【摘要】 在分析基于贝叶斯统计和马尔科夫随机场理论的解析优化法的基础上,提出以GPS提供的高精度的水平形变速率作为约束,利用直接分解法,将DInSAR的斜距向形变速率分解成垂直形变速率。试验结果表明,直接分解法有效地综合了GPS的高水平精度与DInSAR的高垂直精度优点,且计算简单,克服了解析优化法可能出现的数值不稳定问题。更多还原

【Abstract】 A revised method for derivation of three dimensional surface motions mapping from sparse GPS measurements and a DInSAR interferogram based on the investigation of Analytical Optimization Method(AOM) is proposed,which makes use of random field theory and Gibbs-Markov random fields within Bayesian statistical framework.Using the high accurate horizontal velocity derived from GPS as constrain,the proposed method,called the Directly Decomposing Method(DDM),can obtain accurate vertical velocity from the line of sight velocity of DInSAR.The DDM overcomes the numerical instability problem of the AOM and is simpler in realization.The results of inverse computer modeling are presented and show a drastic improvement of accuracy in vertical direction.更多还原