Spectral irradiance calibration research of the solar backscattered ultraviolet spectroradiometer in air/vacuum conditions

被引：0
|
作者：
Yang, Xiaohu [1 ,2 ]
Wang, Shurong [1 ]
Huang, Yu [1 ]
机构：
[1] Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun
[2] Graduate University of Chinese Academy of Sciences
来源：
Guangxue Xuebao/Acta Optica Sinica | 2012年 / 32卷 / 01期
关键词：
Al+MgF [!sub]2[!/sub] coating; Radiometric calibration; Remote sensing; Solar backscattered ultraviolet spectroradiometer; Spectral irradiance calibration;
D O I：
10.3788/AOS201232.0101004
中图分类号：
学科分类号：
摘要：
A group of improving methods for the on-ground calibration of solar backscattered ultraviolet spectroradiometer (SBUS) has been put forward to increase its precision of on-board detection and data inversion. The full-waveband radiometric calibration in vacuum, which can attain correspondence match of condition between on-ground calibration and on-board detection, is the first item. A spectral irradiance responsibility comparing measurement setup is built and the spectral irradiance response of SBUS to a same source is measured in air and vacuum, respectively. The result shows a 0.8% relative deviation between air and vacuum in 250-300 nm and a wavelength dependent deviation, among which the maximum is a little more than 15%, in 300-400 nm. The individual uncertainty caused by calibration condition of SBUS in vacuum is 1.8% smaller than that in air. After theoretical analysis and confirmatory testing, it is found that the spectral reflectivity of Al+MgF 2 coating of SBUS reflecting element would be different in air and in vacuum, which proves the necessity of SBUS calibration in vacuum condition.
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页码：0101004 / 1
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