摘要
结合全球大气晴空训练样本(CIMSS)数据,利用辐射传输模式,模拟获得干涉式大气垂直探测仪(GIIRS)亮温资料,结合人工神经网络反演方法,研究了风云四号(FY-4)卫星高光谱红外载荷大气温度反演方法,并研制了全圆盘和中国区域两套大气温度反演模型。反演试验结果表明:对流层大气温度反演精度明显高于平流层,以中国区域反演模型为例,对流层和平流层大气温度反演均方根误差(RMSE)分别为0.846,2.020K,平均误差分别为-0.003,0.024K;比较中国区域和全圆盘大气温度廓线反演精度,中国区域大气温度精度明显高于全圆盘,0~70km处大气温度反演的均方根误差分别为1.922,2.630K;与欧洲极轨卫星(Metop-A)IASI数据的温度廓线反演结果比较,FY-4A星GIIRS的温度反演精度在低层(>500hPa)(RMSE=0.790 K)优于IASI(RMSE=0.976K),在高层(<500hPa)(RMSE=1.803K)低于IASI(RMSE=0.899K)。研究对FY-4卫星GIIRS的大气温度廓线反演及其应用有重要的参考价值。
In this paper,the radiation transfer model was used to calculate the brightness temperature data of Geostationary Infrared Interferometer Sounder（GIIRS）based on the data by the Cooperative Institute for Meteorological Satellite Studies（CIMSS）,and the artificial neural network method was applied to build the atmospheric temperature retrieval systems of disc and Chinese regions based on the GIIRS hyperspectral infrared data.The retrieval results show that the atmospheric temperature estimation precision of troposphere is obviously higher than that of stratosphere,the root mean square errors（RMSE）of retrieved atmospheric temperature in the troposphere and stratosphere are 0.846 K and 2.020 K,and the average errors are-0.003 K and 0.024 K respectively.Compared with total disc area,the RMSE of the retrieval model in Chinese region is apparently better,the RMSE of retrieved atmospheric temperature over 0~70km is 1.922 K,however,the RSME is 2.630 Kin the total disc area.Compared with IASI from European polar satellite（Metop-A）,the atmospheric temperature estimation precision of FY-4A satellite GIIRS in the lower layers（〉500hPa）（RMSE=0.790K）is better than IASI（RMSE=0.976 K）,but（RMSE=1.803 K）is worse than IASI（RMSE=0.899 K）in high layers（〈500hPa）.The study has important value for the retrieval and application of atmosphere temperature profiles from GIIRS based on FY-4A satellite.
出处
《上海航天》
CSCD
2017年第4期28-37,共10页
Aerospace Shanghai
基金
"六大人才高峰"高层次人才项目资助(2015-JY-013)
国家重点研发计划资助(2016YFA0600703)
上海航天科技创新基金资助(F-201509-0066)
关键词
FY-4卫星
干涉式大气垂直探测仪(GIIRS)
神经网络
温度廓线
反演
对流层
平流层
中国区域
全圆盘
FY-4 meteorological satellite
Geostationary Infrared Interferometer Sounder（GIIRS）
neural network
temperature profile
retrieval
stratosphere
troposphere
Chinese region
total disc area
