光谱学与光谱分析 |
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Spectral Calibration for Space-Borne Differential Optical Absorption Spectrometer |
ZHOU Hai-jin1, 2, LIU Wen-qing2*, SI Fu-qi2, ZHAO Min-jie2, JIANG Yu2, XUE Hui2 |
1. Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230026, China 2. Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China |
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Abstract Space-borne differential optical absorption spectrometer is used for remote sensing of atmospheric trace gas global distribution. This instrument acquires high accuracy UV/Vis radiation scattered or reflected by air or earth surface, and can monitor distribution and variation of trace gases based on differential optical absorption spectrum algorithm. Spectral calibration is the premise and base of quantification of remote sensing data of the instrument, and the precision of calibration directly decides the level of development and application of the instrument. Considering the characteristic of large field, wide wavelength range, high spatial and spectral resolution of the space-borne differential optical absorption spectrometer, a spectral calibration method is presented, a calibration device was built, the equation of spectral calibration was calculated through peak searching and regression analysis, and finally the full field spectral calibration of the instrument was realized. The precision of spectral calibration was verified with Fraunhofer lines of solar light
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Received: 2012-05-10
Accepted: 2012-07-15
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Corresponding Authors:
LIU Wen-qing
E-mail: wqliu@aiofm.ac.cn
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