【摘要】 利用西安地区2006年7月至2009年7月7期GPS观测数据及相应的MODIS数据,分析MODIS水汽的校正模型。运用西安地区的Envisat数据和MODIS水汽数据进行D-InSAR大气延迟改正,实验结果表明:在大气状态变化缓慢时,利用MODIS数据对D-InSAR结果有一定的改善。更多还原

【Abstract】 The radar signal propagation delay caused by the spatiotamporal change of atmospheric water vapor contents changing is one of the major error sources for interferometry SAR(InSAR).By using GPS observation data of seven terms from July 2006 to July 2009,and the corresponding MODIS data in Xi’an,the MODIS water vapor correction model is studied,and an experiment of D-InSAR atmospheric delay correction in Xi’an area is carried out.Compared with GPS observations,the results show that MODIS data can be used to correct atmospheric delay in D-InSAR results when the atmosphere state change slowly,though the accuracy improvement is not very obvious.更多还原