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A sensitivity study for the calibration of hyperspectral spectrometer on board the geostationary multipurpose satellite of Korea

Title
A sensitivity study for the calibration of hyperspectral spectrometer on board the geostationary multipurpose satellite of Korea
Authors
Ahn M.-H.Kang M.Liu X.Kim J.
Ewha Authors
안명환
SCOPUS Author ID
안명환scopus
Issue Date
2015
Journal Title
Proceedings of SPIE - The International Society for Optical Engineering
ISSN
0277-786XJCR Link
Citation
vol. 9535
Keywords
Best fittingGEMSGEO-KOMPSATSensitivity testsSpectral Calibration
Publisher
SPIE
Indexed
SCOPUS scopus
Abstract
A spectral calibration algorithm for the hyperspectral geostationary environmental monitoring spectrometer (GEMS) onboard GEO-KOMPSAT-2B (GK-2B) planned to launch in 2019 has been developed. Although spectral registration for the CCD detector is done by the optical parameters prepared during the ground test of the instrument, the algorithm is applied for the improved spectral accuracy. The prototype algorithm is based on the best fitting of the measured spectrum to the known high resolution reference spectrum such as the solar irradiance. To characterize the prototype algorithm, a series of sensitivity tests for various spectral parameters, such as squeeze, shift, spectral response function, and reference solar spectrum, has been performed. The prototype algorithm shows a minimal sensitive to the uncertainties associated with several parameters such as squeeze, shift, or spectral band. However, the algorithm performance degrades by an order if the spectral response function including its shape has uncertainty. Thus, it is recommended to measure the spectral response function at the ground test as accurately as possible. Furthermore, the prototype algorithm is also highly sensitive to the used reference solar spectrum, which needs further investigation. © 2015 Copyright SPIE.
DOI
10.1117/12.2192534
ISBN
9781628417005
Appears in Collections:
일반대학원 > 대기과학공학과 > Journal papers
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