Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991esasp.326..141e&link_type=abstract
In ESA, Spacecraft Flight Dynamics p 141-147 (SEE N92-24719 15-12)
Astronomy and Astrophysics
Astronomy
Aerobraking, Japanese Spacecraft, Orbit Calculation, Space Navigation, Spacecraft Tracking, Altitude, Lunar Flight, Perigees, Swingby Technique
Scientific paper
Two passes of the ISAS (Japan's Institute of Space and Astronautical Science) Hiten spacecraft through the Earth's atmosphere, at perigee altitudes of 125 km and 120 km, during Mar. 1991 marked the first aerobraking technology demonstrations for an object in cis-lunar orbit traveling at near Earth escape velocity. Prediction and control of perigee altitude to better than 1 km was desired to assure spacecraft survival. Covariance analysis provided confidence that prediction accuracy better than 200 m for support of final trim maneuver design was achievable with NASA DSN (Deep Space Network) tracking support. ISAS used orbit determination results in their decisions to cancel final trim maneuvers. Post flight reconstructions, marking the first combined use of DSN and ISAS tracking data, yielded perigee altitude solutions which agree with the near real time mission operations support predictions to better than 50 m.
Efron Leonard
Ellis John
Menon Premkumar R.
Tucker Bernadette
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