Centre de documentation
scientifique

Refinement of wavelength calibrations of hyperspectral imaging data using a spectrum-machine technique / B.C. Gao in Remote sensing of environment, vol 90 n° 4 (30/04/2004)  

Public [article]  inRemote sensing of environment > vol 90 n° 4 (30/04/2004) . - pp 424 - 433 Titre : Refinement of wavelength calibrations of hyperspectral imaging data using a spectrum-machine technique Type de document : Article/Communication Auteurs : B.C. Gao, Auteur ; M.J. Montes, Auteur ; C.O. Davis, Auteur Année de publication : 2004 Article en page(s) : pp 424 - 433 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] capteur multibande [Termes IGN] étalonnage radiométrique [Termes IGN] étalonnage spectral [Termes IGN] image hyperspectrale [Termes IGN] longueur d'onde [Termes IGN] spectre électromagnétique [Termes IGN] spectromètre imageur Résumé : (Auteur) The concept of imaging spectrometry, or hyperspectral imaging, is becoming increasingly popular in scientific communities in recent years. Hyperspectral imaging data covering the spectral region between 0.4 and 2.5 um and collected from aircraft and satellite platforms have been used in the study of the earth's atmosphere, land surface, and ocean color properties, as well as on planetary missions. In order to make such quantitative studies, accurate radiometric and spectral calibrations of hyperspectral imaging data are necessary. Calibration coefficients for all detectors in an imaging spectrometer obtained in a laboratory may need to be adjusted when applied to data obtained from an aircraft or a satellite platform. Shifts in channel center wavelengths and changes in spectral resolution may occur when an instrument is airborne or spaceborne due to vibrations, and to changes in instrument temperature and pressure. In this paper, we describe an algorithm for refining spectral calibrations of imaging spectrometer data using observed features in the data itself. The algorithm is based on spectrum-matching of atmospheric water vapor, oxygen, and carbon dioxide bands, and solar Fraunhofer lines. It has been applied to real data sets acquired with airborne and spaceborne imaging spectrometers. Numéro de notice : A2004-189 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2003.09.002 En ligne : https://doi.org/10.1016/j.rse.2003.09.002 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26716 [article]