Entry Dispersion Analysis for the Hayabusa Spacecraft using Ground Based Optical Observation

Details Entry Dispersion Analysis for the Hayabusa Spacecraft using Ground Based Optical Observation Entry Dispersion Analysis for the Hayabusa Spacecraft using Ground Based Optical Observation

2011-06-29

arxiv.org/abs/1106.5835v1

Physics

Data Analysis, Statistics and Probability

Scientific paper

Hayabusa asteroid explorer successfully released the sample capsule to Australia on June 13, 2010. Since the Earth reentry phase of sample return was critical, many backup plans for predicting the landing location were prepared. This paper investigates the reentry dispersion using ground based optical observation as a backup observation for radiometric observation. Several scenarios are calculated and compared for the reentry phase of the Hayabusa to evaluate the navigation accuracy of the ground-based observation. The optical observation doesn't require any active reaction from a spacecraft, thus these results show that optical observations could be a steady backup strategy even if a spacecraft had some trouble. We also evaluate the landing dispersion of the Hayabusa only with the optical observation.

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