1992年LAGEOS卫星全球SLR标准点资料的分析

AN ANALYSIS FOR LAGEOS SLR GLOBAL NORMAL POINT DATA OF 1992

本文利用1992年LAGEOS卫星全球SLR标准点资料对该卫星进行精密定轨，求得残差均方值均小于8cm；在残差分析中，发现目前的SLR标准点资料中含有野值，而且，一些资料有很大的系统偏离。这种情况会对LAGEOS卫星精密定轨和精确的卫星大地测量产生不利影响。第三代SLR系统的测距精度虽然已达厘米级甚至更高，但是，由于以上情况的存在，厘米级的测距精度就有些问题。因此，对第三代SLR系统获得的观测资料必须进行野值剔除，剔除标准一般取为中误差的3倍；对系统偏离大的通过也必须剔除，剔除标准可以定为每站历年bi和τi的均方值的3倍，因系统偏离可以由和反映出来。此外本文对距离偏差和时间偏差（以后简称时距偏差）的确切含义进行了讨论。

In this paper, the mean-square error, which were acquireed in determining LAGEOSorbit with SLR global n0rmal point data of 1992,was less than 8 cm ; some outliers and tgedata in a few of all passes including anomalous system errors were discovered from LAGEOSnormal point data of 1992 in the process of the residual analysesThe circumstances were able to have an adverse effect on precisely determiningLAGEOS orbits. This should be paid great attention too. Through the precision of the thirdgeneration SLR systems reached centimeter level even more, the 3rd generation SLR systemsof some stations were unworthy of the name or title due to above problems.Therefore, in the data obtained from the 3rd generation SLR systems stations theoutliers must be detected according to 3 times mean-square error standard. Because theanomalous system errors were reflected in time bias r, and range bias b,, they must bedetected according to 3 times mean-square values of and b over the year.The reliable meanings of time-bias and range-bias (these were abbreviated to time-range-bias) were still discussed in this paper.