Research on the accuracy of spectral calibration using atmospheric absorption features with different water vapor contents

Lin Li; Yong Hu; Cailan Gong; Yueming Wang; Xuezhuan Ding; Huaying He; Lingya Zhu

doi:10.1117/12.964396

15 October 2012 Research on the accuracy of spectral calibration using atmospheric absorption features with different water vapor contents

Lin Li, Yong Hu, Cailan Gong, Yueming Wang, Xuezhuan Ding, Huaying He, Lingya Zhu

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Proceedings Volume 8420, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical System Technologies for Manufacturing and Testing; 84200X (2012) https://doi.org/10.1117/12.964396
Event: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2012), 2012, Xiamen, China

Abstract

Nowadays, spectrometers are being increasingly used in the remote sensing of the earth system processes and they can be well conducted field spectral calibrated by using absorption features of atmospheric profile. The spectral calibration accuracy of an ASD spectrometer in different atmospheric conditions is analyzed in this paper. First of all, set the atsensor spectral radiance spectrum as the reference spectral curve, which is generated by the MODTRAN5 radiative transfer model outputs convolved with the spectral response function of each channel. The results can be totally different when input different water vapor contents. Meanwhile, under the same atmospheric conditions (the same observation target, the sun elevation angle, azimuth, aerosol distribution, composition and concentration distribution of atmosphere..etc. ), the diffuser whiteboard is measured by the ASD spectrometer to acquire observed spectral curve. The best spectral matching algorithm is used to compare the observed spectrum with the reference one. Central wavelength of the ASD is obtained by calculating the results of matching spectrum shifts within feature spectrum range. Finally, quantitative analysis and calculation about the effect on the accuracy of instrument spectral calibration with different water vapor contents is presented.

Citation Download Citation

Lin Li, Yong Hu, Cailan Gong, Yueming Wang, Xuezhuan Ding, Huaying He, and Lingya Zhu "Research on the accuracy of spectral calibration using atmospheric absorption features with different water vapor contents", Proc. SPIE 8420, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical System Technologies for Manufacturing and Testing, 84200X (15 October 2012); https://doi.org/10.1117/12.964396

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KEYWORDS

Absorption

Spectral calibration

Spectrometers

Calibration

Atmospheric modeling

Oxygen

Atmospheric particles

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