Physics
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.3481d&link_type=abstract
Geophysical Research Letters, Volume 26, Issue 23, p. 3481-3484
Physics
13
Hydrology: Soil Moisture, Mineralogy And Petrology: Metamorphic Petrology
Scientific paper
In order to investigate the effect of the antenna gain on land surface parameter retrievals with SSM/I, a Gauss-function is fitted to the 19 GHz antenna gain functions. Soil moisture and surface temperature distributions for the Red-Arkansas River basins are calculated from a soil-vegetation-atmosphere model. A passive microwave emission model is applied to derive polarized 19 GHz brightness temperatures. Those parameters are aggregated up to 19 GHz footprint size taking into account different spatial weighting according to the Gauss-function. These reference averages represent the full radiometer resolution, which is approximately three times the -3dB resolution. The comparisons between the reference values and simple linear averages for several spatial resolutions lead to differences varying from 2% to 17% volumetric soil moisture.
Drusch Matthias
Lindau Ralf
Wood Eric F.
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