Topic: GOES-18 and GOES-19 ABI Lunar Trending Calibration Scans scheduled from September 24 and September 27, 2026

Date/Time Issued:  September 18, 2026 1550Z

Product(s) or Data Impacted: GOES-18 and GOES-19 ABI MESO-2 outages

Date/Time of Initial Impact: September 24, 2026 1451Z J/DAY 267 

Date/Time of Expected End: September 27, 2026 1725Z J/DAY 268

Length of Outage:  Approximately 2 minutes for each event. See the schedule below.

Details/Specifics:

Several, very short, GOES-18 and GOES-19 routine calibration scans for lunar trending will be performed between September 24 and September 27, 2026  . This will result in an outage of ABI MESO-2 products for about 2 minutes for each event. ABI MESO-1 will still be available during this time. The schedules are below:

Impacts:

GOES-18:

·         09/24/2026 (DOY 267) 19:02:10 UTC & 20:03:31 UTC

·         09/25/2026 (DOY 268) 19:32:55 UTC & 21:00:49 UTC

GOES-19:

·          09/24/2026 (DOY 267) 14:51:05 UTC,  & 15:43:11 UTC

·          09/25/2026 (DOY 268) 16:44:07 UTC

·         09/27/2026 (DOY 270) 17:25:03 UTC