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CHRIS是欧空局于2001年10月成功发射的PROBA卫星上搭载的探索性高光谱遥感器,它共有5种可选择的作业模式,在可见光到近红外(0.4～1.05μm)范围,最多可以获取62个波段.文中采用基于图像自身的大气校正方法(模型法ACORN和经验法),在图像上选取最具代表性的植被和土壤光谱,对CHRIS这一新型的航天成像光谱仪进行了光谱与辐射性能评价.计算显示,ACORN校正得到的玉米反射率在498～750nm波长区间能够较好地表征植被的反射率光谱特征(如红边特征),尤其是在对气溶胶敏感的蓝光部分比经验方法更有优势,但是在750nm之后就有很大偏差,表明CHRIS在750nm之后的波段存在光谱定标误差;土壤光谱反射率在800nm之后有递减的误差趋势,表明CHRIS在部分波长区间还不能满足模型法大气校正的要求;ACORN反演得到的水汽含量分布图上存在的竖条纹,则表明CHRIS的辐射定标性能的不足.CHRIS仪器作为欧空局第一个真正意义上的航天高光谱遥感器在光谱和辐射性能上仍有待改善.
CHRIS is the Exploratory Hyperspectral Remote Sensor that was launched on the PROBA satellite successfully launched by ESA in October 2001. It has a total of five selectable modes of operation that can operate in the visible to near infrared (0.4-1.05 μm) range up to And 62 bands were obtained.In this paper, atmospheric correction based on the image itself (model method ACORN and empirical method) was used to select the most representative vegetation and soil spectra on the image, CHRIS new space imaging spectrometer spectral and The radiation performance evaluation shows that the ACORN corrected corn reflectivity can characterize the reflectance spectral characteristics (such as the red edge feature) of the vegetation in the 498-750 nm wavelength range, especially in the aerosol-sensitive blue light region than the experience Method is more advantageous, but there is a great deviation after 750 nm, indicating that CHRIS has spectral calibration errors in the band after 750 nm. The soil spectral reflectance has a decreasing error trend after 800 nm, indicating that CHRIS can not meet the requirement in some wavelength ranges Model atmospheric correction requirements; ACORN inversion of the water vapor content distribution of the vertical stripes exist on the chart, it shows CHRIS radiative calibration performance deficiencies .RIS instrument As ESA spacecraft hyperspectral remote sensor on the first truly on the spectrum and radiation performance still room for improvement.