Sample records for aasta parim sjastrateegia

  1. Longitudinal variation of the equatorial ionosphere: Modeling and experimental results

    NASA Astrophysics Data System (ADS)

    Souza, J. R.; Asevedo, W. D.; dos Santos, P. C. P.; Petry, A.; Bailey, G. J.; Batista, I. S.; Abdu, M. A.

    2013-02-01

    We describe a new version of the Parameterized Regional Ionospheric Model (PARIM) which has been modified to include the longitudinal dependences. This model has been reconstructed using multidimensional Fourier series. To validate PARIM results, the South America maps of critical frequencies for the E (foE) and F (foF2) regions were compared with the values calculated by Sheffield Plasmasphere-Ionosphere Model (SUPIM) and IRI representations. PARIM presents very good results, the general characteristics of both regions, mainly the presence of the equatorial ionization anomaly, were well reproduced for equinoctial conditions of solar minimum and maximum. The values of foF2 and hmF2 recorded over Jicamarca (12°S; 77°W; dip lat. 1°N; mag. declination 0.3°) and sites of the conjugate point equatorial experiment (COPEX) campaign Boa Vista (2.8°N; 60.7°W; dip lat. 11.4°; mag. declination -13.1°), Cachimbo (9.5°S; 54.8°W; dip lat. -1.8°; mag. declination -15.5°), and Campo Grande (20.4°S; 54.6°W; dip lat. -11.1°; mag. declination -14.0°) have been used in this work. foF2 calculated by PARIM show good agreement with the observations, except during morning over Boa Vista and midnight-morning over Campo Grande. Some discrepancies were also found for the F-region peak height (hmF2) near the geomagnetic equator during times of F3 layer occurrences. IRI has underestimated both foF2 and hmF2 over equatorial and low latitude sectors during evening-nighttimes, except for Jicamarca where foF2 values were overestimated.

  2. NASA Public Affairs and NUANCE Lab News Conference at Reno-Stead Airport.

    NASA Image and Video Library

    2016-10-19

    News Conference following the test of Unmanned Aircraft Systems Traffic Management (UTM) technical capability Level 2 (TCL2) at Reno-Stead Airport, Nevada. Parimal Kopardekar, NASA Ames Senior Engineer for Ait Transportation Systems gave an overview of UTM.

  3. NASA Public Affairs and NUANCE Lab News Conference at Reno-Stead Airport.

    NASA Image and Video Library

    2016-10-19

    News Conference following the test of Unmanned Aircraft Systems Traffic Management (UTM) technical capability Level 2 (TCL2) at Reno-Stead Airport, Nevada. Parimal Kopardekar, NASA Ames Senior Engineer for Ait Transportation Systems gave an overview of UTM (Left).

  4. NASA Public Affairs and NUANCE Lab News Conference at Reno-Stead Airport.

    NASA Image and Video Library

    2016-10-19

    News Conference following the test of Unmanned Aircraft Systems Traffic Management (UTM) technical capability Level 2 (TCL2) at Reno-Stead Airport, Nevada. Parimal Kopardekar, NASA Ames Senior Engineer for Ait Transportation Systems gave an overview of UTM (Left). Huy Tran, NASA Ames Aeronautics Director, presents NASA UTM Project Overview.

  5. NASA Public Affairs and NUANCE Lab News Conference at Reno-Stead Airport.

    NASA Image and Video Library

    2016-10-19

    News Conference following the test of Unmanned Aircraft Systems Traffic Management (UTM) technical capability Level 2 (TCL2) at Reno-Stead Airport, Nevada. Parimal Kopardekar, NASA Ames Senior Engineer for Ait Transportation Systems gave an overview of UTM (Left). Tom Wilczek, Aerospace and Defence industry representative and Nevada Govenor's Office of Economic Development (Right).

  6. NASA Public Affairs and NUANCE Lab News Conference at Reno-Stead Airport.

    NASA Image and Video Library

    2016-10-19

    News Conference following the test of Unmanned Aircraft Systems Traffic Management (UTM) technical capability Level 2 (TCL2) at Reno-Stead Airport, Nevada. Parimal Kopardekar, NASA Ames Senior Engineer for Ait Transportation Systems gave an overview of UTM (Left). Maril Mora (Podium), President / CEO of the Reno -Tahoe Airport Authority welcomes NASA and Partners.

  7. NASA Public Affairs and NUANCE Lab News Conference at Reno-Stead Airport.

    NASA Image and Video Library

    2016-10-19

    News Conference following the test of Unmanned Aircraft Systems Traffic Management (UTM) technical capability Level 2 (TCL2) at Reno-Stead Airport, Nevada. The UTM Reno Press Conference on Oct. 19, 2016. (Left to Right) Parimal Kopardekar, NASA Ames Senior Engineer for Air Transportation Systems gave an overview of UTM; Maril Mora, President / CEO of the Reno -Tahoe Airport Authority welcomes NASA and Partners; Tom Wilczek, Aerospace and Defence industry representative and Nevada Governor's Office of Economic Development; Mark Baker, Director of Business Development, Nevada Institute of Autonomous Systems; Manos Maragakis, Dean of the College of Engineering, University of Nevada, Reno.