Monitoring radiometric performance of EUMETSAT operational missions: MSG/SEVIRI, MTG-I/FCI, and Sentinel-3/OLCI&SLSTR (Conference Presentation)

Accurate satellite measurements depend on rigorous radiometric performance monitoring for reliability and precision in data collection. EUMETSAT achieves this through ongoing monitoring of operational missions using vicarious calibration and inter-calibration systems. <br/> <br/> Vicarious calibration and inter-calibration techniques employ natural targets, such as warm deserts, the Moon, Deep Convective Clouds (DCC), and dark oceans, to transfer calibration from a radiometric reference to the monitored mission. These methods are indispensable for instruments like MSG/SEVIRI, lacking an on-board calibration device for solar channels, yet widely used for monitoring and validating the radiometric performance of on-board calibration systems. <br/> <br/> This paper presents the routine radiometric calibration monitoring of MTG-I1/FCI, MSG/SEVIRI and Sentinel-3 OLCI and SLSTR Level-1 products using our multi-mission tool, Mission Integrated Calibration Monitoring and Inter-Calibration System (MICMICS). The monitoring process encompasses diverse calibration targets, such as desert sites, DCC, lunar observations, and inter-comparisons with other reference instruments, enhancing the overall assessment.