SCIENTIFIC AND TECHNICAL AEROSPACE REPORTS

A Biweekly Publication of the National Aeronautics and Space Administration
VOLUME 44, ISSUE 10 - MAY 19, 2006

91 LUNAR AND PLANETARY SCIENCE AND EXPLORATION
Includes planetology; selenology; meteorites; comets; and manned and unmanned planetary and lunar flights.

For spacecraft design or space stations see 18 Spacecraft Design, Testing and Performance.

20060012339 NASA Goddard Space Flight Center, Greenbelt, MD, USA

Multi-Body Orbit Architectures for Lunar South Pole Coverage

Grebow, D. J.; Ozimek, M. T.; Howell, K. C.; Folta, D. C.; [2006]; 29 pp.; In English; 16th AAS/AIAA Space Flight Mechanics Conference, 22-26 Jan. 2006, Tampa, FL, USA; Original contains black and white illustrations Report No.(s): AAS Paper-06-179; Copyright; Avail.: CASI: A03, Hardcopy

A potential ground station at the lunar south pole has prompted studies of orbit architectures that ensure adequate coverage. Constant communications can be achieved with two spacecraft in different combinations of Earth-Moon libration point orbits. Halo and vertical families, as well as other orbits near L1 and L2 are considered. The investigation includes detailed results using nine different orbits with periods ranging from 7 to 16 days. Natural solutions are generated in a full ephemeris model, including solar perturbations. A preliminary station-keeping analysis is also completed. Author

Ground Stations; Orbital Mechanics; Spacecraft Design; Lunar Surface

20060013015 NASA Goddard Space Flight Center, Greenbelt, MD, USA

Evolving EO-1 Sensor Web Testbed Capabilities in Pursuit of GEOSS

Mandi, Dan; Ly, Vuong; Frye, Stuart; Younis, Mohamed; [2--6]; 11 pp.; In English; AMS 2006, 30 Jan. - 2 Feb. 2006, Atlanta, GA, USA; Original contains color illustrations; Copyright; Avail.: CASI: A03, Hardcopy

A viewgraph presentation to evolve sensor web capabilities in pursuit of capabilities to support Global Earth Observing System of Systems (GEOSS) is shown. The topics include: 1) Vision to Enable SensorWebs with 'Hot Spots"; 2) Vision Extended for Communication/Control Architecture for Missions to Mars; 3) Key Capabilities Implemented to Enable EO-1 Sensor Webs; 4) One of Three Experiments Conducted by UMBC Undergraduate Class 12-14-05 (1 - 3); 5) Closer Look at our Mini-Rovers and Simulated Mars Landscae at GSFC; 6) Beginning to Implement Experiments with Standards-Vision for Integrated Sensor Web Environment; 7) Goddard Mission Services Evolution Center (GMSEC); 8) GMSEC Component Catalog; 9) Core Flight System (CFS) and Extension for GMSEC for Flight SW; 10) Sensor Modeling Language; 11) Seamless Ground to Space Integrated Message Bus Demonstratin (completed December 2005); 12) Other Experiments in Queue; 13) Acknowledgements; and 14) References.

CASI Earth Observing System (EOS); Sensors; Communication Networks; Architecture (Computers)

Source: NASA