi and A. R. Karagozian. On the formation of the counter-rotating vortex pair in transverse jets. J. Fluid Mech. 446, pp 347-373, 2001. [6] Y. Kamotani and I. Greber. Experiments on a turbulent jet in a cross flow. AIAA J. 24, pp 1425-1429, 1972. [7] D. Crabb, D. F. G. Durao and J. H. Whitelaw. A round jet normal to a crossflow. ASME J. Fluids Eng. 103, pp 142-153, 1981. [8] R. M. Kelso, T. T. Lim and A. E. Perry. An experimental study of round jets in cross-flow. J. Fluid Mech. 306, pp 111-144, 1996.

  12. Europe is going to Mars

    NASA Astrophysics Data System (ADS)

    1999-06-01

    for future exploration. ESA is now able to afford Mars Express because it will be built more quickly and cheaply than any other comparable mission. It will be the first of the Agency's new flexible missions, based on maximum reuse of technology off-the-shelf and from other missions (the Rosetta cometary mission in this case). Mars Express will explore the extent to which innovative working practices, now made possible by the maturity of Europe's space industry, can cut mission costs and the time from concept to launch : a new kind of relationship with industrial partners is starting. "We are adopting a new approach to management by delegating to Matra Marconi Space (the prime contractor) responsibility for the whole project. This means we can reduce the ESA's management costs" says Bonnet. Despite the knock-down price, however, the future of Mars Express has hung in the balance because of the steady erosion of ESA's space science budget since 1995. Last November, the SPC said the mission could go ahead only if it could be afforded without affecting missions already approved, especially the FIRST infra-red observatory and the Planck mission to measure the cosmic microwave background. On 19/20 May, the SPC, which has the ultimate decision over the Agency's science missions, agreed that the level of resources allowed was just sufficient to allow Mars Express to go ahead. "To do such an ambitious mission for so little money is a challenge and we have decided to meet", says Balsiger.

  13. Recent Investigations, Development and Industrial Applications of RF-ion Thrusters in Germany

    NASA Astrophysics Data System (ADS)

    Bassner, H.; Killinger, R.; Kukies, R.; Mueller, J.

    2002-01-01

    lifetime tests. First applications were planned for North- South-Stationkeeping on communication satellites, which did not realise. A first test in space was performed on the European Retrievable Carrier EURECA in 1992 using Xenon as the propellant which did demonstrate that the thruster can produce 10 mN of thrust and does not disturb the satellite operation. In parallel thrusters with 26 and 35 cm discharge chamber diameter have been manufactured and tested up to a thrust level of 200 mN for an application to interplanetary missions. For a first application to North-South-Stationkeeping of a geostationary satellite the thrust level of the RIT 10 has been increased to 15 mN. 2 RIT - thrusters are installed on the Artemis satellite next to 2 EIT thrusters, produced by Matra-Marconi-Space (now Astrium GB), which are using the "Kaufmann" ionisation principle. The satellite has been launched in July 2001 and is now, after a degraded launch performance of Ariane V, on the way to its geostationary position, propelled by ion thrusters. In parallel to this activity Astrium has started the development of the 22 cm discharge chamber diameter thruster RIT -XT, which shall be used for future application to commercial satellites and to interplanetary missions. Thrust levels up to 200 mN at a specific impulse up to 4500 s can be achieved. Competitive prices can be achieved if more than 10 systems can be produced per year.

  14. Hipparcos: mission accomplished

    NASA Astrophysics Data System (ADS)

    1993-08-01

    prime contractor was Matra Marconi Spa

  15. HIPPARCOS satellite: Aeritalia involvement and system test activities and results

    NASA Astrophysics Data System (ADS)

    Strim, B.; Cugno, W.; Morsillo, G.

