A COMPARISON OF THERMAL INFRARED EMISSIVITY SPECTRA MEASURED IN-SITU,IN THE LABORATORY, AND DERIVED FROM THERMAL INFRARED MULTISPECTRAL SCANNER (TIMS) DATA IN CUPRITE, NEVADA, USA

In order to obtain ground truth data for multispectral thermal infrare d sensors such as TIMS and ASTER, in situ spectral emissivity measurem ents were made during field surveys. These spectral emissivity measure ments and laboratory spectral reflectance measurements of held samples were compared to emissivity spectra extracted from TIMS data at the s urveyed points. The results indicate that emissivity spectra derived f rom the TIMS data agree well in shape with the spectra measured in sit u or in the laboratory.