Attitude measurement and star line of sight: From on-ground experiment to flight results
Abstract
Three kinds of experiment are described. Attitude determination oriented studies are based on the Sed 12 star sensor use. The first experiment is dedicated to fine attitude determination on the basis of gyro and star sensor data hybridation. The strapdown gyro and star sensor can measure one axis rotations induced by a one axis table motion. Five stars are simulated. Inflight scale factor gyro performance of calibration is studied. Objectives of the second experiment are to realize a functional simulation of a closed loop attitude and orbit control system simulation including a physically real star sensor stimulation. The 'MAPSS' bench developed was open and closed loop tested for a geostationary satellite. The Sigma inflight experiment is described. The French gamma telescope launched on the Soviet Granat satellite in Dec. 1989, is equipped with two CCD (Charged Coupled Device) star sensors. Some inflight results concerning the star sensors operations and performances are given.
- Publication:
-
Spacecraft Guidance, Navigation and Control Systems
- Pub Date:
- December 1991
- Bibcode:
- 1991dncs.rept..179V
- Keywords:
-
- Attitude Indicators;
- Calibrating;
- Ccd Star Tracker;
- Gyroscopes;
- Line Of Sight;
- Attitude Control;
- Feedback Control;
- Systems Integration;
- Systems Simulation;
- Spacecraft Instrumentation