随机模型对BDS/GPS长基线解算精度的影响

摘要

In this paper,we discuss the effects on the accuracy of solutions of GPS/BDS long baseline,on the commonly used equalization model,the height angle model,and the Helmert posterior variance estimation model.We use data of the ZHJJ and QLA measuring stations (Sichuan CORS network).The results show that:(1) a BDS/GPS combination system can achieve long baseline high-precision solutions;(2) the solution accuracy of the Helmert posterior variance estimation random model is highest,and can achieve horizontal and vertical accuracy of 140 km long baseline solution in BDS/GPS combination system better than 8 mm and 10 mm respectively;(3) the performance of the equivalent entitlement model and the height angle random model is equivalent in solving BDS/GPS long baseline single epoch.%利用四川CORS网中ZHU、QLAI两个测站数据探讨常用的等权模型、高度角模型以及Helmert验后方差估计模型对BDS/GPS长基线解算精度的影响.结果表明:1)BDS/GPS组合系统可以实现长基线高精度解算;2)Helmert验后方差估计随机模型解算精度最高,BDS/GPS组合系统140 km长基线解算精度在水平向和垂向分别优于8 mm和10 mm;3)等权随机模型、高度角随机模型对BDS/GPS长基线解算性能基本相当.