    In 1989 the European Space Agency is scheduled to launch HIPPARCOS on a 2.5-year mission that will revolutionize the state of astronomy. This is the first satellite to be dedicated to astrometry, a branch of astronomy that deals with the position of celestial objects and their motion in space. With an accuracy impossible to achieve from Earth, HIPPARCOS will make position, trigonometric parallax and proper motion measurements of some 100.000 pre-selected stars. The data will be used to calculate each star's distance and motion, providing astronomers with an unprecedented map of the heavens. In the end, the HIPPARCOS mission is expected to reveal surprisingly new insight into theories of stellar evolution, as well as into the nature of our galaxy and the universe. The program has been awarded to the MESH industrial consortium for definition, development and production. The French firm MATRA (prime contractor) and the AERITALIA SPACE SYSTEMS GROUP (major co-contractor) share program responsibility. AERITALIA is in charge of the spacecraft or "service module". This is the structural platform for the telescope payload and provides all subsystem services including thermal control, data handling, telecommunications, electrical power distribution, power generation, attitude and orbit control, and apogee kick motor. AERITALIA is responsible for the procurement of all spacecraft subsystems for which it directs the activities of a multinational team of subcontractors. In addition, it is in charge of the satellite's final assembly, integration and testing, as well as for the procurement of all ground support equipment for satellite testing. HIPPARCOS stands for HIgh Precision PARallax COllecting Satellite. Its name is also intended to honor the Greek astronomer Hipparchus (190-120 BC) who compiled the first star catalog and who first used trigonometric parallax to calculate the distance to the moon. (Parallax is the apparent shift in a celestial body's position in the sky

  16. European astronaut selected for the third Hubble Space Telescope

    NASA Astrophysics Data System (ADS)

    1998-08-01

    The STS-104 crew will rendezvous with the orbiting Hubble Space Telescope, which is the size of a city bus, capture it using the Shuttle's Canadian robot arm and secure it in Columbia's payload bay. Then, working in teams of two, the four astronauts will leave the Shuttle's pressurised cabin and venture into the payload bay, performing a variety of tasks that will improve the productivity and reliability of the telescope. The four astronauts will perform a series of six "extravehicular" activities in the open space environment. Such activities are commonly called spacewalks, but this term does little justice to the considerable physical and mental efforts that astronauts need to make in doing the very demanding work involved. The Shuttle commander and pilot for this flight have not yet been appointed, but the four designated mission specialists begin training for the STS-104 mission immediately. "The ambitious nature of this mission, with its six spacewalks, made it important for the payload crew to begin training as early as possible," said David C. Leestma, NASA Director of Flight Crew Operations at the Johnson Space Center in Houston, to which Claude Nicollier is on resident assignment from ESA's European Astronaut Centre in Cologne, Germany, the home base of the European astronaut corps. The Hubble Space Telescope was launched into orbit in April 1990. It is one of the most capable optical telescopes available to astronomers today, producing images and spectral observations at the forefront of astronomy. The European Space Agency contributed a 15 share to the development of Hubble. One of the five scientific instruments on board, the Faint Object Camera, was built by a European industrial consortium made up of British Aerospace, Dornier and Matra under a contract with the European Space Agency. The solar arrays which provide Hubble with electrical power were manufactured by British Aerospace and Dornier. In its eight years of operation, the telescope has not

  17. Prestigious award for SOHO

    NASA Astrophysics Data System (ADS)

    2003-09-01

    founded in 1960, in Stockholm, Sweden, to foster the development of astronautics for peaceful purposes. Its current membership includes individuals from 68 countries. SOHO is a project of international cooperation between ESA and NASA to study the Sun, from its deep core to the outer corona, and the solar wind. Fourteen European countries, led by the European Space Agency and prime contractor Astrium (formerly Matra-Marconi), built the SOHO spacecraft. It carries twelve instruments (nine European-led and three American-led) and was launched by an NASA's Atlas II-AS rocket on 2 December 1995. Mission operations are coordinated at NASA's Goddard Space Flight Centre. The spacecraft was designed for a two-year-mission but its spectacular success has led to two extensions of the mission, the first until 2003, and then again until March 2007.

  18. SOHO hunts elusive solar prey

    NASA Astrophysics Data System (ADS)

