Abstract: The purpose is to discuss how to correct the atmospheric effects on repeat-pass InSAR. A specific way integrated with MERIS and ASAR was put forward with its elaborate characters andtheory. Taking a differential inter ferogram with test site located in Yangtze River side as a sample, this specific correcting model was applied and tested. Results show that the RMS of deformation in the range direction is obviously decreased and the precision of measurement is enhanced greatly.

Key words: InSAR, atmospheric correction, MERIS, ASAR

摘要： 研究了使用ENVISAT(European environmental satellite)ASAR (advanced synthetic aperture radar) 数据进行重复轨道干涉测量时, 如何利用MERIS ( mediumresdution imaging spectrometer)水汽产品去除干涉差分图中的水汽效应。通过理论研究, 建立了大气校正模型, 并以长江中下游地区宜都市的差分干涉测量为例, 对其进行大气校正。试验结果表明: 斜距向形变的方差显著减小, 干涉测量精度得到了有效改进, 综合应用ASAR 和MERIS 数据可以有效地去除重复轨道InSAR(interferometric synthetic aperture radar)中的大气效应。

关键词: InSAR, 大气校正, MERIS, ASAR