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Proceedings Paper

Wavelength calibration of imaging spectrometer using atmospheric absorption features
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Paper Abstract

Imaging spectrometer is a promising remote sensing instrument widely used in many filed, such as hazard forecasting, environmental monitoring and so on. The reliability of the spectral data is the determination to the scientific communities. The wavelength position at the focal plane of the imaging spectrometer will change as the pressure and temperature vary, or the mechanical vibration. It is difficult for the onboard calibration instrument itself to keep the spectrum reference accuracy and it also occupies weight and the volume of the remote sensing platform. Because the spectral images suffer from the atmospheric effects, the carbon oxide, water vapor, oxygen and solar Fraunhofer line, the onboard wavelength calibration can be processed by the spectral images themselves. In this paper, wavelength calibration is based on the modeled and measured atmospheric absorption spectra. The modeled spectra constructed by the atmospheric radiative transfer code. The spectral angle is used to determine the best spectral similarity between the modeled spectra and measured spectra and estimates the wavelength position. The smile shape can be obtained when the matching process across all columns of the data. The present method is successful applied on the Hyperion data. The value of the wavelength shift is obtained by shape matching of oxygen absorption feature and the characteristics are comparable to that of the prelaunch measurements.

Paper Details

Date Published: 30 November 2012
PDF: 7 pages
Proc. SPIE 8558, Optoelectronic Imaging and Multimedia Technology II, 85582C (30 November 2012); doi: 10.1117/12.1000068
Show Author Affiliations
Jiankang Zhou, Soochow Univ. (China)
Yuheng Chen, Soochow Univ. (China)
Xinhua Chen, Soochow Univ. (China)
Yiqun Ji, Soochow Univ. (China)
Weimin Shen, Soochow Univ. (China)

Published in SPIE Proceedings Vol. 8558:
Optoelectronic Imaging and Multimedia Technology II
Tsutomu Shimura; Guangyu Xu; Linmi Tao; Jesse Zheng, Editor(s)

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