Monitoring snow depth and its change using repeat-pass interferometric SAR in Manas River Basin

作者: Hui Li , Pengfeng Xiao , Xuezhi Feng , Guangjun He , Zuo Wang

DOI: 10.1109/IGARSS.2016.7730288

关键词:

摘要: Snow depth is one of the most important parameters for hydrological applications. SAR (Synthetic Aperture Radar) has ability to monitor surface deformation effectively, with a certain penetration and interference measurement capability. The refraction microwaves in dry snow shown have significant effect on interferometric phase. According this, estimation repeat-pass InSAR (Interferometic SAR) by using ENVISAT ASAR IMS products was proposed. Taken pediment plain Manas river basin as study area, optimal pairs (with without snow) were chosen, then phase calculated product optimized processing. And local incident angle used improve final estimated result substitution satellite 23°. From results between Jul. 2008 Feb. 2009, it pictured that average about 20cm which consistent field survey results. Lastly, error evaluation proposed unreasonable results, also some reasons cause inaccuracy discussed: decoherence due cover atmospheric effects; two input parameters: may changed because distribution, density varies metamorphism hierarchy whole area.

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