【摘要】 地磁场模型存在的误差是磁测定轨精度较低的主要原因之一,为提高自主定轨的精度,本文采用扩展卡尔曼滤波作为处理磁测自主导航问题的滤波算法,以磁强计及星敏感器输出信号为测量信息,对卫星的位置及速度信息进行了估计,并对地磁场模型中几个重要的高斯系数进行了估计与修正。最后给出了数学仿真算例。更多还原

【Abstract】 Because of the Earth’s magnetic field’s model error,the orbit determination precision is not so exact.To improve the estimation precision,using the magnetometer and star sensor’s measurement information,besides determine the satellite’s orbit,the geomagnetic field model is determined and corrected by the Extended Kalman Filtering(EKF).At the end of this paper,a simulation is given.Subject terms Autonomous navigation Magnetometer Extended Kalman filtering Model error更多还原