On fundamental problems in the deduction of atmospheric densities from satellite drag

Details On fundamental problems in the deduction of atmospheric densities from satellite drag On fundamental problems in the deduction of atmospheric densities from satellite drag

Aug 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jgr....80.3077i&link_type=abstract

Journal of Geophysical Research, vol. 80, Aug. 1, 1975, p. 3077-3086. USAF-supported research.

Physics

3

Accommodation Coefficient, Atmospheric Density, Density Measurement, Orbit Decay, Satellite Drag, Aerodynamic Drag, Error Analysis, Satellite Orbits

Scientific paper

The largest source of error in the deduction of atmospheric densities from orbital data stems from uncertainty in the interaction of atmospheric molecules with satellite surfaces. A method of determining two of the important parameters, the accommodation and drag coefficients, is developed in detail. As an example, the method is applied to observational data from the paddle-wheel satellite Ariel 2. Because of the importance of spherical satellites, the drag coefficient for a sphere under the conditions of Ariel 2 (a moderately eccentric orbit with perigee near 300 km) is also obtained.

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