基于SSR改正的实时精密单点定位精度分析

Analysis of Real-time Precision Point Positioning Based on SSR Corrections

通过IGS分析中心实时播发的SSR(State Space Representation)信息修正广播星历轨道和钟差,使用扩展Kalman滤波数据处理方法仿真实时精密单点定位。结果表明:经过实时SSR修正后的广播星历钟差与IGS最终钟差产品相比,精度优于0.15ns。广播星历SSR修正的实时精密单点定位单天解ENU方向RMS优于20cm,其优于超快速预报星历的实时精密单点定位结果,低于基于IGS最终精密星历的动态精密单点定位精度。

In this paper, Forecasting ephemeris and clock is corrected by real-time SSR （State Space Representation） information IGS Analysis Center broadcast and simulattion of real-time precise point positioning is realised by using the extended Kalman filter algorithm. The results shows that, compared to 1GS final clock products, the accuracy of SSR modified broadcast ephemeris clock is better than 0. 15ns. The ENU direction RMS of SSR broadcast ephemeris corrected real- time precise point positioning is better than 20cm in single day solution, better than the results of rapid ephemeris of real-time precise point positioning and lower than dynamic precise point positio- ning results of the IGS final precise ephemeris.