Azimuth variation in microwave backscatter over the Greenland ice sheet - Geoscience and Remote Sensing Symposium, 2001. IGARSS '01. IEEE 2001 International
نویسندگان
چکیده
Scatterometer backscatter measurements are becoming an important tool for monitoring the dynamic behavior of the Greenland ice sheet. However, most Greenland studies assume constant backscatter for varying azimuth angles. Detailed analysis of scatterometer data sets show non-negligible (1-2 dB) azimuth modulation. The magnitude and orientation of the azimuth modulation observed by SeaWinds, NSCAT, and ERS are documented herein. The dominate factor is second order azimuth modulation, which is largest for C-band (ERS). For SeaWinds, the h-pol azimuth modulation is larger than for v-pol.
منابع مشابه
Relating Microwave Backscatter Azimuth Modulation to Surface Properties of the Greenland Ice Sheet
Azimuth modulation of the normalized radar crosssection in satellite data sets over Greenland is investigated. Data sets from the NASA Scatterometer (NSCAT) and from the European Remote Sensing Advanced Microwave Instrument (ERS) are employed. Azimuth dependence is clearly observed. The largest azimuth dependence occurs in the C-band ERS data with peak-to-peak azimuth modulations up to 3.0 dB. ...
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تاریخ انتشار 2001