Compact high-resolution imaging spectrometer (CHRIS) design and performance
Compact high-resolution imaging spectrometer (CHRIS) design and performance
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DOI：
10.1117/12.560962
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发表时间：
2004-10
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影响因子：
--
通讯作者：
M. Cutter
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文献类型：
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作者：
M. Cutter
本文介绍了一个紧凑型高分辨率成像光谱仪（CHRIS）在SIRA开发。成像光谱仪搭载于PROBA，这是一颗小型敏捷卫星，于2001年发射。本文提供了仪器的设计和性能的细节。该仪器的主要目的是提供陆地图像，特别是利用多角度观测测量地球表面选定目标的双向反射分布函数特性。该平台提供了跨轨和沿轨方向的指向，用于目标采集、BRDF和气溶胶测量，并在成像期间提供慢速俯仰，以增加仪器的积分时间。这种积分时间的增加提高了目标辐射分辨率。仪器覆盖的光谱范围从400 nm延伸到1050 nm。该平台绕地球运行，远地点为673公里，近地点为560公里。在远地点的空间采样间隔约为17米。在这种模式下，可以读出19个光谱带。光谱带的位置和宽度是可编程的。可选择的片上集成可以将频带数增加到63，空间采样间隔为34 m。在近地点拍摄的条带宽度为13公里。
This paper describes a Compact High Resolution Imaging Spectrometer (CHRIS) developed at Sira. The imaging spectrometer is flying on PROBA, a small agile satellite, which was launch in 2001. This paper provides details of the instrument design and performance. The main purpose of the instrument is to provide images of land areas, particularly the measurement of the Bi-directional Reflectance Distribution Function (BRDF) properties for selected targets on the Earth surface using multi-angle observations. The platform provides pointing in both across-track and along-track directions, for target acquisition, BRDF and aerosol measurements and slow pitch during imaging in order to increase the integration time of the instrument. This increase in integration time enhances the target radiometric resolution. The spectral range covered by the instrument extends from 400nm to 1050nm. The platform orbits the Earth with an apogee of 673km and a perigee of 560km. The spatial sampling interval at apogee is approximately 17m. In this mode it is possible to readout 19 spectral bands. The location and width of the spectral bands are programmable. Selectable on-chip integration can increase the number of bands to 63 for a spatial sampling interval of 34m. The swath width imaged is 13km at perigee.