کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5486532 1399466 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Kinematics effects of atmospheric friction in spacecraft flybys
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم فضا و نجوم
پیش نمایش صفحه اول مقاله
Kinematics effects of atmospheric friction in spacecraft flybys
چکیده انگلیسی
Gravity assist manoeuvres are one of the most successful techniques in astrodynamics. In these trajectories the spacecraft comes very close to the surface of the Earth, or other Solar system planets or moons, and, as a consequence, it experiences the effect of atmospheric friction by the outer layers of the Earth's atmosphere or ionosphere. In this paper we analyze a standard atmospheric model to estimate the density profile during the two Galileo flybys, the NEAR and the Juno flyby. We show that, even allowing for a margin of uncertainty in the spacecraft cross-section and the drag coefficient, the observed -8 mm/s anomalous velocity decrease during the second Galileo flyby of December 8th 1992 cannot be attributed only to atmospheric friction. On the other hand, for perigees on the border between the thermosphere and the exosphere the friction only accounts for a fraction of a millimeter per second in the final asymptotic velocity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Advances in Space Research - Volume 59, Issue 7, 1 April 2017, Pages 1715-1723
نویسندگان
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