COMPUTER-EFFICIENT MODELS OF THERMOSPHERIC DENSITY AND COMPOSITION

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: N/A
Agency Tracking Number: 17974
Amount: $714,718.00
Phase: Phase II
Program: SBIR
Awards Year: 1993
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Radex, Inc.
3 Preston Court, Bedford, MA, 01730
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Dr. Michael J. Kendra
 (617) 275-6767
Business Contact
Phone: () -
Research Institution
N/A
Abstract
THE PROBLEM OF DEVELOPING COMPUTER-EFFICIENT THERMOSPHERIC DENSITY MODELS IS ADDRESSED, AND DESIGN INVESTIGATIONS FOR IMPROVING THE ACCURACY AND SPEED OF SATELLITE ORBITAL PREDICTIONS IN LOW EARTH ORBIT ARE PROPOSED. EARLY COMPUTER MODELS OF THE ATMOSPHERE WERE DERIVED USING QUASI-STATIC DIFFUSION MODELS, BASED PRIMARILY ON SATELLITE ORBITAL DECAY DATA. RECENT MODELS INCLUDE DATA FROM COMPOSITION MEASUREMENTS, AND MORE ELABORATE FIRST-PRINCIPLES CODES SUCH AS TIGCM, HOWEVER WITHOUT SATISFACTORY IMPROVEMENT IN DECAY PREDICTION CAPABILITY. THE LATEST MODELS PROVIDE THERMOSPHERIC WINDS, A FIRST ORDER EFFECT ON SATELLITE DRAG WHICH HAS GENERALLY BEEN IGNORED IN ORBIT PROPAGATION SOFTWARE. EXTENSIVE AND CORRELATED SATELLITE ORBITAL HISTORIES ARE AVAILABLE, AND MAY BE USED TO EVALUATE THESE MODELS FOR ACCURACY AND DESIGN. BOTH RESEARCH AND SOFTWARE ENGINEERING DEVELOPMENT APPROACHES ARE PROPOSED IN ORDER TO ESTABLISH BENCHMARKS, IMPROVE CODE EFFICIENCY, DEVELOP DIAGNOSTIC TOOLS, AND IDENTIFY DEFICIENCIES THRU TESTING AND THRU THEORETICAL CONSIDERATIONS. THIS IS PROPOSED IN PHASE I.

* information listed above is at the time of submission.

Agency Micro-sites

SBA logo
Department of Agriculture logo
Department of Commerce logo
Department of Defense logo
Department of Education logo
Department of Energy logo
Department of Health and Human Services logo
Department of Homeland Security logo
Department of Transportation logo
Environmental Protection Agency logo
National Aeronautics and Space Administration logo
National Science Foundation logo
US Flag An Official Website of the United States Government