A Vegetation Correction Methodology Applied for Soil Moisture Retrieval from C-Band Radar Observations
作者： A. T. Joseph , P. E. O'Neill , R. van der Velde , R. Lang , T. Gish
DOI: 10.1109/IGARSS.2008.4779012
关键词:
摘要: This research presents a methodology to correct backscatter (sigmadeg) observations for vegetation effects. The proposed is based on the concept that ratio between surface scattering over total amount of (sigmadegsurface/sigmadegsoil) affected only by and can be described as function water content. data set used in this study was collected at USDA's Optimizing Production Inputs Economic Environmental Enhancement (OPE3) experimental site Beltsville, Maryland (USA) corn growth cycle 2002 includes C-band (4.75 GHz) HH- VV-polarized acquired incidence angles 15, 35 55 degrees. During period crops reached peak biomass 6.6 kg m-2 soil moisture range varying from 0.02 0.26 cm3cm-3. results show through application correction retrieval accuracy improved 0.033 0.032 cm3cm-3, 0.049 0.079 0.047 cm3cm-3 degrees, respectively.
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