Job Satisfaction, Organization Commitment and Retention in the NOAA (national Oceanic Atmospheric Administration) Corps

DTIC Science & Technology

1986-12-01

CONDUCT OF THE STUDY 21 B. THE QUESTIONNAIRE 21 C . THE SAMPLE 22 D. INSTRUMENTATION 23 E . ANALYSIS 23 F. PROCESSING THE RAW DATA 25 1. Crosstabulation 25...and Personality, 2d ed., pp. 35-58, Harper and Row, 1970. 2. Alderfer , C . P.. "An Empirical Test of a New Theory of Human Needs," Organizational...of Business Administration. 1965. 6. Hackman, R . J. and Lawier. E . E ., Journal of Applied Psvchoiogy. v. 55, no. 3. pp. 259-285. 1971. 7. Blood. M. R

What is that mysterious booming sound?

USGS Publications Warehouse

Hill, David P.

2011-01-01

The residents of coastal North Carolina are occasionally treated to sequences of booming sounds of unknown origin. The sounds are often energetic enough to rattle windows and doors. A recent sequence occurred in early January 2011 during clear weather with no evidence of local thunder storms. Queries by a local reporter (Colin Hackman of the NBC affiliate WETC in Wilmington, North Carolina, personal communication 2011) seemed to eliminate common anthropogenic sources such as sonic booms or quarry blasts. So the commonly asked question, “What's making these booming sounds?” remained (and remains) unanswered.

Impact Craters: Size-Dependent Degration Rates

NASA Astrophysics Data System (ADS)

Ravi, S.; Mahanti, P.; Meyer, H. M.; Robinson, M. S.

2017-12-01

From superposition relations, Shoemaker and Hackman (1) devised the lunar geologic timescale with Copernican and Eratosthenian as the most recent periods. Classifying craters into the two periods is key to understanding impactor flux and regolith maturation rates over the last 3 Ga. Both Copernican and Eratosthenian craters exhibit crisp morphologies (sharp rims, steep slopes), however, only the former exhibit high reflectance rays and ejecta (1). Based on the Optical Maturity Parameter (OMAT; 2), Grier et al. (3) classified 50 fresh craters (D >20 km) into 3 categories - young (OMAT >0.22), intermediate, and old (OMAT <0.16). In our previous work, Copernican craters (D > 10) were identified (4) from a catalogue of 11,875 craters (5). In this work; we compare two size ranges (D: 5 km - 10 km and 10 km to 15 km) of 177 Copernican craters based on the average OMAT, measured near the crater rim (3). OMAT is measured at the crater rim (as opposed to further away from the crater) to minimize the influence of spatial variation of OMAT (6) in our investigation. We found that OMAT values are typically lower for smaller craters (5km < D < 10km) in comparison to larger craters (10km < D < 15km). However, when compared against morphological freshness (as determined by d/D for simpler craters), the smaller craters were fresher (higher d/D value). Since the OMAT value decreases with age, craters with higher d/D value (morphologically fresher) should have higher OMAT, but this is not the case. We propose that quicker loss of OMAT (over time) for smaller craters compared to decrease in d/D with crater ageing, is responsible for the observed decreased OMAT for smaller craters. (1) Shoemaker and Hackman, 1962 (2) Lucey et al., 2000 (3) Grier et al., 2001 (4) Ravi et al., 2016 (5) Reinhold et al., 2015 (6) Mahanti et al., 2016

Diversity and leadership.

PubMed

Chin, Jean Lau; Sanchez-Hucles, Janis

2007-09-01

Comments on the six articles contained in the special issue of the American Psychologist (January 2007) devoted to leadership, written by W. Bennis; S. J. Zaccaro; V. H. Vroom and A. G. Yago; B. J. Avolio; R. J. Sternberg; and R. J. Hackman and R. Wageman. The current authors express concern that the special issue failed to include attention to issues of diversity and intersecting identities as they pertain to leadership. A Special Issue Part II on Diversity and Leadership is being proposed to (a) advance new models of leadership, (b) expand on existing leadership theories, and (c) incorporate diversity and multiple identities in the formulation of more inclusive leadership research and theory. The goal of this special issue will be to revise our theories of leadership and our understanding of effective leadership to include gender, racial/ethnic minority status, sexual orientation, and disability status.