    1995-10-01

    SOHO will carry twelve sophisticated telescopes and other instruments, developed in record time by twelve international consortia involving scientific institutes in 15 countries. Roger M. Bonnet, the Director of ESA’s Scientific Programme said: "Each one of these instruments by itself would be enough to make major breakthroughs in our understanding of the Sun. But what makes SOHO such an exciting mission is that we will operate all the instruments together and find possible links between various phenomena at different levels in the volume of the Sun and in the interplanetary medium". Four years of intense efforts by space engineering teams in ESA and across Europe, under the leadership of the prime contractor Matra Marconi Space of Toulouse, France, have fulflled the dream of scientists who wished to build a superb space observatory for examining the Sun. SOHO, together with the four-spacecraft Cluster mission - which will explore near-Earth space, forms the Solar-Terrestrial Science Programme, the first cornerstone in ESA’s long-term programme 'Horizon 2000'. No night time for SOHO Instead of being placed in orbit around the Earth, SOHO will be lofted to a position where the gravitational pulls of the Earth and the Sun cancel each other out exactly, at 1.5 million kilometres sunward from the Earth. This is known in astronomy as the inner Lagrangian point after the French mathematician, Joseph Louis Lagrange, who first calculated its position near the end of the eighteenth century. SOHO will fly in an elliptical, or "halo" orbit around the Lagrangian point, with an orbit radius of about 600,000 kilometres, allowing the spacecraft to experience perpetual day. It will have a continuous, uninterrupted view of the Sun for twenty four hours of the day, all three hundred and sixty five days of the year, producing an extraordinary amount of data. All previous solar observatories have either been on the Earth or in orbit around our planet. On the Earth, telescopes are

  19. Hipparcos to deliver its final results catalogue soon

    NASA Astrophysics Data System (ADS)

    1995-10-01

    itself a time so inconceivably long that only a few revolutions of our Galaxy have been completed since its formation - dinosaurs ruling our planet less than one quarter of a revolution ago. Hipparcos has measured the details of this cosmic procession, and will allow a clear disentangling of the motions of the individual stars ; which lie relatively close to our Sun? which are massive highly-luminous stars at great distances from it ? which are moving in an orbit close to our Sun's ? and which are racing away from it hundreds of times faster than the speed of sound ? After eight years in the planning and construction stages, Matra Marconi Space, Alenia Spazio, and their 30 or so high-technology industrial partners delivered the Hipparcos satellite to ESA, on schedule and within cost. With the exception of its boost motor, the satellite and all its instruments functioned flawlessly, and indeed surpassed all expectations - in spite of he harsh environment that it was subjected to in its unintended orbit. The Matra Marconi Space Project Manager, Michel Bouffard, expressed his own satisfaction with the Hipparcos Catalogue completion, and remarked hat "the Hipparcos project is definitely one of the best examples of intense and fruitful collaboration between ESA, industry and scientist". A few more months work will be required before the Hipparcos Catalogue, and its companion Tycho Catalogue of more than a million stars, can be released by the European Space Agency. "We have to fit into the completed catalogue all of the double stars, and all of the magnitude measurements, that have been acquired", explained Dr Michael Perryman, ESA's scientist working with the European scientific teams. "But the schedule for this has now been drawn up " he added. Scientists who formulated parts of the satellite's observing programme, and who were involved in the analysis of the satellite data, will be given the first opportunity to try to understand what the data mean, from an astronomical

  20. First 3D view of solar eruptions

    NASA Astrophysics Data System (ADS)

    2004-07-01

    loops, rather than a bubble or rope-like structure. Although this technique had been independently developed previously to study relatively static structures in the solar atmosphere during eclipses, this is the first time that it is applied to fast moving CMEs. Moran and Davila believe that their method will complement data from the upcoming NASA’s Solar Terrestrial Relations Observatory (STEREO) mission, scheduled for launch in February 2006. STEREO will use two widely separated spacecraft to construct 3D views of CMEs by combining images from the different vantage points of the twin spacecraft. Commenting on this result, Bernhard Fleck, SOHO Project Scientist at ESA, said: "These are really amazing images. Once again scientists have come up with a clever idea for analysing SOHO data in ways that were not even dreamt of when the mission was designed." Movie: http://esamultimedia.esa.int/images/spcs/soho/soho20040702.mpg 3 stills from the movie http://esamultimedia.esa.int/images/spcs/soho/soho20040702c.tiff http://esamultimedia.esa.int/images/spcs/soho/soho20040702d.tiff http://esamultimedia.esa.int/images/spcs/soho/soho20040702e.tiff This movie shows a 3D rendering of the data in Figure 2. It starts out viewing the Sun from SOHO's perspective, then rotates the scene to view the data from the side, and finally from the top. Note that one distinct feature shown at about 11 o'clock in Figure 2 panel a has been left out of the movie, because it is a static structure and not a part of the CME. Notes to Editors: This new result by T. Moran and J. Davila is published in today’s issue of the magazine Science. More about SOHO SOHO is a project of international co-operation between ESA and NASA to study the Sun, from its deep core to the outer corona, and the solar wind. Fourteen European countries, led by the European Space Agency and prime contractor Astrium (formerly Matra-Marconi), built the SOHO spacecraft. It carries twelve instruments (nine European-led and three

