Topic: NOAA-20 ATMS planned outage due to Electrically Erasable Programmable Read-Only Memory (EEPROM) data write activity.

Date/Time Issued: September 22, 2025 2137Z

Product(s) or Data Impacted: NOAA-20 ATMS Products

Date/Time of Initial Impact: October 22, 2025 Time TBD

Date/Time of Expected End: October 22, 2025 Time TBD

Length of Outage: 1 Rev (about 115 minutes)

Details/Specifics: All NOAA-20 ATMS data and its derived products will not be available while the EEPROM write activity is being executed. This planned outage is necessary to verify load success before returning ATMS to operational. An update will be sent out closer to the activity date in order to provide accurate outage times.

Contact information for further information: ESPC Operations at ESPCOperations@noaa.gov or 301-817-3880 24x7 or goes-r.product.engineering.group@noaa.gov during normal business hours

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