Patterns of work attitudes: A neural network approach

NASA Astrophysics Data System (ADS)

Mengov, George D.; Zinovieva, Irina L.; Sotirov, George R.

2000-05-01

In this paper we introduce a neural networks based approach to analyzing empirical data and models from work and organizational psychology (WOP), and suggest possible implications for the practice of managers and business consultants. With this method it becomes possible to have quantitative answers to a bunch of questions like: What are the characteristics of an organization in terms of its employees' motivation? What distinct attitudes towards the work exist? Which pattern is most desirable from the standpoint of productivity and professional achievement? What will be the dynamics of behavior as quantified by our method, during an ongoing organizational change or consultancy intervention? Etc. Our investigation is founded on the theoretical achievements of Maslow (1954, 1970) in human motivation, and of Hackman & Oldham (1975, 1980) in job diagnostics, and applies the mathematical algorithm of the dARTMAP variation (Carpenter et al., 1998) of the Adaptive Resonance Theory (ART) neural networks introduced by Grossberg (1976). We exploit the ART capabilities to visualize the knowledge accumulated in the network's long-term memory in order to interpret the findings in organizational research.

Beyond the individual victim: multilevel consequences of abusive supervision in teams.

PubMed

Farh, Crystal I C; Chen, Zhijun

2014-11-01

We conceptualize a multilevel framework that examines the manifestation of abusive supervision in team settings and its implications for the team and individual members. Drawing on Hackman's (1992) typology of ambient and discretionary team stimuli, our model features team-level abusive supervision (the average level of abuse reported by team members) and individual-level abusive supervision as simultaneous and interacting forces. We further draw on team-relevant theories of social influence to delineate two proximal outcomes of abuse-members' organization-based self-esteem (OBSE) at the individual level and relationship conflict at the team level-that channel the independent and interactive effects of individual- and team-level abuse onto team members' voice, team-role performance, and turnover intentions. Results from a field study and a scenario study provided support for these multilevel pathways. We conclude that abusive supervision in team settings holds toxic consequences for the team and individual, and offer practical implications as well as suggestions for future research on abusive supervision as a multilevel phenomenon. (PsycINFO Database Record (c) 2014 APA, all rights reserved).

A comparison of situational and dispositional predictors of perceptions of organizational politics.

PubMed

O'Connor, W E; Morrison, T G

2001-05-01

The present study is an investigation of situational and dispositional characteristics that may predispose an employee to perceive his or her organization as political. Participants were 501 regular members, civilian members, and public servants of the Royal Canadian Mounted Police. Measures used for this research were the Formalization Scale (G. R. Oldham & J. R. Hackman, 1981), the Job Autonomy Scale (H. P. Sims, A. D. Szilagyi, & R. T. Keller, 1976), the Mach IV (A. Zook & G. J. Sipps, 1986), the Dominance subscale from the Manifest Needs Questionnaire (R. M. Steers & D. N. Braunstein, 1976), the Survey of Organizational Climate (J. C. Taylor & D. G. Bowers, 1972), the Perceptions of Organizational Politics Scale (G. R. Ferris & K. M. Kacmar, 1992), and the Work Locus of Control Scale (P. E. Spector, 1988). Results indicated that organizational climate, formalization, work locus of control (both internal and external measures), and Machiavellianism were significant predictors, accounting for 52% of the variance in participants' perceptions of organizational politics. Limitations of the present study and directions for future research are outlined.

The Secrets of Great Teamwork.

PubMed

Haas, Martine; Mortensen, Mark

2016-06-01

Over the years, as teams have grown more diverse, dispersed, digital, and dynamic, collaboration has become more complex. But though teams face new challenges, their success still depends on a core set of fundamentals. As J. Richard Hackman, who began researching teams in the 1970s, discovered, what matters most isn't the personalities or behavior of the team members; it's whether a team has a compelling direction, a strong structure, and a supportive context. In their own research, Haas and Mortensen have found that teams need those three "enabling conditions" now more than ever. But their work also revealed that today's teams are especially prone to two corrosive problems: "us versus them" thinking and incomplete information. Overcoming those pitfalls requires a new enabling condition: a shared mindset. This article details what team leaders should do to establish the four foundations for success. For instance, to promote a shared mindset, leaders should foster a common identity and common understanding among team members, with techniques such as "structured unstructured time." The authors also describe how to evaluate a team's effectiveness, providing an assessment leaders can take to see what's working and where there's room for improvement.

