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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 15 — May. 20, 2010
  • pp: 2858–2871

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

Michele Meroni, Lorenzo Busetto, Luis Guanter, Sergio Cogliati, Giovanni Franco Crosta, Mirco Migliavacca, Cinzia Panigada, Micol Rossini, and Roberto Colombo  »View Author Affiliations


Applied Optics, Vol. 49, Issue 15, pp. 2858-2871 (2010)
http://dx.doi.org/10.1364/AO.49.002858


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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.

© 2010 Optical Society of America

OCIS Codes
(120.4640) Instrumentation, measurement, and metrology : Optical instruments
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(300.0300) Spectroscopy : Spectroscopy

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: February 25, 2010
Revised Manuscript: April 2, 2010
Manuscript Accepted: April 2, 2010
Published: May 14, 2010

Citation
Michele Meroni, Lorenzo Busetto, Luis Guanter, Sergio Cogliati, Giovanni Franco Crosta, Mirco Migliavacca, Cinzia Panigada, Micol Rossini, and Roberto Colombo, "Characterization of fine resolution field spectrometers using solar Fraunhofer lines and atmospheric absorption features," Appl. Opt. 49, 2858-2871 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-15-2858

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