Stellar Camera

There are many factors affecting the accuracy of satellite attitude determined by star sensor, and the calibration accuracy of the stellar camera parameters is an important factor (Xie, 2007). Although the stellar cameras parameters have been calibrated on the ground before the satellite launches, the camera parameters might change when the satellite had intense vibration in the process of launching and/or the space environmental elements such as temperature, pressure, etc. have changes. All of them will cause the decline of the stellar camera parameters accuracy directly. Therefore, the on-orbit calibration for stellar camera is very essential to assure the attitude accuracy