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Validation is an important and particularly challenging task for passive microwave remote sensing of soil moisture from Earth orbit. As part of the Advance Microwave Scanning Radiometer-E (AMSR-E) validation programs networks of dedicated validation sites were developed. Measurements have been made on a continuous basis since 2002. The NASA and JAXA standard soil moisture products were compared to...
We present a detailed analysis of the airborne passive microwave remote-sensing data that were collected at a broad range of microwave bands and at a high spatial resolution during the 2002 and 2003 National Aeronautics and Space Administration Cold Land Processes Experiment (CLPX). An accurate measurement of snowpack properties using passive microwave observations requires the detailed knowledge...
Validation is a challenging task for passive microwave remote sensing of soil moisture from Earth orbit. The key issue is spatial scale; conventional measurements of soil moisture are made at a point, whereas satellite sensors provide an integrated area/volume value for a much larger spatial extent. A robust validation program should include as many types of comparisons as possible and must attempt...
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