Journal
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
Volume 50, Issue 10, Pages 3844-3858Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TGRS.2012.2185934
Keywords
Bare agricultural soils; polarimetric SAR data; RADARSAT-2; soil surface characteristics
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Funding
- U.S. Department of Commerce [BS123456]
- FP7 CLIMB project (Climate-induced changes on the hydrology of Mediterranean Basins)
- IRSTEA (National Research Institute of Science and Technology for Environment and Agriculture)
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The objective of this study was to analyze the potential of the C-band polarimetric synthetic aperture radar (SAR) parameters for the soil surface characterization of bare agricultural soils. RADARSAT-2 data and simulations using the integral equation model were analyzed to evaluate the polarimetric SAR parameters' sensitivities to the soil moisture and surface roughness. The results showed that the polarimetric parameters in the C-band were not very relevant to the characterization of the soil surface over bare agricultural areas. Low dynamics were often observed between the polarimetric parameters and both the soil moisture content and the soil surface roughness. These low dynamics do not allow for the accurate estimation of the soil parameters, but they could augment the standard inversion approaches to improve the estimation of these soil parameters. The polarimetric parameter alpha(1) could be used to detect very moist soils (> 30%), while the anisotropy could be used to separate the smooth soils.
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