GPS测站所处构造位置的统计检验

STATISTICAL TEST FOR TECTONIC LOCATION OF GPS STATIONS

运用方差分析理论，基于有约束和无约束平差所得到的方差的统计特征，给出了一种根据复测结果判别一组测站是否位于同一构造块体上的假设检验方法。该方法实质上是通过方差比，检验某组测站位于同一构造块体的约束是否正确，从而达到判别的目的。这一方法已实际应用于华北地区ＧＰＳ复测资料的分析［７］，取得了较好的效果。

Before analysis of crustal movement by use of GPS observation data, it is the first stage that the tectonic locations of all observed stations are determined, then a correct tectonic model for deformation analysis can be established. Based on so called “covariance analysis theory”, a method to judge a group of stations whether they really can be considered to be located in same tectonic block or not is proposed by using the covariance statistical characters obtained from adjustments with and without constraint condition. Essentially, the method uses covariance ratio to test constraint correctness of stations situated on the same tectonic blodk, so that the purpose of identification can be reached. The method is successfully used to analyse the repeated observation data of GPS in North China and a good result is obtained.