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High accuracy satellite drag model (HASDM)
Advances in Space Research, 2005The dominant error source in force models used to predict low perigee satellite trajectories is atmospheric drag. Upper atmospheric density models do not adequately account for dynamic changes in neutral density leading to significant errors in predicted satellite positions.
Mark F. Storz +4 more
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AIAA Journal, 1964
A scientific earth satellite that is guided in a drag-free orbit by a shielded, free-falling proof mass has been proposed by a number of investigators. This paper examines the feasibility and some of the applications of this scheme. The control and guidance system is analyzed with respect to system performance and gas usage requirements.
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A scientific earth satellite that is guided in a drag-free orbit by a shielded, free-falling proof mass has been proposed by a number of investigators. This paper examines the feasibility and some of the applications of this scheme. The control and guidance system is analyzed with respect to system performance and gas usage requirements.
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Atmospheric drag on the satellite
Journal of Geophysical Research, 1957The drag exerted on the satellite in its orbit arises partly from collisions with neutral air particles and partly from losses associated with the passage of a charged sphere through an ionized medium. It is found that the charged and neutral effects are comparable under the atmospheric conditions expected at an orbital altitude of 300 miles.
R. Jastrow, C. A. Pearse
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Planetary and Space Science, 1965
Abstract The drag of artificial earth satellites is reconsidered in the light of recent studies of gas-surface interactions and atmospheric composition. Between heights of 140 and 400 km at times of low solar activity, or heights of 140 and 600 km at times of high solar activity, the drag coefficient is almost independent of height, and at present ...
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Abstract The drag of artificial earth satellites is reconsidered in the light of recent studies of gas-surface interactions and atmospheric composition. Between heights of 140 and 400 km at times of low solar activity, or heights of 140 and 600 km at times of high solar activity, the drag coefficient is almost independent of height, and at present ...
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Stability of Gravity-Stabilized Drag-Free Satellites
AIAA Journal, 1971In a drag-free satellite, the relative position sensor null point and the thrustor lines of action will not be coincident with the vehicle mass center. Thus, attitude motion is sensed by the translation control system. The resulting coupling between the attitude and translational motions can cause attitude instabilities in a gravity stabilized drag ...
Fleming, Alan W., DeBra, Daniel B.
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