Topic: GOES-18 (GOES-WEST) ABI Encoder and FTE Calibrations 

Date/Time Issued: April 06, 2026 1839Z 

Product(s) or Data Impacted: GOES-18 ABI product outage

First Outage:

Date/Time of Initial Impact: April 15, 2026 1830Z (DOY 105)

Date/Time of Expected End: April 15, 2026 1900Z (DOY 105)

Second Outage:

Date/Time of Initial Impact: April 15, 2026 2000Z (DOY 105) 

Date/Time of Expected End: April 15, 2026 2030Z (DOY 105)

Length of Outage:  30 minutes of product outage, about 1 hour of scanning, followed by another 30 minute product outage

Details/Specifics of Change:

A GOES-18 ABI Encoder and FTE Calibration will be performed on April 15, 2026, at 1830Z resulting in two ABI product outages. Products may be degraded between outages. 

On Tuesday, April 15, 2026 the following schedule will be employed to support GOES-18 ABI Encoder and FTE Calibrations:

1830 UTC - 1900 UTC: GOES 18 ABI Outage

1900 UTC - Approximately 2000 UTC: GOES-18 Routine ABI Operations Resume with potentially degraded products 

Approximately 2000 UTC - Approximately 2030 UTC: GOES-18 ABI outage

Approximately 2030 UTC: GOES-18 Routine ABI Operations Resume

Please note: If Critical Weather Day (CWD) is declared prior to 1830 UTC the calibration will be postponed.

Web Site(s) for applicable information:

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