Employees' Job Satisfaction: A Test of the Job Characteristics Model Among Social Work Practitioners.

PubMed

Blanz, Mathias

2017-01-01

The present article describes an investigation of the Job Characteristics Model (JCM) by Hackman and Oldham (1976) for the prediction of job satisfaction of employees in social work areas. While there is considerable evidence for the JCM with respect to profit-oriented organizations, it was tested whether it can also be applied to the non-profit sector. The present study surveyed 734 holders of jobs in social work in Germany in order to assess their job satisfaction and the core variables of the JCM (i.e., the five job characteristics and the three psychological states). Regression and mediation analyses were used to examine the relations between these variables. The results showed that the expected relations were remarkably in accordance with the findings from the for-profit sector. All model variables correlated positively with job satisfaction, with the psychological states showing higher coefficients than the job characteristics. In addition, the influence of job characteristics on job satisfaction was significantly mediated through the psychological states. These findings were supported by a replication study. Implications of the JCM for practice, in particular for assessment and interventions in social work organizations, are discussed.

Redistribution of radioactive mine wastes by slushflows and other processes in small mountain river basin in Russian Subarctics

NASA Astrophysics Data System (ADS)

Garankina, Ekaterina; Belyaev, Vladimir; Ivanov, Maxim; Romanenko, Fedor; Gurinov, Artem; Tulyakov, Egor; Kuzmenkova, Natalia

2017-04-01

The Khibiny Mountains located in central part of the Kola Peninsula (Northern European Russia) are characterized by harsh climatic conditions and frequent occurrence of hazardous or even catastrophic processes. Most widespread of those are snow avalanches taking place every year and slushflows with average recurrence interval of about 10 years. The latter represent specific type of hyperconcentrated gravitational flow of oversaturated mixture of snow and water (20 to 70%) with relatively low sediment concentration (up to 10-15%). Most often slushflows form during spring snowmelt in small mountainous basins (in most cases up to 3-6 km2) with thick snowpacks or snow dams caused by avalanches in stream channels. Typically observed volumes vary in a range of 20000-40000 m3, while rare catastrophic events can reach 200000-500000 m3. Kinetic energy of frontal wave that can be up to several meters high and concentrates most of the largest debris is most likely lower than that of typical debris flow of similar size, mainly because of much lower slushflow density (900-1200 kg m-3). Nevertheless, rare occasional measurements of front wave velocity gave dramatic values of 20-25 m s-1 maximum. Such characteristics combined with unpredictable rapid formation make slushflows definitely hazardous processes that can cause serious damage to industrial and residential infrastructure as well as injuries or causalities to people. For example, the Khibiny Mountains have at least 200 locations where formation of slushflows was detected at least ones over the last 50 years. Widespread constructions and communications associated with intensive exploration of mineral resources as well as growing interest to the area as touristic attraction for skiing and other wintertime activities make the Khibiny Mountains an area of serious geomorphic hazards associated with slushflows. In this particular study, we considered the Hackman basin where heavy debris flows occur at least ones per several

Inelastic Proton Scattering on 21Na in Inverse Kinematics

NASA Astrophysics Data System (ADS)

