卫星干扰源定位中的误差分析与预测

卫星干扰源定位系统可以通过测量两颗卫星对干扰源形成的时差（DTO）和频差（DFO）来完成对未知干扰源的定位，其定位误差除了与时差、频差等参数测量值有关外，还和随时间变化的卫星星历有密切的关系。针对这一问题，首次提出了利用星历时变性特点来提高定位精度的新方法，该方法通过预测的定位误差来选择定位的最佳时刻，通过整合多次最佳时刻的定位结果来获得最小的定位误差。仿真表明，相对于传统的定位方法，这种新方法可以取得优于一个数量级的定位精度改善。

Analysis and prediction of satellite interference location error

With differential time offset and differential frequency offset, the position of the satellite interference can be located by using two-satellite techniques. Besides the observation errors of DTO and DFO, the location error depends on the time variable two-satellite ephemeris. A novel method is presented to improve the accuracy of the location. The best location time is selected based on the predicted location error and the minimum location error can be obtained through the consolidation of the optimal results of the location. Compared with existing alternatives without consolidation, simulation results confirm that the proposed method can reduce the position error by an order of magnitude or more.