利用p^3软件进行GPS单点定位解算的若干问题

Problems Relating to High Precise Point Positioning of GPS Using p^3 Software

利用p3软件对大量实测数据进行了高精度单点定位有关问题的验证和分析;在IGS提供的精密星历和卫星钟差产品中,较为深入地比较分析了快速产品和几种最终产品的定位精度、收敛速度及p3软件的正反算结果精度。得出以下结论:快速产品与最终产品的定位精度和收敛速度相似;COD的收敛速度和定位精度最高;p3软件的反算精度明显优于正算,且精度也比较均匀。这些研究成果对PPP技术的实际应用具有较好的借鉴意义。

The problems of high precise point positioning were validated and analyzed using p^3 software by the plentiful actual measured data in this paper. The positioning accuracy and the convergence rate, the accuracy of direct and inverse solution for p^3 software were deeply analyzed in IGS precise ephemeris and clock offset of GPS satellite, compared with fast product and several final products. The conclusions obtained were as follows： The positioning accuracy and the convergence rate were similar both fast product and final products, in which COD was the highest. The accuracy of inverse solution showed obvious advantage over the direct, at the same time the accuracy was equal relatively. The results took on preferable significance as reference to the actual application of PPP technology.