GPS观测结果变形分析的参考框架及其合理性

Reference Frame and Its Advisability in Deformation Analysis of GPS Observation Results

参考框架问题是利用 GPS观测资料得到位移场 ,进而分析地壳运动时必须解决的一个主要问题。本文对目前框架问题的两种主要处理方法作了归纳。指出这些方法的分析结果是否合理应予以定量判别。否则 ,将不能得出适当的位移解。对这两种方法所采用的参考框架的合理性给出了判别准则。并在此基础上 ,针对分析局部区域 (例如中国大陆 )的相对运动的需要提出了一种较为容易实现的局部相对稳定参考框架。介绍了这种方法的具体做法。并通过对攀登计划下的两期复测资料 ,用这 3种做法做了试算和验证。

During deriving displacement field and then analyzing crustal deformation, reference frame should be determined firstly. Two major methods for resolving reference frame problem that are commonly used nowadays are generalized in this paper. And it pointed out the problem that the results under the selected reference frames that are determined with those methods are reasonable or not should be judged quantitatively. Otherwise the displacement result might unreasonable. The criteria for judging advisability of reference frame obtained with the two methods are given. Based on the generalization a method, which is obtained more easily and more suitable for analyzing regional (relative to world wide, China continent for example) relative motion is proposed. The reference frame obtained with the new method could be called Regional Relatively Stable Reference Frame (RRSRF). The concrete procedures for obtaining the RRSRF are introduced. Tests and checking computations are also given by using two of data sets of repeatedly GPS observations that were obtained from Climbing Project.