Comparison of three calibration techniques for utilization of GER 63-channel aircraft scanner data of Makhtesh Ramon, Negev, Israel : E. Ben-Dor, F. A. Kruse, A. B. Lefkoff & A. Banin, Photogrammetric Engineering & Remote Sensing, 60(11), 1994, pp 1339–1354

Abstract

Geophysical Environmental Research (GER) 63-channel aircraft scanner data were used to map the mineralogy at Makhtesh Ramon in the Negev area of southern Israel. The data were calibrated to apparent reflectance using three techniques; the flat field (FF) method, the empirical line (EL) method, and the internal average relative reflectance (IARR) method. Results of these calibrations were evaluated by extracting image spectra and comparing them to library spectra for pure minerals and to laboratory spectra of samples collected from the field area. These comparisons show that each calibration method produces apparent reflectance spectra that contain useful mineralogical information. Care must be taken, however, to avoid over interpretation, as all of these calibrations may produce spectral artifacts