西南极菲尔德斯半岛地壳形变监测的数据处理与分析

为了研究南极现代地壳运动，中国在西南极菲尔德斯海峡地区布设了形变监测网，并用ＤＩ－２０测距仪和ＧＰＳ定位仪对该网进行了监测。同时，中国也参加了ＳＣＡＲ组织的全南极ＧＰＳ联测。本文讨论了将形变参数纳入误差方程的水平形变数据处理方法，并对刚体平移、旋转、均匀应变几种典型形变模型在测边网平差中的运用进行了讨论。通过对经典自由网与秩亏自由网的基准分析，提出对形变参数以及其它附加参数和点位参数分别给定参考基准的方法。相应于上述方法，编制了一系列数据处理程序并将之应用于对西南极菲尔德斯海峡形变监测网的数据分析。本文还利用监测网应变分析原理，对ＧＰＳ监测数据进行了讨论和分析，结果表明，菲尔德斯断裂地区存在微小的断裂剪切运动，但位移量不大。

DATA PROCESSING AND ANALYSIS OF CRUSTAL DEFORMATION MONITORING IN WEST ANTARCTIC FILDES PENINSULA REGION

In order to research contemporary crustal movement of Antarctic,China has not only constructed the deformation monitoring network in West Antarctic Fildes Strait region,but also monitored the network by using DI 20 geodimeter and GPS instruments, and participated the Antarctic GPS Campaign Observation organized by SCAR as well. During mathematics processing of crustal horizontal deformation observations,a method to bring deformation parameters into the error equations of observations is discussed in this paper. Several classical deformation models,such as rigid body displacement and strain,are introduced. By analyzing the reference datum of static and dynamic geodetic network,the method is developed to set up different additional weight matrix for every different kind of parameter. A series of programs are developed to implementing the method mentioned above and the a“nalysis of West Antarctic Fildes deformation monitoring network.This paper also involves GPS data processing and analysis of deformation data using principle of monitoring network strain analysis in the paper. The research results indicate that it seems exacting displacement in Fildes rift region,but the displacement is not large,just a little rift shear movement.