Galileo spacecraft inertial sensors in-flight calibration designThe successful navigation of Galileo depends on accurate trajectory correction maneuvers (TCM's) performed during the mission. A set of Inertial Sensor (INS) units, comprised of gyros and accelerometers, mounted on the spacecraft, are utilized to control and monitor the performance of the TCM's. To provide the optimum performance, in-flight calibrations of INS are planned. These calibrations will take place on a regular basis. In this paper, a mathematical description is given of the data reduction technique used in analyzing a typical set of calibration data. The design of the calibration and the inertial sensor error models, necessary for the above analysis, are delineated in detail.
Jahanshahi, M. H. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Lai, J. Y. (California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)