InSAR大气水汽改正模型的比较应用研究
Comparison of Atmospheric Water Vapour Correction Models for InSAR Measurements
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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。Abstract: 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 can also be concluded that the GTTM and GPS/MODIS integrated models are complementary when correcting InSAR measurements.
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