Correction: Removed information in signature

Topic: NOAA-21 Inclination Adjustment Maneuver (IAM) 002 scheduled for April 15th, 2026

Date/Time Issued: April 13th, 2026 20:15Z 2029Z

Product(s) or Data Impacted: All NOAA-21 Sensor Data

Date/Time of Initial Impact: April 15th, 2026 16:14:09Z

Date/Time of Expected End: April 15th, 2026 16:51:42Z

Length of Outage: See Details.

Details/Specifics: April 15th, 2026 at 16:34:23Z

NOAA-21 will perform a 91.57 second propulsive Inclination Adjustment Maneuver (IAM)

to maintain Mean Local Time of the Ascending Node while controlling the Repeating Ground Track box.

The following observatory systems will be affected on April 15th, 2026:

16:14:09Z – 16:44:43Z OMPS in Decon mode, Science data will not be available

16:24:09Z – 16:51:42Z HRD will be off, data for direct broadcast users will be unavailable

16:24:16Z – 16:46:42Z NOAA-21 pointing off-nadir, collected data during that time period may

be impacted and not disseminated

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