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A Hyperspectral Thermal Infrared Imaging Instrument for Natural Resources Applications
Environnement et Agro-biotechnologies, Centre de Recherche Public-Gabriel Lippmann, 41 Rue du Brill, L-4422 Belvaux, Luxembourg
Remote Sensing & Geoinformatics Department, Faculty of Geography and Geosciences, University of Trier, Behringstrasse, D-54286 Trier, Germany
Telops, 2600 Av. St. Jean Baptiste, Quebec City, QC G2E 6J5, Canada
* Author to whom correspondence should be addressed.
Received: 15 September 2012; in revised form: 3 December 2012 / Accepted: 4 December 2012 / Published: 14 December 2012
Abstract: A new instrument has been setup at the Centre de Recherche Public-Gabriel Lippmann to measure spectral emissivity values of typical earth surface samples in the 8 to 12 μm range at a spectral resolution of up to 0.25 cm−1. The instrument is based on a Hyper-Cam-LW built by Telops with a modified fore-optic for vertical measurements at ground level and a platform for airborne acquisitions. A processing chain has been developed to convert calibrated radiances into emissivity spectra. Repeat measurements taken on samples of sandstone show a high repeatability of the system with a wavelength dependent standard deviation of less than 0.01 (1.25% of the mean emissivity). Evaluation of retrieved emissivity spectra indicates good agreement with reference measurements. The new instrument facilitates the assessment of the spatial variability of emissivity spectra of material surfaces—at present still largely unknown—at various scales from ground and airborne platforms and thus will provide new opportunities in environmental remote sensing.
Keywords: hyperspectral; thermal; long wave; emissivity; imaging spectrometry; sandstone; quartz
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MDPI and ACS Style
Schlerf, M.; Rock, G.; Lagueux, P.; Ronellenfitsch, F.; Gerhards, M.; Hoffmann, L.; Udelhoven, T. A Hyperspectral Thermal Infrared Imaging Instrument for Natural Resources Applications. Remote Sens. 2012, 4, 3995-4009.
Schlerf M, Rock G, Lagueux P, Ronellenfitsch F, Gerhards M, Hoffmann L, Udelhoven T. A Hyperspectral Thermal Infrared Imaging Instrument for Natural Resources Applications. Remote Sensing. 2012; 4(12):3995-4009.
Schlerf, Martin; Rock, Gilles; Lagueux, Philippe; Ronellenfitsch, Franz; Gerhards, Max; Hoffmann, Lucien; Udelhoven, Thomas. 2012. "A Hyperspectral Thermal Infrared Imaging Instrument for Natural Resources Applications." Remote Sens. 4, no. 12: 3995-4009.