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北京空间机电研究所,北京 100094
[ "崔程光(1988-),男,北京人,博士,高级工程师,2011年于南开大学获得学士学位,2016年于中国科学院长春光学精密机械与物理研究所获得博士学位,主要从事紫外光学遥感技术与定量化遥感的研究。E-mail: chgcui@126.com" ]
[ "李 凌(1986-),男,北京人,高级工程师,2008年于北京工业大学获得学士学位,2012年于北京航空航天大学获得硕士学位,主要从事大口径光学成像技术的研究。E-mail: lilingalpha@163.com" ]
收稿日期:2020-10-12,
修回日期:2020-11-18,
纸质出版日期:2021-03-15
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崔程光,李凌,李云飞等.静轨紫外可见高光谱探测仪星上外定标方案[J].光学精密工程,2021,29(03):484-492.
CUI Cheng-guang,LI Ling,LI Yun-fei,et al.External calibration methods for geosynchronous ultraviolet-visible hyperspectral instrument[J].Optics and Precision Engineering,2021,29(03):484-492.
崔程光,李凌,李云飞等.静轨紫外可见高光谱探测仪星上外定标方案[J].光学精密工程,2021,29(03):484-492. DOI: 10.37188/OPE.2020.0522.
CUI Cheng-guang,LI Ling,LI Yun-fei,et al.External calibration methods for geosynchronous ultraviolet-visible hyperspectral instrument[J].Optics and Precision Engineering,2021,29(03):484-492. DOI: 10.37188/OPE.2020.0522.
紫外可见高光谱探测仪搭载于地球同步轨道卫星,具备高时间分辨率、高光谱分辨率、长寿命周期等特点。研究其星上外定标方案,消除内定标装置衰减等变化带来的影响,是实现遥感器在轨高精度定标或检校的重要手段。本文结合静止轨道卫星的特点,建立了紫外可见高光谱探测仪辐射特性分析流程,比较了不同外定标方案的特点及它在地球同步轨道卫星上的可行性,提出并分析了一种采用太阳定标、月球定标和恒星定标相结合的高光谱探测仪在轨绝对辐射定标方案。定标不确定度分析表明,太阳定标不确定度为3.6%,恒星定标不确定度为3.87%,基于月球定标漫反射板监测不确定为3.55%,满足在轨定标要求。
A geosynchronous ultraviolet-visible hyper-spectral instrument (GUVI) is deployed into a geosynchronous Earth orbit (GEO). The GUVI has high temporal and spectral resolution as well as a long lifespan. Accordingly, the research into in-orbit calibration methods is crucial to eliminating the influence of attenuation on the precision of the internal calibration device. Consequently, highly precise calibration of orbiting sensors was achieved; this ensured that GUVI remained reliable in orbit. Solar, lunar, and stellar calibration along with a GEO were proposed based on the simulation. Then an absolute in orbit radiometric calibration comprising solar and stellar calibration was proposed; the diffuser monitor was based on lunar calibration. Thus, an external calibration program was determined. Further, the corresponding equations were formulated considering the signal-to-noise ratio of stellar calibration. Finally, the uncertainties of solar, lunar, and stellar calibrations were computed as 3.6%, 3.87%, and 3.55%, respectively, thus meeting the requirements of on-orbit calibration.
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