The 20th Workshop on JAXA Astrodynamics and Flight Mechanics 2010 (July 26-27, 2010. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan
It was necessary to navigate the spacecraft accurately by ion propulsion before the end of trajectory transformation on March 2010. Therefore, orbit detemination was performed with estimation of ion propulsion magnitude and direction error. Trajectory Correction Maneuvers (TCM) were accomplished five times by ion propulsion from April to June 2010. Each TCM was performed only by ion propulsion, and Doppler data were monitored to watch the real-time status of TCM accomplishment. The cut-off time of ion propulsion for each TCM was detemined by the result of Doppler change. Doppler monitoring was used for capsule separation evaluation too. We evaluated the separation by the change of the mother ship's attitude and velocity caused by the separation, because the capsule itself could not communicate with ground stations. The Doppler data gap at the separation shows that the capsule separation was accomplished well. The spacecraft and its capsule re-entered to east side of Woomera Prohibited Area (WPA) in Australia successfully on June 13, 2010.
Hayabusa Orbit Determination before Re-entry
