In-orbit radiometric performance variations of geostationary ocean color imager

Abstract

Radiometric performance variations of GOCI have been analyzed through the time series analysis, using offset parameters and detector temperature estimated in GOCI radiometric model. In the result, there wasn’t great variation in time series of two parameters since July 2010, but an anomaly by an operational event. One of them related to thermal electron showed slightly increasing trend and the diurnal variation. High value was found after noon by the sun energy. Although sun interferences are occurred sometimes, any significant anomaly isn’t found. By these characterization results, we find that GOCI has been carrying out stably in the aspect of radiometric performance and expect that it will be kept during the mission life, unless an external affect.