Monitoring of the radiometric performance of the GOCI for calibration enhancement

Abstract

in GOCI image, radiometric performance have been monitored by offset parameters and detector temperature estimated , and analyzed from seasonal variation of the spectral radiance by investigating the appearance of a pixel over maximum cloud saturation threshold in GOCI image. In the result, one parameter related to thermal electron, has slightly increasing trend and the diurnal variation, being a high value after noon by sun energy. Although sun interferences are occurred sometimes, GOCI hasn’t shown any significant anomaly. From the analysis of spectral radiance, it is found that the number of saturated pixel has increased in rainy season and it is strong in the image of channel 6(680nm). But they are just below 5000 pixels, corresponding about 0.0002% of the whole in an image.