Austin, Roby

2009-10-01

R.A.E. Austin, R. Kanungo, S. Reeve, Saint Mary's University; D.G. Jenkins, C.Aa.Diget, A. Robinson, A.G. Tuff, O. Roberts, University of York, UK; P.J. Woods, T. Davinson, G. J. Lotay, University of Edinburgh; C.-Y. Wu, Lawrence Livermore National Laboratory; H. Al Falou, G.C. Ball, M. Djongolov, A. Garnsworthy, G. Hackman, J.N. Orce, C.J. Pearson, S. Triambak, S.J. Williams, TRIUMF; C. Andreiou, D.S. Cross, N. Galinski, R. Kshetri, Simon Fraser University; C. Sumithrarachchi, M.A. Schumaker, University of Guelph; M.P. Jones, S.V. Rigby, University of Liverpool; D. Cline, A. Hayes, University of Rochester; T.E. Drake, University of Toronto; We describe an experiment and associated technique [1] to measure resonances of interest in astrophysical reactions. At the TRIUMF ISAC-II radioactive beam accelerator facility in Canada, particles inelastically scattered in inverse kinematics are detected with Bambino, a δE-E silicon telescope spanning 15-40 degrees in the lab. We use the TIGRESS to detect gamma rays in coincidence with the charged particles to cleanly select inelastic scattering events. We measured resonances above the alpha threshold in ^22Mg of relevance to the rate of break-out from the hot-CNO cycle via the reaction ^ 18Ne(α,p)^21Na. [1] PJ Woods et al. Rex-ISOLDE proposal 424 Cern (2003).

Checklist of the Diptera (Insecta) of Finland: an introduction and a summary of results

PubMed Central

Kahanpää, Jere

2014-01-01

Abstract Nearly thirty-five years have passed since Hackman published his “Check list of the Finnish Diptera” (1980). The number of true flies (Diptera) known from Finland has increased by more than two thousand species since then. At the same time, hundreds of erroneous records have been recognized and purged from the checklist. ZooKeys issue 441 provides a new checklist of the Diptera species of the Republic of Finland. This introductory paper presents the rationale behind the project, provides technical documentation on the checklist format and sources used, and summarizes the results. The remaining papers in this issue cover one or more Diptera families in detail. Two electronic appendices are provided: supporting data (additional references to first published records and the previous checklist) and a complete list of Finnish Diptera taxa in Darwin Core compliant format for easy computer access and processing. The new checklist records 6920 fly species from Finland, 2932 belonging to the nematoceran or lower flies and 3989 to the suborder Brachycera. The changes since 1980 are most prominent in the Lower Diptera. For example, more than 400 non-biting midges (Chironomidae) have been added since 1980, and the number of moth flies (Psychodidae) known from Finland has more than tripled. Among the larger families, large increases in known Finnish species are also seen in Cecidomyiidae (161% increase), Pipunculidae (98%), and Chironomidae (90%). PMID:25337004

Map showing general availability of ground water in the Kaiparowits coal-basin area, Utah

USGS Publications Warehouse

Price, Don

1977-01-01

This is one of a series of maps that describe the geology and related natural resources in the Kaiparowits coal-basin area. This map is based partly on records of water wells, springs, and coal and petroleum exploration holes, partly on unpublished reports of field evaluations of prospective stock-water well sites by personnel of the U.S. Geological Survey, and partly on a 6-day field reconnaissance by the writer in parts of the mapped area.Most of the data used to compile this map were collected by the U.S. Geological Survey in cooperation with State, local, and other Federal agencies. Published sources of data included Phoenix (1963), Iorns, Hembree, and Phoenix (1964), Cooley (1965), Feltis (1966), Goode (1966, 1969), and the final environmental impact statement for the proposed Kaiparowits power project (U.S. Bureau of Land Management, 1976).Few data about the availability or depth of ground water could be obtained for large areas in the Kaiparowits coal basin. In those areas, expected yields of individual wells are inferred from the geology as compiled by Stokes (1964) and Hackman and Wyant (1973), and depths of ground water in wells are inferred largely from the local topography.El Paso Natural Gas Co., Resources Co., Kaiser Engineers, and Southern California Edison Co. provided specific information regarding the availability and depth of ground water in their exploratory holes on the Kaiparowits Plateau. The cooperation of those firms is gratefully acknowledged.

[Perceptions of nursing service managers in the South African Military Health Service on their level of motivation].

