A Hyperspectral Thermal Infrared Imaging Instrument for Natural Resources Applications

作者：Schlerf Martin^*; Rock Gilles; Lagueux Philippe; Ronellenfitsch Franz; Gerhards Max; Hoffmann Lucien; Udelhoven Thomas

来源：Remote Sensing, 2012, 4(12): 3995-4009.

DOI：10.3390/rs4123995

• hyperspectral
• thermal
• long wave
• emissivity
• imaging spectrometry
• sandstone
• quartz

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 mu m 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.

• 出版日期2012-12