摘要
大气红外探测仪AIRS的核心是一个光栅光谱仪序列,2378个红外探测器分装在17个探测器序列上,本文以实例说明了由于探测器序列在视轴方向有偏移,即空间错误定位误差给AIRS的观测值带来的影响及其光谱分布特征,以及观测值误差对后继红外晴空订正和大气廓线反演的影响.建议以后在设计同类仪器时要避免探测器序列错误定位问题,或选用干涉式分光系统.
The heart of atmospheric infrared sounder （AIRS） instrument is a cooled array grating spectrometer operating over the range of 3.7 ～ 15.4μm. The assembly consists of 17 arrays. Within these 17 detector arrays, there are 2378 individual detectors. Spatial centroid offsets, or imperfect alignments（ spatial co-misregistration）, of these 17 arrays, indicate large discontinuities between most of both the longwave and shortwave arrays. We demonstrate that the co-misregistration error of AIRS might significantly handicap the optimal utilities of the AIRS data in cloud-clearing radiances for sounding retrieval and other future utilizations such as data assimilation.
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第2期153-156,共4页
Journal of Infrared and Millimeter Waves
基金
国家自然科学基金(40605009)资助项目
关键词
红外
高光谱
大气红外探测仪
定位误差
infrared
hyperspectra
atmospheric infrared sounder（AIRS）
co-misregistration error