  1. Hipparcos: mission accomplished

    NASA Astrophysics Data System (ADS)

    1993-08-01

    prime contractor was Matra Marconi Space (France), also responsible for the payload and the on-board software development: with Alenia (Italy) responsible for the procurement of the spacecraft, as well as integration and testing of the complete satellite. A total of 35 European firms were involved in the satellite construction. The satellite was launched by Ariane 4 on 8 August 1989. Hipparcos was named after the pioneer Greek astronomer Hipparchus who compiled a detailed star map in around 120 BC and, by comparing it with observations made by his predecessors, established that the Earth's rotation axis slowly changed its direction in space. The Hipparcos satellite carried out its measurements in a highly elliptical 10-hour orbit, ranging between 500 km and 36,000 km above the Earth's surface, resulting from non-functioning of the satellite's apogee boost motor shortly after launch. A redesign of the on-board attitude control system, and the addition of two more ground stations into the control network, nevertheless allowed ESA's operations team at ESOC (Darmstadt, Germany) to operate the satellite with close to full efficiency. For the 20-strong operations team at ESOC and the ground station teams in Perth (Australia), Goldstone (USA) and Kourou (French Guiana) the mission has been highly interesting, challenging and very demanding. "After more than three years of excellent performance, underlining the remarkable quality of the satellite's design and construction, it was showing its age in several areas" said Dietmar Heger, ESOC's Spacecraft Operations Manager for Hipparcos. "The orbit was subjected to very significant levels of high energy electron and proton radiation, much higher than those expected in its intended geostationary orbit. We cannot be surprised or disappointed that the satellite has finally ceased to function" he said. The scientific activities associated with the Hipparcos mission are under the responsibility of four European scientific teams

  2. XMM-Newton detects X-ray 'solar cycle' in distant star

    NASA Astrophysics Data System (ADS)

    2004-05-01

    the European Space Agency and prime contractor Astrium (formerly Matra-Marconi), built the SOHO spacecraft. It carries twelve instruments (nine European-led and three American-led) and was launched by an NASA's Atlas II-AS rocket on 2 December 1995. Mission operations are coordinated at NASA's Goddard Space Flight Centre. The spacecraft was designed for a two-year mission but its spectacular success has led to two extensions of the mission, the first until 2003, and then again until March 2007. More information on SOHO can be found at: http://www.esa.int/esaSC/SEMJFH374OD_1_spk.html

  3. Hubble Space Telescope: The Telescope, the Observations & the Servicing Mission

    NASA Astrophysics Data System (ADS)

    1999-11-01

    the way for other space-based observatories. How the mission was named Hubble Space Telescope is named after Edwin Powell Hubble (1889-1953), who was one of the great pioneers of modern astronomy. Industrial Involvement The ESA contribution to HST included the Solar Panels and the Faint Object Camera (FOC). Prime contractors for the FOC were Dornier (now DaimlerChrysler Aerospace, Germany), and Matra (France); for the Solar Panels British Aerospace (UK). Launch date: April 25, 1990 Launcher: Space Shuttle Discovery (STS-31) Launch mass: 11 110 kg Dimensions Length: 15.9 m, diameter: 4.2 m. In addition two solar panels each 2.4 x 12.1 m. Payload (current) A 2.4 m f/24 Ritchey-Chretien telescope with four main instruments, currently WFPC2, STIS, NICMOS and FOC. In addition the three fine-guidance sensors are used for astrometric observations (positional astronomy). WFPC2 - Wide Field/Planetary Camera 2 is an electronic camera working at two magnifications. It has four CCD detectors with 800 x 800 pixels. One of these (called Planetary Camera) has a higher resolution (<0.1 arcsecond). STIS - Space Telescope Imaging Spectrograph uses so-called MAMAs and CCDs to provide images and spectra. It is sensitive to a wide range of light from UV to Infrared. NICMOS - Near-Infrared Camera and Multi-Object Spectrometer provides images and spectra in the infrared. NICMOS uses cooled HgCdTe detectors. Currently NICMOS is dormant and awaits a new cooler to be provided during Servicing Mission 3B. FOC - Faint Object Camera - a very high resolution camera built by ESA. FOC is no longer in use and will be replaced by the new Advanced Camera for Surveys (ACS) during Servicing Mission 3B. Orbit Circular, 593 km with a 28.5 degree inclination. Operations Science operations are co-ordinated and conducted by the Space Telescope Science Institute (STScI) in Baltimore. Overall management of daily on-orbit operations is carried out by NASA's Goddard Space Flight Center (GSFC) in Greenbelt. Ground

