Retrieval of Land-surface Temperature from AMSR2 Data Using a Deep Dynamic Learning Neural Network  

作　　者：MAO Kebiao ZUO Zhiyuan SHEN Xinyi XU Tongren GAO Chunyu LIU Guang 

机构地区：[1]National Hulunber Grassland Ecosystem Observation and Research Station, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences [2]State Key Laboratory of Remote Sensing Science, Institute of Remote sensing and Digital Earth Research, Chinese Academy of Science and Beijing Normal University [3]College of Resources and Environments, Hunan Agricultural University [4]Hydrometeorology and Remote Sensing Laboratory, University of Oklahoma

出　　处：《Chinese Geographical Science》2018年第1期1-11,共11页中国地理科学（英文版）

基　　金：Under the auspices of National Natural Science Foundation of China(No.41571427);National Key Project of China(No.2016YFC0500203);Open Fund of State Key Laboratory of Remote Sensing Science(No.OFSLRSS 201515)

摘　　要：It is more difficult to retrieve land surface temperature(LST) from passive microwave remote sensing data than from thermal remote sensing data, because the emissivities in the passive microwave band can change more easily than those in the thermal infrared band. Thus, it is very difficult to build a stable relationship. Passive microwave band emissivities are greatly influenced by the soil moisture, which varies with time. This makes it difficult to develop a general physical algorithm. This paper proposes a method to utilize multiple-satellite, sensors and resolution coupled with a deep dynamic learning neural network to retrieve the land surface temperature from images acquired by the Advanced Microwave Scanning Radiometer 2(AMSR2), a sensor that is similar to the Advanced Microwave Scanning Radiometer Earth Observing System(AMSR-E). The AMSR-E and MODIS sensors are located aboard the Aqua satellite. The MODIS LST product is used as the ground truth data to overcome the difficulties in obtaining large scale land surface temperature data. The mean and standard deviation of the retrieval error are approximately 1.4° and 1.9° when five frequencies(ten channels, 10.7, 18.7, 23.8, 36.5, 89 V/H GHz) are used. This method can effectively eliminate the influences of the soil moisture, roughness, atmosphere and various other factors. An analysis of the application of this method to the retrieval of land surface temperature from AMSR2 data indicates that the method is feasible. The accuracy is approximately 1.8° through a comparison between the retrieval results with ground measurement data from meteorological stations.It is more difficult to retrieve land surface temperature（LST） from passive microwave remote sensing data than from thermal remote sensing data, because the emissivities in the passive microwave band can change more easily than those in the thermal infrared band. Thus, it is very difficult to build a stable relationship. Passive microwave band emissivities are greatly influenced by the soil moisture, which varies with time. This makes it difficult to develop a general physical algorithm. This paper proposes a method to utilize multiple-satellite, sensors and resolution coupled with a deep dynamic learning neural network to retrieve the land surface temperature from images acquired by the Advanced Microwave Scanning Radiometer 2（AMSR2）, a sensor that is similar to the Advanced Microwave Scanning Radiometer Earth Observing System（AMSR-E）. The AMSR-E and MODIS sensors are located aboard the Aqua satellite. The MODIS LST product is used as the ground truth data to overcome the difficulties in obtaining large scale land surface temperature data. The mean and standard deviation of the retrieval error are approximately 1.4° and 1.9° when five frequencies（ten channels, 10.7, 18.7, 23.8, 36.5, 89 V/H GHz） are used. This method can effectively eliminate the influences of the soil moisture, roughness, atmosphere and various other factors. An analysis of the application of this method to the retrieval of land surface temperature from AMSR2 data indicates that the method is feasible. The accuracy is approximately 1.8° through a comparison between the retrieval results with ground measurement data from meteorological stations.

关 键 词：RADIOMETRY Advanced Microwave Scanning Radiometer 2 （AMSR2） passive remote sensing inverse problem 

分 类 号：P407[天文地球—大气科学及气象学]