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Proceedings Paper

Model investigation of the effect of vegetation on passive microwave soil moisture retrieval
Author(s): Zhongjun Zhang; Guoqing Sun
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Paper Abstract

Many studies on soil moisture retrieval at vegetated area from microwave radiometry data assume a simple model of vegetation, which is characterized by vegetation volume fraction, effective dielectric constant, plant moisture content, etc. In this study, a radiative transfer model is used to model the emissivity and transmissivity of forest canopy, which is more realistically characterized as a volumetric medium consisting of discrete scatters (leaves, stems, tree branches, and trunks). To facilitate the soil moisture inversion from radiometry data, the unknown variables need to be reduced. The possibility of fitting the modeled emissivity and transmissivity of vegetation canopy into simple equations, and the relationships of these parameters between different microwave radiometry frequencies were studied and the results are presented in this paper.

Paper Details

Date Published: 30 April 2003
PDF: 10 pages
Proc. SPIE 4894, Microwave Remote Sensing of the Atmosphere and Environment III, (30 April 2003); doi: 10.1117/12.466080
Show Author Affiliations
Zhongjun Zhang, Beijing Normal Univ. (China)
Beijing Key Lab. for Remote Sensing of Environment and Digital Cities (China)
Guoqing Sun, NASA Goddard Space Flight Ctr. (United States)
Univ. of Maryland/College Park (United States)

Published in SPIE Proceedings Vol. 4894:
Microwave Remote Sensing of the Atmosphere and Environment III
Christian D. Kummerow; JingShang Jiang; Seiho Uratuka, Editor(s)

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