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&#160;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 &#956;m range at a spectral resolution of up to 0.25 cm&#8722;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&#8212;at present still largely unknown&#8212;at various scales from ground and airborne platforms and thus will provide new opportunities in environmental remote sensing

A Hyperspectral Thermal Infrared Imaging Instrument for Natural Resources Applications