Mathematics – Logic
Scientific paper
Mar 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ssrv..151..149m&link_type=abstract
Space Science Reviews, Volume 151, Issue 1-3, pp. 149-157
Mathematics
Logic
Atmospheric Drag, Free Molecular Flow (Fmf), Hyperthermal Flow (Htf), Maxwell-Model, Multiple Reflections
Scientific paper
Satellites in low Earth orbits are influenced by the Earth’s atmosphere. The interactions between the molecules and the spacecraft cause the highest non-gravitational force, which in magnitude is comparable to planetary disturbances. Therefore the modelling of atmospheric drag effects is important for many missions with a scientific background like STEP (Satellite Test of Equivalence Principle). With the STEP mission variations between gravitational and inertial mass shall be measured with an accuracy of 10-18. The results are of great interest for cosmological and gravitational theories. To achieve the aimed accuracy, a precise model of external disturbances is necessary. In this article the method of Ray-Tracing is used to quantify the atmospheric drag forces and torques for spacecrafts of arbitrary shape.
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