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Advances in the study of microwave land surface emissivity model |
| WU Ying1,2, WANG Zhenhui1,2 |
1. Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing 210044, China;
2. School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing 210044, China |
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Abstract The land surface emissivity is a key parameter in the land data assimilation system, and the uses of the satellite microwave data under most land conditions are significantly increasing by implementing the microwave land emissivity model(MLEM)in the satellite data assimilation system. This paper systematically reviews the progress of MLEM in the aspects of physical model and semi-empirical model. The main advantages and limitations of the two types of models are also discussed. Finally, the development tendencies of simulating microwave land emissivity (MLE) by models are proposed, such as improving the accuracy of the inputs, taking assumptions of models into account, and strengthening the study of the microwave radiative transfer process. Some proposals are also put forward concerning the improvement of the method for further research on the semi-empirical model in the application of satellite data and the attention to the contrast between the models and the quantitative evaluation methods of models.
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| Keywords
LiDAR
angular texture signal(ATS)
road intersection
Snake
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Issue Date: 21 October 2013
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2013,
Vol. 25
