Oriented variation measurement system, artificial satellite and directional variation measurement method

摘要

Parallel laser light beams (L11, L21) are irradiated from different positions into a telescope (200). Beams of laser light (L12, L22) are incident on a secondary mirror attitude detection mirror (127) from different locations. Laser light detectors (128, 129) detect each beam of laser light reflected by the secondary mirror attitude detection mirror (127). A first attitude calculator (130) determines an amount of attitude variation of a secondary mirror (230) based on a result detected by the laser light detectors (128, 129). The laser light detectors (134, 135) detect each beam of the laser light reflected by the primary mirror (220) and the secondary mirror (230) after entering the telescope (200). A second attitude calculator (136) determines an amount of attitude variation of the primary mirror (220) based on a result detected by the laser light detectors (134, 135) and the result detected by the laser light detectors (128, 129).