A Parameterized Surface Emission Model at L-Band for Soil Moisture Retrieval

被引：24
作者：
Chen, Liang [1 ]
Shi, Jiancheng [2 ]
Wigneron, Jean-Pierre [3 ]
Chen, Kun-Shan [4 ]
机构：
[1] Chinese Acad Sci, Beijing 100101, Peoples R China
[2] Univ Calif Santa Barbara, Inst Computat Earth Syst Sci, Santa Barbara, CA 93106 USA
[3] INRA, EPHYSE, F-33883 Villenave Dornon, France
[4] Natl Cent Univ, Ctr Space & Remote Sensing Res, Chungli 3204, Taiwan
来源：
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS | 2010年 / 7卷 / 01期
基金：
国家高技术研究发展计划(863计划);
关键词：
L-band; multiangular; Soil Moisture and Ocean Salinity (SMOS); surface roughness; MICROWAVE EMISSION; REFLECTIVITY MODEL; ROUGHNESS;
D O I：
10.1109/LGRS.2009.2028443
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
The effects of soil surface roughness play a significant role in the microwave emission from the surface. Therefore, a good parameterization of the effects is a prerequisite for retrieving surface soil moisture information. With recent physical model developments, the advanced integral equation model (AIEM) has been proven to provide accurate representation over a wide range of surface-roughness conditions. We evaluated the capability of the AIEM model in simulating multiangular surface emission signals in comparison with a field experiment data set. A simplified multiangular surface emission model was developed based on simulated database using the AIEM model. Based on the parameterized model, an inversion procedure was developed using dual-polarization microwave brightness temperatures to retrieve soil moisture. Two data sets were used to test the inversion algorithm, and the accuracies in root-mean-square error were about 4% for incidence angles from 20 degrees to 50 degrees. This new simple model is suitable for soil moisture retrieval from future L-band satellite data.
引用
收藏
页码：127 / 130
页数：4
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