| 光谱学与光谱分析 |
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| Study on the Non-Uniformity Calibration of Space-Born Differential Optical Absorption Spectrometer |
| ZHAO Min-jie1, ZOU Ying2, SI Fu-qi1*, LU Yi-huai1, WANG Yu1, WANG Shi-mei1, ZHOU Hai-jin1, ZENG Yi1, LIU Wen-qing1 |
1. Key Laboratory of Environmental Optics and Technology，Anhui Institute of Optics and Fine Mechanics，Chinese Academy of Sciences，Hefei 230031，China
2. Shanghai Academy of Spaceflight Technology, Shanghai 201109, China |
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Abstract Space-borne differential optical absorption spectrometer is a nadir viewing wide field imaging spectrometer, which adopts two-dimensional CCD detector arrays. The pixel response non-uniformity exists in each column of spatial dimension, which will introduce high-frequency instrument-related spectral structures in the measurement data. However, the non-uniformity calibration of space-born imaging spectrometer is difficulty due to two factors: the spectral smile effect and the large field of view. For this reason, a method of non-uniformity calibration is discussed in detail. The result shows that the spectral smile effect and non-uniformity of full FOV image are corrected effectively, and high-frequency instrument-related structures in the measurement data are removed.
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Received: 2014-11-19
Accepted: 2015-03-25
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Corresponding Authors:
SI Fu-qi
E-mail: sifuqi@aiofm.ac.cn
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