Theory and precision maintenance method of on-orbit reflectance calibration

被引：0
|
作者：
Huang W. [1 ,2 ]
Zhang L. [1 ,2 ]
Si X. [1 ,2 ]
Cao X. [1 ,2 ]
Zhu X. [1 ,2 ]
Li M. [1 ,2 ]
机构：
[1] Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei, 230031, Anhui
[2] Key Laboratory of Optical Calibration and Characterization, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, 230031, Anhui
来源：
Guangxue Xuebao/Acta Optica Sinica | 2016年 / 36卷 / 06期
关键词：
Bidirectional reflectance distribution function; Integrating sphere; On-orbit calibration; Optical devices; Solar diffuser panel;
D O I：
10.3788/AOS201636.0623001
中图分类号：
学科分类号：
摘要：
The theory of on-orbit reflectance calibration of the solar diffuser panel is expounded and the physical model of on-orbit reflectance calibration is established. As the precision of on-orbit calibration is affected mostly by the degeneration of the solar diffuser's bidirectional reflectance distribution function (BRDF), the method of monitoring the degeneration of BRDF is discussed. According to the monitoring physical model of the solar diffuser stability monitor of the moderate resolution imaging spectroradiometer (MODIS) and the problem founded in the on-orbit performance evaluation, an optical structure of integrating sphere with two imports for light and a baffle inside is proposed. The parameters in its physical model are decreased and some factors that bring uncertainties are cut down while the function can be ensured. It is validated that the optical structure can prevent the sun view response from the ripple signal response in experiment. Based on the physical model of the new optical structure and the domestic testing level, the uncertainty of this system is estimated, and it can be less than 0.68%. © 2016, Chinese Lasers Press. All right reserved.
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页数：8
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