The VICIRS (VIcarious Calibration for MWI and ICI using RadioSoundings) study implemented a methodology and developed a vicarious calibration tool for the two conical-scanning radiometers planned to fly from 2025 onwards aboard the METOP-SG (Second Generation) satellites as part of the EUMETSAT Polar System (EPS) program. These radiometers are the Microwave Imager (MWI) and the Ice Cloud Imager (ICI). The tool is designed to search match-ups between MWI/ICI and RS from the high-quality low-density Global Climate Observing System (GCOS) Reference Upper-Air Network (GRUAN) archive, as well as from a lower-quality but higher-density archive, the Radiosounding HARMonization (RHARM) data set. It also handles NWP profiles in order to fill the gap of surface parameters and of data over the RS top levels. A statistical analysis of the difference between observed and simulated BTs, considering the overall uncertainty emerging from the various sources (e.g., instrumental uncertainties, forward model uncertainties, spatial and temporal mismatches) is determined for each MWI/ICI channel.
Development of vicarious calibration tools for MWI and ICI using radiosoundings (VICIRS): final technical report
Domenico Cimini;Maria Pia De Natale;Francesco Di Paola;Luigi Franco;Luisa Galasso;Donatello Gallucci;Sabrina Gentile;Giuseppe Grippo;Salvatore Larosa;Fabio Madonna;Fabrizio Marra;Saverio Teodosio Nilo;Elisabetta Ricciardelli;Ermann Ripepi;Filomena Romano;Marco Rosoldi;Lucia Telesca;Emanuele Tramutola;Mariassunta Viggiano;Michele Volini
2024
Abstract
The VICIRS (VIcarious Calibration for MWI and ICI using RadioSoundings) study implemented a methodology and developed a vicarious calibration tool for the two conical-scanning radiometers planned to fly from 2025 onwards aboard the METOP-SG (Second Generation) satellites as part of the EUMETSAT Polar System (EPS) program. These radiometers are the Microwave Imager (MWI) and the Ice Cloud Imager (ICI). The tool is designed to search match-ups between MWI/ICI and RS from the high-quality low-density Global Climate Observing System (GCOS) Reference Upper-Air Network (GRUAN) archive, as well as from a lower-quality but higher-density archive, the Radiosounding HARMonization (RHARM) data set. It also handles NWP profiles in order to fill the gap of surface parameters and of data over the RS top levels. A statistical analysis of the difference between observed and simulated BTs, considering the overall uncertainty emerging from the various sources (e.g., instrumental uncertainties, forward model uncertainties, spatial and temporal mismatches) is determined for each MWI/ICI channel.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
