大气红外探测仪
分光计
遥感
最低点
光学
光辉
成像光谱仪
光谱分辨率
测深
光谱带
红外线的
环境科学
物理
卫星
地质学
谱线
海洋学
天文
标识
DOI:10.1364/orsa.1991.omc1
摘要
AIRS is a high spectral resolution instrument consisting of two pupil imaging, multi-aperture grating spectrometers which provide contiguous spectral coverage from 3.4 to 15.4 μ m, corresponding to 649 - 2941 cm -1 , at a resolving power of 1200. The short-wave spectrometer covers 3.4 - 8 μ m and the long-wave spectrometer 8 - 15.4 μ m. An optical schematic diagram of the spectrometer concept is shown in Figure 1. In addition to the IR spectrometers, the AIRS instrument contains six visible and near IR channels defined by bandpass filters. Every 2.667 seconds, AIRS will scan a ±49.5 degree swath across nadir in a direction perpendicular to the EOS satellite's ground track. The AIRS IFOV is 1.1 degree, providing a 13.5 km footprint at nadir from a 705 km orbital altitude. AIRS focal planes are comprised of linear arrays of mercury cadmium telluride (HgCdTe) detectors cooled to 60 K by a pair of split Sterling cycle coolers. The AIRS instrument will provide the capability to measure nominal scene radiances with a NEAT sensitivity of less than 0.2 K over most of the spectral band.
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