基于不同精密产品BDS-3 PPP解算性能分析

Performance analysis of BDS-3 PPP solution based on different precision orbit products

精密星历与钟差产品是BDS-3系统PPP解算必不可少的输入参数,因此分析当前何种精密产品更适合BDS-3系统PPP解算是非常重要的。本文设计了静态与仿动态两种PPP解算实验,分析了COD、ESA、GBM、SHAO以及WUM五种精密产品对BDS-3双频与三频PPP性能的影响。实验结果表明,BDS-3双频与三频静态PPP采用五种精密星历与钟差解算结果差异性较小,而动态PPP解算结果差异性较大,且动态PPP采用WUM精密星历与钟差解算结果最差,其余差异性较小,无论何种模式下,采用ESA精密星历与钟差解算结果最优,定位精度都在厘米级,可为今后BDS-3系统PPP解算精密产品的选择提供一定参考。

Precision ephemeris and clock error products are essential input parameters for BDS-3 PPP solution,so it is very important to analyze which precision product is more suitable.This paper designs static and dynamic simulations experiments and the two kinds of PPP experiments are conducted to analyze the influence of using five precision orbit products which are from COD,ESA,GBM,SHAO and WUM respectively.The results show that the BDS-3 dual-frequency and triple-frequency static PPP uses five kinds of precise ephemerides and the clock errors have little difference,while the dynamic PPP have a large difference,and the dynamic PPP using WUM precise ephemeris is worst.No matter which modes,the dynamic PPP using ESA precision ephemeris and clock error are the best,and the positioning accuracy is at the centimeter level,which can be used for the future BDS-3 PPP.