GPS监测网中系统误差与形变信息的分离方法研究

The Method of Separating Systematic Error from Deformation Evidence in GPS Monitoring Network

本文根据应变分析的理论 ,在GPS监测网中 ,考虑因星历误差等因素的影响 ,使其各期观测的坐标框架不同 ,在观测后期基线相对于前期 (以前期为参考基准 )存在系统误差影响。为消除这种误差的影响 ,在后期的平差计算时 ,引入了 9个应变参数。这样 ,在后期的平差计算中 ,同时解得坐标变化量及 9个应变参数 (后期相对于前期的系统误差 ) ,坐标变化量就是后期点位相对于前期点位的位移量 ,这位移量中已不含系统误差的影响 ,达到将系统误差与形变信息分离的目的。

In GPS monitoring network, based on the theory of strain analysis, the influence of ephemeris errors makes the observation coordinate frames different every time, thus, 9 parameters are proposed to eliminated that. In later base line measurement, both the quantity of coordinate variation and the 9 parameters are calculated, which indicates that this method can successfully identify the systematic errors from deformation information.