On the rotation of the orbital plane during ballistic re-entry

Details On the rotation of the orbital plane during ballistic re-entry On the rotation of the orbital plane during ballistic re-entry

Oct 1971

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971p%26ss...19.1215a&link_type=abstract

Planetary and Space Science, Volume 19, Issue 10, p. 1215-1224.

Physics

Scientific paper

The planar motion approximation is adequate for re-entry deceleration and heating rate studies. However if the analysis is continued to lower altitudes, we can not any more assume the motion to take place in a fixed plane. In equatorial and midlatitude re-entries with CDA/m = 0.1 m2/kg the atmospheric rotation results in appreciable rotation of the orbital plane from the altitude of 60 km. With CDA/m = 0.001 m2/kg the marked rotation begins at the altitude of 30 km. These results were obtained by calculations using the method outlined in this paper to determine Ω and i as functions of altitude during re-entry. Further we define the conception of relaxed re-entry and give an algorithm to get the impact values of Ω and i. Finally we give an approximate expression for the eastward shift of the impact point due to atmospheric rotation.

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