In-Orbit Observation of the Second Generation Global Imager (SGLI) and Study Towards Follow-on Imaging Radiometer

Global Change Observation Mission (GCOM) consists of two series of satellites, GCOM-W (Water) and GCOM-C (Climate) for long-term monitoring of earth environment. Second-generation Global Imager (SGLI), the onboard mission instrument of GCOM-C, is the wide FOV multispectral optical radiometer in the wavelength range of near-UV to thermal infrared. SGLI is providing high accuracy measurements of Ocean, Atmosphere, Land and Cryosphere. JAXA successfully launched the GCOM-C satellite on December 23, 2017 and completed the one-year initial calibration activities. The various GCOM-C scientific products have been released to public since December, 2018. This paper describes SGLI in-orbit radiometric calibration and performance summary and also the status of follow-on mission concept study.