PubMed

Fischer, A; Muller, M

2000-12-01

The process of transformation in the South African Military Health Services, has influenced the nursing service managers' level of motivation and the following research question is applicable: what are the perceptions of the nursing service managers within the South African Military Health Services on their level of motivation? The purpose with this study was to explore and describe the perceptions of nursing service managers on their level of motivation within these health services. A qualitative research design was utilized and four focus group interviews were conducted with 33 nursing service managers country wide. The transcribed interviews were exposed to a content analysis. The results confirm that the level of motivation amongst these nursing service managers is low. The demotivators relate mainly to the following: inadequate acknowledgement, job insecurity in relation to the future, problems with the process of integration, transformation and rationalization, problems with management, many labour related issues, poor/inadequate communication, inadequate support, increased work load, poor physical environment, negative publicity and poor self motivation. Although there were a few motivators identified, they were of less importance. These results were interpreted within Herzberg's motivation theory to identify the hygiene/maintenance factors and to assess whether the important motivators were in place. During any process of change, and/or when the level of motivation amongst employees is low, it is important to adequately manage the environment (hygiene/maintenance factors within the Herzberg theory). But it is even more important to ensure that the motivators are in place or to intensify them. It is therefore recommended that a motivation strategy, based on the Herzberg theory as well as the Hackman-Oldham job enrichment model, be developed, implemented and evaluated.

The Gateway from Near into Remote Oceania: New Insights from Genome-Wide Data

PubMed Central

Pugach, Irina; Duggan, Ana T; Merriwether, D Andrew; Friedlaender, Françoise R; Friedlaender, Jonathan S; Stoneking, Mark

2018-01-01

Abstract A widely accepted two-wave scenario of human settlement of Oceania involves the first out-of-Africa migration circa 50,000 years ago (ya), and the more recent Austronesian expansion, which reached the Bismarck Archipelago by 3,450 ya. Whereas earlier genetic studies provided evidence for extensive sex-biased admixture between the incoming and the indigenous populations, some archaeological, linguistic, and genetic evidence indicates a more complicated picture of settlement. To study regional variation in Oceania in more detail, we have compiled a genome-wide data set of 823 individuals from 72 populations (including 50 populations from Oceania) and over 620,000 autosomal single nucleotide polymorphisms (SNPs). We show that the initial dispersal of people from the Bismarck Archipelago into Remote Oceania occurred in a “leapfrog” fashion, completely by-passing the main chain of the Solomon Islands, and that the colonization of the Solomon Islands proceeded in a bidirectional manner. Our results also support a divergence between western and eastern Solomons, in agreement with the sharp linguistic divide known as the Tryon–Hackman line. We also report substantial post-Austronesian gene flow across the Solomons. In particular, Santa Cruz (in Remote Oceania) exhibits extraordinarily high levels of Papuan ancestry that cannot be explained by a simple bottleneck/founder event scenario. Finally, we use simulations to show that discrepancies between different methods for dating admixture likely reflect different sensitivities of the methods to multiple admixture events from the same (or similar) sources. Overall, this study points to the importance of fine-scale sampling to understand the complexities of human population history. PMID:29301001

Map showing general chemical quality of ground water in the Kaiparowits coal-basin area, Utah

USGS Publications Warehouse

Price, Don

1977-01-01

This is one of a series of maps that describe the geology and related natural resources in the Kaiparowits coal-basin area. Chemical analyses of water from about 40 widely scattered springs, 20 coal-exploration holes in the Kaiparowits Plateau, and 7 water wells in the vicinity of the communities of Escalante and Glen Canyon were used to compile this map. All the water samples were from depths of less than 1,000 feet (305 m). Water-quality data were also available from a number of petroleum wells and exploration holes more than 5,000 feet (1,524 m) deep; however, those data were used with considerable discretion because water produced by deep petroleum wells and exploration holes usually is more saline than water found at shallower depths at the drilling sites.Most of the chemical analyses used were collected by the U.S. Geological Survey in cooperation with State, local, and other Federal agencies. Published sources of data included Phoenix (1963), Iorns, Hembree, and Phoenix (1964), Cooley (1965), Feltis (1966), and Goode (1966, 1969), and the Environmental Impact Statement of the proposed Kaiparowits power project (U.S. Bureau of Land Management, 1976).Little or no ground-water-quality data were available for large areas in the Kaiparowits coal basin. In those areas, the indicated ranged of dissolved-solids concentrations in water from springs and wells are inferred largely from the geology as compiled by Stokes (1964) and Hackman and Wyant (1973). This is especially true for those areas where the designated ranges of dissolved-solids concentrations are 100-1,000 and 500-3,000 mg/l (milligrams per liter).El Paso Natural Gas Co., Resources Co., Kaiser Engineers, and Southern California Edison Co. provided ground-water samples and specific water-quality data collected from their exploratory drill holes on the Kaiparowits Plateau. The cooperation of those firms is gratefully acknowledged.