  4. European astronaut selected for the third Hubble Space Telescope

    NASA Astrophysics Data System (ADS)

    1998-08-01

    The STS-104 crew will rendezvous with the orbiting Hubble Space Telescope, which is the size of a city bus, capture it using the Shuttle's Canadian robot arm and secure it in Columbia's payload bay. Then, working in teams of two, the four astronauts will leave the Shuttle's pressurised cabin and venture into the payload bay, performing a variety of tasks that will improve the productivity and reliability of the telescope. The four astronauts will perform a series of six "extravehicular" activities in the open space environment. Such activities are commonly called spacewalks, but this term does little justice to the considerable physical and mental efforts that astronauts need to make in doing the very demanding work involved. The Shuttle commander and pilot for this flight have not yet been appointed, but the four designated mission specialists begin training for the STS-104 mission immediately. "The ambitious nature of this mission, with its six spacewalks, made it important for the payload crew to begin training as early as possible," said David C. Leestma, NASA Director of Flight Crew Operations at the Johnson Space Center in Houston, to which Claude Nicollier is on resident assignment from ESA's European Astronaut Centre in Cologne, Germany, the home base of the European astronaut corps. The Hubble Space Telescope was launched into orbit in April 1990. It is one of the most capable optical telescopes available to astronomers today, producing images and spectral observations at the forefront of astronomy. The European Space Agency contributed a 15 share to the development of Hubble. One of the five scientific instruments on board, the Faint Object Camera, was built by a European industrial consortium made up of British Aerospace, Dornier and Matra under a contract with the European Space Agency. The solar arrays which provide Hubble with electrical power were manufactured by British Aerospace and Dornier. In its eight years of operation, the telescope has not

  5. SOHO hunts elusive solar prey

    NASA Astrophysics Data System (ADS)

    1995-10-01

    SOHO will carry twelve sophisticated telescopes and other instruments, developed in record time by twelve international consortia involving scientific institutes in 15 countries. Roger M. Bonnet, the Director of ESA’s Scientific Programme said: "Each one of these instruments by itself would be enough to make major breakthroughs in our understanding of the Sun. But what makes SOHO such an exciting mission is that we will operate all the instruments together and find possible links between various phenomena at different levels in the volume of the Sun and in the interplanetary medium". Four years of intense efforts by space engineering teams in ESA and across Europe, under the leadership of the prime contractor Matra Marconi Space of Toulouse, France, have fulflled the dream of scientists who wished to build a superb space observatory for examining the Sun. SOHO, together with the four-spacecraft Cluster mission - which will explore near-Earth space, forms the Solar-Terrestrial Science Programme, the first cornerstone in ESA’s long-term programme 'Horizon 2000'. No night time for SOHO Instead of being placed in orbit around the Earth, SOHO will be lofted to a position where the gravitational pulls of the Earth and the Sun cancel each other out exactly, at 1.5 million kilometres sunward from the Earth. This is known in astronomy as the inner Lagrangian point after the French mathematician, Joseph Louis Lagrange, who first calculated its position near the end of the eighteenth century. SOHO will fly in an elliptical, or "halo" orbit around the Lagrangian point, with an orbit radius of about 600,000 kilometres, allowing the spacecraft to experience perpetual day. It will have a continuous, uninterrupted view of the Sun for twenty four hours of the day, all three hundred and sixty five days of the year, producing an extraordinary amount of data. All previous solar observatories have either been on the Earth or in orbit around our planet. On the Earth, telescopes are