中文摘要：

对基于GPS数据的大气水汽扰动模型（GPS topography—dependent turbulence model，GTTM）和GPS／MODIS集成的大气水汽改正模型进行了比较研究。试验证明，GTTM模型和GPS／MODIS集成模型的改正方法都可以大大降低大气水汽对InSAR测量地面形变量精度的影响。另外，当两种模型都用于改正InSAR观测值时，它们具有很强的互补性。

英文摘要：

A comparison between GPS topography-dependent turbulence model （GTTM） and GPS/MODIS integrated water vapour correction model is performed. The experimental results show that both correction models are able to improve InSAR derived deformation signals from 10 mm to 5 mm after correction by reducing water vapour effects on InSAR measurements. It canalso be concluded that the GTTM and GPS/MODIS integrated models are complementary when correcting InSAR measurements.