抗差估计在精密单点定位参数收敛中的应用  

APPLICATION OF ROBUST ESTIMATION IN PRECISE POINT POSITIONING

作　　者：李强[1] 彭军还[1] 李淑慧[1] 张珂[1] 王洪友[1] 

机构地区：[1]中国地质大学,北京100083

出　　处：《大地测量与地球动力学》2013年第4期104-106,共3页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(41074009;40674015);中科院对地观测中心重点实验室基金(2010LDE002)

摘　　要：提出基于抗差估计理论改善精密单点定位参数收敛时间的策略,并对24个1小时的实测数据进行解算。结果表明,抗差估计对于提高精密单点定位的参数收敛时间具有一定效果,成功率高于最小二乘。不同时段的定位精度表明,抗差估计方法能明显提高短时段数据解算的精度,可以削弱无法有效收敛的模糊度参数对定位的影响。A new strategy derived from robust estimation to improve the convergence time of precise point posi tioning is presented, and the 24 1hour data are processed to test the strategy. The results show that robust estima tion is effective to improve the convergence time of precise point positioning, it also shows the success rate of robust estimation is better than that of least squares. The positioning results show that robust estimation is significant to im prove the positioning accuracy of small spans, and could reduce the affection of the observations which their ambi guities aren＇t convergent effectively.

关 键 词：精密单点定位 收敛时间 抗差估计 模糊度 短时段数据 

分 类 号：P207[天文地球—测绘科学与技术]