Job characteristic perception and intrinsic motivation in medical record department staff.

PubMed

Isfahani, Sakineh Saghaeiannejad; Bahrami, Soosan; Torki, Sedighe

2013-01-01

Human resources are key factors in service organizations like hospitals. Therefore, motivating human recourses to achieve the objectives of an organization is important. Job enrichment is a strategy used to increase job motivation in staffs. The goal of the current study is to determine the relationship between job characteristics and intrinsic motivation in medical record staff in hospitals related to Medical Science University in Isfahan in 2011-2012 academic year. The type of the study is descriptive and corelational of multi variables. The population of the study includes all the medical record staffs of medical record department working in Medical Science hospitals of Isfahan. One hundred twentyseven subjects were selected by conducting a census. In the present study, data collected by using two questionnaires of job characteristics devised by Hackman and Oldeham, and of intrinsic motivation. Content validity was confirmed by experts and its reliability was calculated through coefficient of Cronbach's alpha (r1 = 0.84- r2 = 0.94). The questionnaires completed were entered into SPSS(18) software; furthermore, statistical analysis done descriptively (frequency percent, mean, standard deviation, Pierson correlation coefficient,...) and inferentially (multiple regression, MANOVA, LSD). A significant relationship between job characteristics as well as its elements (skill variety, task identity, task significance, autonomy and feedback) and intrinsic motivation was noticed. (p < or = 0.05). Also the results of multivariable regression showed that the relationship between job characteristic and intrinsic motivation was significant and job feedback had the most impact upon the intrinsic motivation. No significant difference was noticed among the mean amounts of job characteristic perception according to age, gender, level of education, and the kind of educational degree in hospitals. However, there was a significant difference among the mean amounts of job

Geologic map of the Galaxias quadrangle (MTM 35217) of Mars

USGS Publications Warehouse

De Hon, Rene A.; Mouginis-Mark, Peter J.; Brick, Eugene E.

1999-01-01

The Galaxias region (MTM 35217) is one of a series of 1:500,000-scale science study areas on Mars sponsored by NASA's Planetary Geology and Geophysics Program. Situated near the northern limit of lava flows associated with Elysium Mons, this region includes a mixture of volcanic and nonvolcanic terrains. The region is also of interest for the fluvial systems that originate along the distal margins of the Elysium lava flows. Resolution of Viking Orbiter images used to prepare the base map ranges from 40 to 160 m/pixel. High-resolution frames (40 to 80 m/pixel) are found in the southeastern part of the map area and along the north edge of the quadrangle, but over half the quadrangle is included in medium-resolution frames (150 m/pixel). Two 8 m/pixel, very high resolution scenes are available (see fig. 1). Interpretation is complicated by variable resolution and sun angles that vary from east to west illumination on different images. Mapping methods and principles are adapted from those developed for lunar photogeologic mapping by Shoemaker and Hackman (1962), refined by Wilhelms (1972), and successfully applied by many workers to a variety of planetary surfaces. Mapping units are distinguished by topography and texture and are ranked by relative age on the basis of superposition and transection relations. Material units are assigned to time-stratigraphic systems defined by Scott and Carr (1978) and Tanaka (1986). This area is included within earlier maps that used Mariner 9 images at 1:5,000,000 scale (Elston, 1979) and globally at 1:25,000,000 scale (Scott and Carr, 1978). Regional maps based on the much higher resolutions of Viking Orbiter allowed more detailed discrimination of materials by Greeley and Guest (1987) at 1:15,000,000 scale and Tanaka and others (1992) at 1:5,000,000 scale. Some map units on this 1:500,000-scale map correspond to, or are partially equivalent to, units on the larger scale maps of Greeley and Guest (1987) and Tanaka and others (1992

Impact of orbit, clock and EOP errors in GNSS Precise Point Positioning

NASA Astrophysics Data System (ADS)

Hackman, C.

