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Utilization of Active Microwave Roughness Measurements to Improve Passive Microwave Soil Moisture Estimates Over Bare Soils

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3 Author(s)
Theis, S.W. ; Texas Instruments Incorporated, McKinney, TX ; Blanchard, B.J. ; Blanchard, A.J.

Investigators have researched operational microwave techniques for the remote estimation of soil moisture for sometime now. Both active and passive microwave sensors respond to variations in soil moisture, but also respond to vegetation and roughness parameters. This has led to research in multisensor techniques which account for the interference. Previously, techniques have been developed which used visible and infrared bands (similar to Landsat) to compensate for the vegetation masking on the L-band passive radiometer's response to soil moisture. In contrast, this study compensates for the surface roughness effect by using microwave scatterometer data on the same L-band radiometer. It was found that the L-band radiometer's capability to estimate soil moisture over bare fields was significantly improved when surface roughness was accounted for with scatterometers.

Published in:

Geoscience and Remote Sensing, IEEE Transactions on  (Volume:GE-24 ,  Issue: 3 )

Date of Publication:

May 1986

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