The accurate spectral characterization of high-resolution spectrometers is required for correctly computing, interpreting, and comparing radiance and reflectance spectra acquired at different times or by different instruments. In this paper, we describe an algorithm for the spectral characterization of field spectrometer data using sharp atmospheric or solar absorption features present in the measured data. The algorithm retrieves systematic shifts in channel position and actual full width at half-maximum (FWHM) of the instrument by comparing data acquired during standard field spectroscopy measurement operations with a reference irradiance spectrum modeled with the MODTRAN4 radiative transfer code. Measurements from four different field spectrometers with spectral resolutions ranging from 0.05 to 3.5 nm are processed and the results validated against laboratory calibration. An accurate retrieval of channel position and FWHM has been achieved, with an average error smaller than the instrument spectral sampling interval

Meroni, M., Busetto, L., Guanter, L., Cogliati, S., Crosta, G., Migliavacca, M., et al. (2010). Characterization of fine resolution field spectrometers using solar Fraunhofer lines and atmospheric absorption features. APPLIED OPTICS, 49(15), 2858-2871 [10.1364/AO.49.002858].

Characterization of fine resolution field spectrometers using solar Fraunhofer lines and atmospheric absorption features

MERONI, MICHELE
;
BUSETTO, LORENZO;COGLIATI, SERGIO;CROSTA, GIOVANNI FRANCO FILIPPO;MIGLIAVACCA, MIRCO;PANIGADA, CINZIA;ROSSINI, MICOL;COLOMBO, ROBERTO
2010

Abstract

The accurate spectral characterization of high-resolution spectrometers is required for correctly computing, interpreting, and comparing radiance and reflectance spectra acquired at different times or by different instruments. In this paper, we describe an algorithm for the spectral characterization of field spectrometer data using sharp atmospheric or solar absorption features present in the measured data. The algorithm retrieves systematic shifts in channel position and actual full width at half-maximum (FWHM) of the instrument by comparing data acquired during standard field spectroscopy measurement operations with a reference irradiance spectrum modeled with the MODTRAN4 radiative transfer code. Measurements from four different field spectrometers with spectral resolutions ranging from 0.05 to 3.5 nm are processed and the results validated against laboratory calibration. An accurate retrieval of channel position and FWHM has been achieved, with an average error smaller than the instrument spectral sampling interval
Articolo in rivista - Articolo scientifico
SPECTRAL CALIBRATION; IMAGING SPECTROMETERS; NETWORK; AVIRIS
English
2010
49
15
2858
2871
none
Meroni, M., Busetto, L., Guanter, L., Cogliati, S., Crosta, G., Migliavacca, M., et al. (2010). Characterization of fine resolution field spectrometers using solar Fraunhofer lines and atmospheric absorption features. APPLIED OPTICS, 49(15), 2858-2871 [10.1364/AO.49.002858].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/18556
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