Smos Smap Synergisms for the Retrieval of Soil Moisture
نویسندگان
چکیده
It is clear there is a dire need of both soil moisture measurements and sea surface salinity retrievals as they are key parameters of the Earth system. To access them in a global and reliable fashion it seems that – even if complemented by other measurements, L-band radiometry is currently the best choice. The advantages are linked to an optimal trade off between high sensitivity to soil moisture and sea surface salinity versus antenna size and Faraday rotation effect, minimal impact of atmospheric effects, and the fact that the L-band has a protected bandwidth (1400-1427 MHz), reducing the RFI risk. So, up to the late 1980s the main limiting factor for an L-band radiometer was antenna size.
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