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When satellite is running, it may be influenced by external factors, and the measurement models of gyro and star sensor are changing with time uncertainly. This situation may lead extended Kalman filter(EKF) divergent. So new adaptive filter can be used in this situation, and it can estimate process noise and measuring noise on-time. This paper has applied Sage-Husa adaptive filter in satellite attitude...
This paper presents a real-time on-orbit calibration algorithm for gyros and star sensor with second-order nonlinear filtering to meet the high accuracy of satellite three-axis attitude determination. A model of gyros misalignment, scale factor error and drift is constructed by considering the error sources during satellite attitude measure. Compared with the other calibration algorithms, this algorithm...
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