基于多时刻时差的三星时差定位跟踪算法

A target tracking algorithm for three satellites constellation TDOA location system based on asynchronous TDOA measurements

对于高海拔目标,引入地球椭球模型会产生很大的系统误差,三星座时差定位算法只能采用两路时差信息作为观测向量。因此,传统的时差定位方法具有一定的局限性。提出了一种利用不同时刻时差信息的三星座时差滤波算法,利用不敏卡尔曼滤波(UKF)对不同时刻时差信息进行滤波估计静止目标位置。仿真表明该滤波方法相对于三星座时差滤波算法来说跟踪性能更好。

For an altitude object,using an ellipsoid earth model will introduce a system bias to the solution.A target tracking algorithm for three satellites constellation TDOA localization system merely uses two TDOA parameters as measurements.Thus,the conventional TDOA localization algorithm has some limitations.An algorithm using asynchronous TDOA measurements is proposed to estimate the static target position.The simulation indicated that this method has better tracking performance.