Sensitivity analysis of the satellite infrared hyper-spectral atmospheric sounder GIIRS on FY-4A
投稿时间:2020-04-14  修订日期:2020-12-02  download
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农川 华东师范大学地理科学学院上海 200241 200241
尹球 上海市气象局上海 200030
中国气象局气象卫星用户办公室上海 200030 
宋慈 中原工学院理学院河南 郑州 450007
上海大学通信与信息工程学院上海 200444 
束炯 华东师范大学地理科学学院上海 200241 
Abstract:Sensitivity is an important radiation performance index of remote sensor. In this paper, the sensitivity concept of infrared hyper-spectral sounding is extended from the sounder noise sensitivity to the atmospheric parameter sensitivity and the surface temperature error sensitivity for the on-orbit application of sounder. The corresponding sensitivity calculation models and their relations are introduced. These models are applied to the sensitivity evaluation of the first infrared hyper-spectral atmospheric sounder on geostationary meteorological satellite FY-4A GIIRS. With the sounder test data and the atmospheric historical statistical data, we obtained the quantitative variation characteristics of the atmospheric parameters’ sensitivities (atmospheric temperature, water vapor, ozone, CO2, CH4 and N2O), the surface temperature error sensitivity and the sounder noise sensitivity with the channel. The physical mechanisms of these characteristics are analyzed. The results show that, as a whole, the sensitivities of atmospheric temperature, water vapor and ozone are much higher than that of the sounder noise and surface temperature error, while the sensitivities of CO2, CH4 and N2O are submerged by the sounder noise sensitivity and surface temperature error sensitivity. The study lays a foundation for the signal-to-noise ratio evaluation of infrared hyper-spectral atmospheric parameters detection, and is helpful for the optimization of infrared hyper-spectral atmospheric sounding channels.
keywords:Infrared hyper-spectral, atmospheric sounding, sounder noise sensitivity, atmospheric parameter sensitivity, surface temperature error sensitivity
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Copyright:《Journal of Infrared And Millimeter Waves》