Topic: NOAA-21 Drag Make-Up Maneuver (DMU) 009 scheduled for November 5, 2025

Date/Time Issued: October 2,2025 16:52z

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

Date/Time of Initial Impact: November 5, 2025 16:23:25Z

Date/Time of Expected End: November 5, 2025 17:04:12Z

Length of Outage: See Details.

Details/Specifics of Change: On November 5, 2025 16:54:00Z, NOAA-21 will perform a 17.5 second propulsive Drag Makeup Maneuver (DMU) to maintain Mean Local Time of the Ascending Node while controlling the Repeating Ground Track box.

The following observatory systems will be affected on November 5, 2025:

16:38:50Z – 17:03:22Z OMPS in Decon mode, Science data will not be available

16:48:51Z  – 17:04:06Z HRD will be off, data for direct broadcast users will be unavailable

16:48:52Z – 16:59:03Z N21 pointing off-nadir, collected data during that time period may be impacted and not disseminated

Contact Information for Further Information: ESPC Operations at ESPCOperations@noaa.gov at 301-817-3880

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