Topic: GOES-18 SUVI Flat Field Calibrations 

Date/Time Issued: September 25, 2026 1920Z

Product(s) or Data Impacted: GOES-18 SUVI and EXIS Product Outage

Date/Time of Initial Impact: October 02, 2026 (DOY 275) 0140Z

Date/Time of Expected End: October 07,  2026  (DOY 280) 1027Z

Length of Outage: 42 to 99 minutes each day, see details

Details/Specifics:

During the period of  October 02 - October 07, 2026, GOES18 SUVI flat field calibrations will be run each day with each day being a seperate flat field channel. All SUVI products will experience an outage during the calibration. All EXIS products will be flagged for offpoint during the calibration. The outages are listed individually for each day:

094A - October 02, 2026 - 0140 UTC to 0319 UTC - 99 minutes

131A -   October 03, 2026 - 0945 UTC to 1027 UTC - 42 minutes

171A -   October 04, 2026 - 0945 UTC to 1027 UTC - 42 minutes

195A -   October 05, 2026 - 0945 UTC to 1027 UTC - 42 minutes

284A -  October 06, 2026 - 0945 UTC to 1027 UTC - 42 minutes

304A -  October 07, 2026 - 0945 UTC to 1027 UTC - 42 minutes

Contact for Further Information: ESPC Operations: ESPCOperations@noaa.gov or 301-817-3880; GOES Payload Engineering: 301-817-4409 

Web Site(s) for applicable information:

See https://www.ospo.noaa.gov/Operations/messages.html for this and other satellite related messages.

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