GPS向量网的抗差方差分量估计  

Robust estimation of variance components for GPS baseline network

作　　者：刘长建[1] 刘利[1] 马高峰[1] 

机构地区：[1]信息工程大学测绘学院,郑州450052

出　　处：《全球定位系统》2002年第5期10-13,共4页Gnss World of China

摘　　要：GPS向量网的整体平差中,基线向量间的精度往往存在评定标准不一的问题,如各同步区采用不同的基线解算软件、各同步区观测环境不同等。这类问题可能会造成权比的失调,并因此影响最后的平差结果。另外,由于GPS观测量的粗差出现率也较常规大地控制网的粗差出现率高,若不采用有效措施,也会影响最后的平差结果。本文针对上述情况,讨论了抗差方差分量估计,并给出了算例。The precision criterion of some baseline vectors often differs with the others in the integrated adjustment of GPS baseline network because of different baseline processing softwares, different observation environments and so on. This kind of problem will lead to the disorder of prior ratio before adjustment, and therefore lead to the influence on the adjustment results. At the same time, as known, because the ratio of gross errors in GPS baseline network are higher than normal controlling network, that will also influence the adjustment results. Considering of these two reasons, we mainly discuss robust estimation of variance components in this paper. A numerical example is also given at last.

关 键 词：HELMERT方差分量估计 抗差估计 方差一致性检验 

分 类 号：P228.4[天文地球—大地测量学与测量工程]