Chao LIN, Cheng-liang LI, Long WANG, et al. Preflight spectral calibration of hyperspectral carbon dioxide spectrometer of TanSat[J]. Optics and precision engineering, 2017, 25(8): 2064-2075.
DOI:
Chao LIN, Cheng-liang LI, Long WANG, et al. Preflight spectral calibration of hyperspectral carbon dioxide spectrometer of TanSat[J]. Optics and precision engineering, 2017, 25(8): 2064-2075. DOI: 10.3788/OPE.20172508.2064.
Preflight spectral calibration of hyperspectral carbon dioxide spectrometer of TanSat
In order to realize spectral calibration for TanSat's hyperspectral Carbon Dioxide Spectrometer (CDS)
a calibration system was established and relevant methodology such as design of the system
data acquisition and algorithms of data processing and etc was investigated. Based on the sounding principle
CDS's spectral requirements were presented. Design of calibration system and the adopted equipments was described. Then after the scheme of Orbiting Carbon Observatory's spectral calibration was compared
the modified methods such as automatic data acquisition
rotatable integrating sphere
power and dark calibration was analyzed. Finally
the methods of data processing were described as well. Experimental results indicate that the ILS concentration radios of CDS are more than 0.80
0.81
0.78 respectively and the intervals of FWHM are 0.039 2-0.042 4 nm
0.123-0.128 nm
0.157-0.168 nm respectively. The intervals of spectral sampling are 2.12-2.95
1.97-2.27
1.92-2.26 respectively. The comparison of on-orbit solar spectra indicate that the difference of central wavelength are less than 0.001 3
0.058
0.065 nm respectively. It can satisfy the system requirements of CDS.
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references
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