星载GPS卡尔曼滤波定轨算法

An Orbit Determination Algorithm with Onboard GPS using Kalman Filter

利用卡尔曼滤波定轨算法,处理神舟4号星载GPS伪距实测资料,重点在于 研究卡尔曼滤波中模型误差方差矩阵的选取准则, GPS信号中断或连续野值对递推滤波 的影响,如何自主监控滤波的运行状态,即是正常还是趋于发散,目的在于评价该算法用 于星上自主定轨长期平稳运行的可靠性．

The Kalman filter is used in the orbit determination of Shenzou 4 with onboard GPS data. The study is mainly on three problems： the choice of variance matrix of model noise, the influence of signal interrupt or continuous outliers to the recursion filter and the method of monitoring the running status （normal or divergence） of the filter. The aim is to evaluate the reliability of this algorithm for the long-time on-board autonomous orbit determination.