期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2006
卷号：XXXVI Part 4
出版社：Copernicus Publications
摘要：Space-borne wind scatterometers are important element of microwave remote sensing systems because of their proven ability to make all-weather measurements of wind vector over the ocean. In addition to this, scatterometer have also been investigated for land applications. A portion of hot ("Thar") desert in India is studied for its time-series backscatter res ponse. Major dunes types were identified and their temporal trends were studied. The year 2000 scatterometer data of ERS-2 C-band over this region showed the variability of backscattering coefficient of the order of 11.27 dB (-20.08 to -8.71 dB). These variations were analyzed in terms of scattering due to various factors like soil moisture, vegetation, rainfall, and surface roughness. For this purpose, nine dune signatures over six types of sand dunes have been studied. In general, high backscattering was observed in the months of July – August and low backscattering was observed in the months of May – June. The study indicated the potential of C-band scatterometer data for monitoring temporal variability for modelling and monitoring desert ecosystem. Further, potential of the C-band data for monitoring the aerodynamic roughness length (Z 0 ) over Indian Thar desert was also established
关键词：Scatterometer; ERS-2; Thar; Dunes; Backscattering coefficient; time series
