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Proceedings Paper

Global simulation of microwave brightness temperature based on satellite observation
Author(s): Xiuli Fu; Ying Guo; Lingmei Jiang
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Paper Abstract

Global brightness temperature simulations were performed at 0.25 degree resolution both including the atmospheric effect and pixel heterogeneity in wide wave band. For surfaces such as snow, deserts, and vegetation, volumetric scattering was calculated using a two-stream radiative transfer approximation. The reflection and transmission at the surface-air interface and lower boundary were derived by modifying the Frenel equations and QP model to account for cross-polarization. Several models were utilized to compute the optical parameters for the medium. Global Land Data Assimilation Systems (GLDAS) provided time series of the main input variables. These simulations were compared with Advanced Microwave Scanning Radiometer-Earth Observing System (AMSR-E) measurements in January, April, July, and September 2003, including both the spectral and temporal variations. A sensitivity study was also carried out to access the relative contributes of the main parameters (particularly the roughness and soil moisture). Difference between simulated and measured TBs were analyzed, discriminating possible issues either linked to the radiative transfer model or due to land surface parameters .

Paper Details

Date Published: 29 December 2008
PDF: 9 pages
Proc. SPIE 7285, International Conference on Earth Observation Data Processing and Analysis (ICEODPA), 72855A (29 December 2008); doi: 10.1117/12.815716
Show Author Affiliations
Xiuli Fu, Institute of Remote Sensing Applications (China)
Graduate Univ. of Chinese Academy of Sciences (China)
Beijing Institute of Petrochemical Technology (China)
Ying Guo, Graduate Univ. of Chinese Academy of Sciences (China)
Lingmei Jiang, Beijing Normal Univ. (China)

Published in SPIE Proceedings Vol. 7285:
International Conference on Earth Observation Data Processing and Analysis (ICEODPA)
Deren Li; Jianya Gong; Huayi Wu, Editor(s)

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