Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977aiaa.confy....m&link_type=abstract
American Astronautical Society and American Institute of Aeronautics and Astronautics, Astrodynamics Specialist Conference, Jack
Astronomy and Astrophysics
Astronomy
Aerodynamic Brakes, Aerodynamic Drag, Circular Orbits, Elliptical Orbits, Venus (Planet), Attitude Control, Energy Requirements, Heat Shielding, Inconel (Trademark), Orbit Decay, Radar Imagery, Synthetic Arrays
Scientific paper
The use of atmospheric drag to circularize an elliptical spacecraft orbit at Venus is analyzed parametrically for the Venus Orbital Imaging Radar Mission (VOIR) in 1983. Navigation, maneuver, and guidance requirements are discussed for the decay of a 24-hr orbit to a close circular orbit in about 30-60 days. A prototype 'Aerobrake' is described which is approximately 5 m in diameter and 25 kg in mass and which replaces a chemical retroengine of about 1300 kg in mass (delta V = 2.5 km/s) by a 700 kg in-orbit mass. The aerobrake, a light deployable Inconel sheet, shields the spacecraft from the flow and radiates the aerodynamic heating.
McRonald Angus D.
Nock Kerry T.
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