RADIOMETRIC CALIBRATION OF THE KOMPSAT-3

ABSTRACT: This paper presents radiometric calibration for KOMPSAT-3. Two approaches are used, one based on vicarious calibration was performed at the Goheung, South Korea. The field campaign initiated on February 21, 2014. The tarp reflectance data obtained were input to a radiative transfer code that predicted at-sensor radiance. For all bands, the coefficient of determination values of the fitted lines exceeded 0.99 between TOA radiances and the spectral band responses of the KOMPSAT-3. The other approach is based on cross calibration between the two sensors using simultaneous image pairs, acquired by these two sensors over the Libya 4 PICS site. Cross calibration was executed based on the Landsat-8 OLI. The results indicate that the TOA reflectance measurements for KOMPSAT-3 agree with Landsat-8 to within 5 % after the application of SBAF. The result of radiometric coefficient presented here appear to be a good standard for maintaining the optical quality of the KOMPSAT-3, for which prelaunch, on-board, and vicarious calibration data are lacking