2012-12-01

into PPP positioning and timing results allows researchers to focus their improvement efforts in areas most in need of attention. The initial study will be conducted using the simulation capabilities of Bernese GPS Software and extended to using real data if time permits. [1] J.F. Zumberge, M.B. Heflin, D.C. Jefferson, M.M. Watkins and F.H. Webb, Precise point positioning for the efficient and robust analysis of GPS data from large networks, J. Geophys. Res., 102(B3), 5005-5017, doi:10.1029/96JB03860, 1997. [2] C. Hackman, S.M. Byram, V.J. Slabinski and J.C. Tracey, Near-real-time and other high-precision GNSS-based orbit/clock/earth-orientation/troposphere parameters available from USNO, Proc. 2012 ION Joint Navigation Conference, 15 pp., in press, 2012.

Planetary Geologic Mapping Handbook - 2009

NASA Technical Reports Server (NTRS)

Tanaka, K. L.; Skinner, J. A.; Hare, T. M.

2009-01-01

Geologic maps present, in an historical context, fundamental syntheses of interpretations of the materials, landforms, structures, and processes that characterize planetary surfaces and shallow subsurfaces (e.g., Varnes, 1974). Such maps also provide a contextual framework for summarizing and evaluating thematic research for a given region or body. In planetary exploration, for example, geologic maps are used for specialized investigations such as targeting regions of interest for data collection and for characterizing sites for landed missions. Whereas most modern terrestrial geologic maps are constructed from regional views provided by remote sensing data and supplemented in detail by field-based observations and measurements, planetary maps have been largely based on analyses of orbital photography. For planetary bodies in particular, geologic maps commonly represent a snapshot of a surface, because they are based on available information at a time when new data are still being acquired. Thus the field of planetary geologic mapping has been evolving rapidly to embrace the use of new data and modern technology and to accommodate the growing needs of planetary exploration. Planetary geologic maps have been published by the U.S. Geological Survey (USGS) since 1962 (Hackman, 1962). Over this time, numerous maps of several planetary bodies have been prepared at a variety of scales and projections using the best available image and topographic bases. Early geologic map bases commonly consisted of hand-mosaicked photographs or airbrushed shaded-relief views and geologic linework was manually drafted using mylar bases and ink drafting pens. Map publishing required a tedious process of scribing, color peel-coat preparation, typesetting, and photo-laboratory work. Beginning in the 1990s, inexpensive computing, display capability and user-friendly illustration software allowed maps to be drawn using digital tools rather than pen and ink, and mylar bases became obsolete

How old is Autolycus crater?

NASA Astrophysics Data System (ADS)

Hiesinger, Harald; Pasckert, Jan Henrik; van der Bogert, Carolyn H.; Robinson, Mark S.

2016-04-01

reject because our CSFDs show evidence of secondary craters. Areas Ae1 and Ae2 show very young AMAs (<˜0.5-0.6 Ga), which are too young, considering the fact that Aristillus superposes Autolycus and the results of OMAT studies [7]. Areas Ae4 and Ae5 yielded ages of 3.20 and 3.45 Ga, respectively. Although these ages are least affected by secondaries from Aristillus, they are much older than the 2.1 Ga sample ages that were linked to the formation of Autolycus crater [5,6]. This either implies that the dated samples are not related to Autolycus or that the CSFD measurements are so heavily affected by resurfacing and secondary cratering from Aristillus that they do not represent the formation age of Autolycus. In either case, because of these uncertainties Autolycus can not currently be used as a calibration point for the lunar chronology function. A dedicated mission to either sample terrains with ages of 1-3 Ga or in situ dating such surfaces is of high priority to further constrain the lunar chronology. [1] Hiesinger et al. (2012) JGR 117; [2] Stöffler and Ryder (2001) Chronology and Evolution of Mars; [3] Wilhelms (1987) USGS Spec. Pub. 1348; [4] Schultz (1986) Tech. Rep. 86-03; [5] Ryder et al. (1991) Geology 19; [6] Bogard et al. (1990) Geochim. Cosmochim. Acta 54; [7] Grier et al. (1999) LPSC 30; [8] Hackman (1966) USGS I-463; [9] Page (1970) USGS I-666; [10] Grange et al. (2013) JGR 118; [11] Kneissl et al. (2012) PSS 59; [12] Michael and Neukum, (2010) EPSL 294; [13] Neukum et al. (2001) SSR 96.