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Soil-vegetation-atmosphere radiative transfer model in microwave region
Authors:Yuanyuan Jia  Zhaoliang Li
Institution:(1) Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China;(2) Graduate University of the Chinese Academy of Sciences, Beijing, 100049, China;(3) Academy of Opto-Electronics, Chinese Academy of Sciences, Beijing, 100080, China;(4) Parc d’Innovation, LSIIT/ENSPS, Bld Sebastien Brant, BP10413, 67412 Illkirch, France
Abstract:The radiative transfer is one of the significant theories that describe the processes of scattering,emission,and absorption of electromagnetic radiant intensity through scattering medium.It is the basis of the study on the quantitative remote sensing.In this paper,the radiative characteristics of soil,vegetation,and atmosphere were described respectively.The numerical solution of radiative transfer was accomplished by Successive Orders of Scattering (SOS).A radiative transfer model for simulating microwave brightness temperature over land surfaces was constructed,designed,and implemented.Analyzing the database generated from soil-vegetation-atmosphere radiative transfer model under Advanced Microwave Scanning Radiometer-Earth Observing System (AMSR-E) configuration showed that the atmospheric effects on microwave brightness temperature should not be neglected,particularly for higher frequency,and can be parameterized.At the same time,the relationship between the emissivities of the different channels was developed.The study results will promote the development of algorithm to retrieve geophysical parameters from microwave remotely sensed data.
Keywords:soil-vegetation-atmosphere system  radiative transfer model  microwave remote sensing
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