ORIENTATION VARIATION MEASUREMENT SYSTEM, SATELLITE, AND ORIENTATION VARIATION MEASUREMENT METHOD

摘要

Parallel laser light beams are irradiated from different positions into a telescope. Beams of laser light are incident on a secondary mirror attitude detection mirror from different locations. Laser light detectors detect each beam of laser light reflected by the secondary mirror attitude detection mirror. A first attitude calculator determines an amount of attitude variation of a secondary mirror based on a result detected by the laser light detectors. The laser light detectors detect each beam of the laser light reflected by the primary mirror and the secondary mirror after entering the telescope. A second attitude calculator determines an amount of attitude variation of the primary mirror based on a result detected by the laser light detectors and the result detected by the laser light detectors.

主权项

1. A pointing variation measuring system, comprising:
a secondary mirror attitude detection mirror disposed on a secondary mirror of a reflective condenser optical system, the reflective condenser optical system including a primary mirror and the secondary mirror; a laser light output unit to irradiate the reflective condenser optical system with at least two parallel beams of laser light from respective different locations and irradiate the secondary mirror attitude detection mirror with at least two additional beams of laser light from respective different locations; a first laser light detector unit to detect each beam of laser light reflected by the secondary mirror attitude detection mirror; a first attitude calculator to determine, based on a result detected by the first laser light detector unit, an amount of attitude variation that is a deviation between a reference attitude of the secondary mirror and a current attitude of the secondary mirror; a second laser light detector unit to detect each beam of laser light reflected by the primary mirror and the secondary mirror after entering the reflective condenser optical system; and a second attitude calculator to determine, based on a result detected by the second laser light detector unit and the result detected by the first laser light detector unit, an amount of attitude variation that is a deviation between a reference attitude of the primary mirror and a current attitude of the primary mirror.