Date/Time Issued: January 17, 2019 1925 UTC

Product(s) or Data Impacted: Meteosat-11 Data and Products

Date/Time of Initial Impact: January 18, 2019 1700 UTC

Date/Time of Expected End: January 31, 2019 1700 UTC

Length of Event: 14 days

Details/Specifics of Change: From January 21 - 28, 2019, EUMETSAT plans to perform a decontamination of the Meteosat-11 (Prime satellite; 0 degrees longitude) SEVIRI instrument. Meteosat-11 data will be interrupted during this time period and Meteosat-9 data will be disseminated as a backup data source to the 0 degree mission. Meteosat-9 data will be available from EUMETSAT through 0900 UTC, February 4, 2019.

Since EUMETSAT's switch to Meteosat-9 will occur at 0900 UTC on a U.S. federal holiday, January 21, NOAA/NESDIS plans to switch its McIDAS operations to only Meteosat-9 data distribution (no Meteosat-11 data) effective 1700 UTC, January 18, 2019. The switch to exclusive Meteosat-9 data distribution at NOAA/NESDIS should not impact NOAA McIDAS users unless your data processing precisely keys on "Meteosat-11" or SSID "354."

Please inform NOAA if this would cause any issues for you at the time of the switch at 1700 UTC, January 18, 2019.