COMPUTER-EFFICIENT MODELS OF THERMOSPHERIC DENSITY AND COMPOSITION

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$714,718.00
Award Year:
1993
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Award Id:
17974
Agency Tracking Number:
17974
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
3 Preston Court, Bedford, MA, 01730
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Dr. Michael J. Kendra
(617) 275-6767
Business Contact:
() -
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

Enviromental Protection Agency logo

National Aeronautics and Space Administration logo

National Science Foundation logo
US Flag An Official Website of the United States Government