The Passive Microwave Brightness Temperature Simulation Under Different Atmosphere Conditions
In order to get more accurate geophysical variables from passive radiometers, atmospheric influence to millimeter and Sub-millimeter propagation should be considered. In this paper, an accurate and computationally efficient forward radiative transfer calculation which is based on the Eddington second-order approximation is used to simulate the passive microwave radiance over land surface. The earth atmosphere environmental condition is ideally divided into six situations: a) Clear Sky, b) Moderate rain widiout snow and graupel, c) Moderate rain with snow and graupel, d) Moderate Rain with heavy snow and graupel, e) Heavy rain with snow and graupel, f) Heavy rain with little graupel, and g) Heavy snow without rain. The corresponding atmospheric influence study has been discussed under different land surface emissivities. As a result, it is found that even at the low frequency band, the contribution of clear-sky atmosphere reach 5.7K at 6.9GHz with the land surface emissivity 0.62. The hydrometeors, such as rain, snow and graupel, play a dominate role because of its emission and scattering regime, and when deal with the heavy rain, snow and graupel, the land surface effect is screened out.
Yubao Qiu Jiancheng Shi Lingmei Jiang Yingying Chen Yongqian Wang
State Key Laboratory of Remote Sensing Sciences, Institute of Remote Sensing Applications,Beijing, C State Key Laboratory of Remote Sensing Sciences, Institute of Remote Sensing Applications,Beijing, C Faculty of Geography and Remote Sensing School of Geography, Beijing Normal University, Beijing, Chi
国际会议
The 12th Conference of the International Association for Mathematical Geology(第12届国际数学地质大会)
北京
英文
481-484
2007-08-26（万方平台首次上网日期，不代表论文的发表时间）