多角度偏振辐射计星上定标光源

Light resource of on-board calibration for multi-angle polarized radiometer

多角度偏振辐射计是一种对地观测的辐射偏振测量仪器。仪器提供的多波段、多角度、全偏振信息主要用于环境大气监测、气候变迁研究、大气科学研究、地球辐射收支平衡研究和遥感数据高精度大气校正,为确定气溶胶对气候的驱动作用和区域大气气溶胶状态及其变化提供高精度数据。针对这一需求,提出了多角度偏振辐射计星上定标器的设计方案。首先介绍了多角度偏振辐射计的研制背景、星上定标技术的产生原因以及国外星上定标器的设计方案。重点阐述了多角度偏振辐射计星上定标器的设计,包括光学设计、机械设计和电路设计,解释说明了各部分的功能和作用以及相关参数。最后对提高星上定标精度提出了几点建议。

The multi-angle polarized radiometer is a measurement instrument for earth observation.It was applied to the polarization measurement.The instrument is intended to provide multi-spectrum,multi-angle and full polarized information.The applications of the instrument include environmental atmosphere monitoring,research on climate variations,on atmospheric sciences,on global radiance balance and high accuracy atmospheric correction.It can supply the high accuracy data,which will help to study of the relationship between aerosols and climate,and the variation of aerosols.Compared with the ground calibration,the technique of on-board calibration has the advantages of improving the measurement accuracy.Aiming at this requirement,the design scheme of multi-angle polarized radiometer was proposed.Firstly,the research background of multi-angle polarized radiometer,the cause of on-board calibration technique and the foreign design scheme of on-board calibrator were introduced.Then,the design of optics,mechanics,and electrics were emphasized particularly,and the functions,roles and related parameters of all parts of the system were explained.Finally,some suggests for improving the calibration accuracy were given.