Recent operational status of GSICS GEO-LEO and GEO-GEO Inter-Calibrations at NOAA/NESDIS

The Global Space-based Inter-Calibration System (GSICS), initiated by World Meteorological Organization (WMO) and Coordination Group for Meteorological Satellites (CGMS) in 2005, is an international collaborative effect with the mission to produce consistent and accurate measurements from the constellation of operational meteorological satellites by inter calibration between a variety of different instruments. NOAA GSICS Processing and Research Center (GPRC), located at NOAA/NESDIS, has been conducted the GSICS-related processing and research to ensure the quality of radiance measured with NOAA satellites, as well as the international satellite instruments. In this paper, we summarized most recent activities conducted at NOAA GSICS GPRC in monitoring and improving the Geostationary (GEO) infrared (IR) calibration accuracy, especially the GOES Imager and Sounder instruments.