Impact of Correlator Efficiency Errors on SMOS Land-Sea Contamination
نویسندگان
چکیده
Land-sea contamination observed in SMOS (Soil Moisture and Ocean Salinity) brightness temperature images is found to have two main contributions: the floor error inherent of image reconstruction and a multiplicative error either in the antenna temperature or in the visibility samples measured by the correlator. The origin of this last one is traced down to SMOS calibration parameters to yield a simple correction scheme which is validated against several geophysical scenarios. Auto-consistency rules in interferometric synthesis together with redundant and complementary calibration procedures provide a robust SMOS calibration scheme.
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ورودعنوان ژورنال:
- IEEE Geosci. Remote Sensing Lett.
دوره 12 شماره
صفحات -
تاریخ انتشار 2015