Decay of a highly eccentric satellite

Astronomy and Astrophysics – Astronomy

Scientific paper

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Eccentric Orbits, Orbit Calculation, Orbit Decay, Satellite Orbits, Spacecraft Reentry, Apogees, Astrodynamics, Energy Dissipation, Heos Satellites, Orbital Elements, Perigees

Scientific paper

The re-entry phase of a highly eccentric satellite is discussed. Numerical simulations allowing the prediction of the exact date of re-entry of a highly eccentric satellite are exposed. It is shown that under very particular circumstances the life of the satellite can be extended by a few days. The number of final revolutions of the rapidly contracting orbit depends critically on the air density between 70 km and 100 km. Re-entry of the European scientific satellite HEOS-1 predicted for 28 October, 1975 is near such a situation.

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