红外与毫米波学报, 2018, 37 (5): 545, 网络出版: 2018-12-26
FY-4A大气垂直探测仪(GIIRS)温度探测通道优选
Channel selection of atmosphere vertical sounder (GIIRS) onboard the FY-4A geostationary satellite
风云四号A 干涉式大气垂直探测仪 通道优选 红外高光谱 信息容量 FY-4A interferometric atmospheric vertical detector channel selection infrared hyperspectral information content
摘要
针对中国第二代静止气象卫星风云四号(FY-4A)的干涉式大气垂直探测仪(GIIRS), 从信息容量的角度, 运用分步迭代法, 以及精确型辐射传输模式LBLRTM, 进行温度探测通道优选试验。计算得到在全球范围反演温度廓线的56个优选通道以及FY-4A探测范围的58个优选通道, 所选通道自身信息容量较高, 相互之间相关性小, 可应用于大气温度廓线反演和数据同化研究。
Abstract
Channel selection experiments for the retrieval of temperature have been carried out using the data obtained by GIIRS (the hyperspectral vertical detector equipped on the FY-4A geostationary satellite). According to information capacity, using line-by-line radiative transfer model, channels are selected by step-by-step iterative method. Finally, sensitive channels using for retrieval of temperature profile are selected, 56 channels in global and 58 in FY-4A’s detection range. The selected channels have small correlation with each other, and they have higher information capacity, which can be used as the representative channel set for temperature profile retrieval research and data assimilation.
杨雨晗, 尹球, 束炯. FY-4A大气垂直探测仪(GIIRS)温度探测通道优选[J]. 红外与毫米波学报, 2018, 37(5): 545. YANG Yu-Han, YIN Qiu, SHU Jiong. Channel selection of atmosphere vertical sounder (GIIRS) onboard the FY-4A geostationary satellite[J]. Journal of Infrared and Millimeter Waves, 2018, 37(5): 545.