Effect analysis of spectral calibration error of space-borne imaging spectrometer

Ming Li; Jun Ma

doi:10.1117/12.2032877

30 August 2013 Effect analysis of spectral calibration error of space-borne imaging spectrometer

Ming Li, Jun Ma

Proceedings Volume 8910, International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Spectrometer Technologies and Applications; 89100U (2013) https://doi.org/10.1117/12.2032877
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

Abstract

The spectral calibration of the space-borne imaging spectrometer is the basis of establishing correct spectral features of the earth scenery and carrying out accurate radiometric calibration. The spectral calibration error has effects on the measurement errors of the imaging spectrometer while imaging to the earth, the onboard radiometric calibration and the on-ground radiometric calibration with integrating sphere. The calculation model of the measurement error of the imaging spectrometer caused by the spectral calibration error is given. An imaging spectrometer used in marine satellite is given as an example, which uses a grating spectrometer and an array CCD to measure spectra from 400nm to 950nm. In the cases of different spectral calibration errors, the measurement errors in different seasons, solar altitude angles and surface albedoes while imaging to the north hemisphere mid-latitude area and the effects of the measurement errors on the water leaving irradiance retrieval accuracy are calculated for each band, the measurement errors while onboard radiometric calibration and the effects of the measurement errors on the absolute calibration accuracy are calculated for each band, and the measurement errors while on-ground radiometric calibration with integrating sphere and the effects of the measurement errors on the absolute calibration accuracy are calculated for each band. The spectral calibration error requirement of ±0.5nm is determined by calculation. The imaging spectrometer has good performances in this spectral calibration error.

Citation Download Citation

Ming Li and Jun Ma "Effect analysis of spectral calibration error of space-borne imaging spectrometer", Proc. SPIE 8910, International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Spectrometer Technologies and Applications, 89100U (30 August 2013); https://doi.org/10.1117/12.2032877

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KEYWORDS

Spectral calibration

Calibration

Spectroscopy

Integrating spheres

Error analysis

Sensors

Absorption

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