TY - JOUR
T1 - Hayabusa-final autonomous descent and landing based on target marker tracking
AU - Yoshimitsu, Tetsuo
AU - Kawaguchi, Jun'ichiro
AU - Hashimoto, Tatsuaki
AU - Kubota, Takashi
AU - Uo, Masashi
AU - Morita, Hideo
AU - Shirakawa, Kenichi
PY - 2009/9
Y1 - 2009/9
N2 - In November 2005, Hayabusa performed descent flights to the Itokawa surface five times. The Itokawa surface is full of boulders against expectation and there are few flat areas where the spacecraft can touchdown safely. With the reaction wheels lost prior to the events, it was very difficult to control translation motion accurately, since the guidance accuracy of several millimeters per second was requested. The guidance and navigation before launch assumed the autonomous guidance by identifying the illumination center aboard. However, it was not successful due to the highly irregular shape of the asteroid. On the other hand, the scenario based on the terrain recognition in quasi real time well worked. It was anticipated not useful before launch, since such process was conceived to take a lot of time and not effectively useful in real time operation. The Hayabusa project team devised and built the special tool on the ground and had tuned it before the successful three touchdowns and one long landing on the surface.
AB - In November 2005, Hayabusa performed descent flights to the Itokawa surface five times. The Itokawa surface is full of boulders against expectation and there are few flat areas where the spacecraft can touchdown safely. With the reaction wheels lost prior to the events, it was very difficult to control translation motion accurately, since the guidance accuracy of several millimeters per second was requested. The guidance and navigation before launch assumed the autonomous guidance by identifying the illumination center aboard. However, it was not successful due to the highly irregular shape of the asteroid. On the other hand, the scenario based on the terrain recognition in quasi real time well worked. It was anticipated not useful before launch, since such process was conceived to take a lot of time and not effectively useful in real time operation. The Hayabusa project team devised and built the special tool on the ground and had tuned it before the successful three touchdowns and one long landing on the surface.
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U2 - 10.1016/j.actaastro.2009.01.074
DO - 10.1016/j.actaastro.2009.01.074
M3 - Article
AN - SCOPUS:67349104540
VL - 65
SP - 657
EP - 665
JO - Acta Astronautica
JF - Acta Astronautica
SN - 0094-5765
IS - 5-6
ER -