臧绍帅,姜兆英,王玉京

• 1:青岛市勘察测绘研究院
• 2:青岛市海陆地理信息集成与应用重点实验室
• 3:青岛农业大学

摘要(Abstract)：

进行SBAS技术时,选择的干涉对一般会出现一景影像和其他几景影像干涉的现象,导致构建的线性形变模型病态。在这种情况下,最小二乘法求解SBAS线性形变模型已不太适合。针对这一问题,本文结合Liu估计的有偏迭代法在求解病态线性模型时能够克服病态性对结果的影响,提出将此方法应用到求解SBAS线性形变模型中。以覆盖济宁地区的13景ENVISAT ASAR数据展开了SBAS技术在城市地面沉降监测中的应用实验,分别利用LS法、基于Liu估计的有偏迭代法解算形变模型。结果表明,基于Liu估计的有偏迭代法获得研究区的年平均沉降速率标准差比LS法获得的低1.4,且其求解的结果相较于LS法获得的结果更准确、稳定。

关键词(KeyWords)： SBAS;Liu估计;有偏迭代估计法;病态;形变模型

Abstract:

Keywords:

基金项目(Foundation): 青岛农业大学高层次人才科研基金项目（6631118018）

作者(Author): 臧绍帅,姜兆英,王玉京

DOI: 10.16251/j.cnki.1009-2307.2021.01.016

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