Topic:  NOAA-20 Drag Make-Up Maneuver (DMU) scheduled for April 02, 2025

Date/Time Issued: April 1, 2025 1210Z

Product(s) or Data Impacted:  All NOAA-20 Sensor Data

Date/Time of Initial Impact: April 02, 2025 1653Z

Date/Time of Expected End: April 02, 2025 1940Z

Length of Outage:  See Details.

Details/Specifics of Change: On April 02, 2025 17:19:00Z,
NOAA-20 will perform a 5.0 second propulsive Drag Makeup Maneuver (DMU)
to maintain Mean Local Time of the Ascending Node while controlling Repeating Ground Track box.
The following observatory systems will be affected on April 02, 2025:

• 16:53:32Z – 19:00:40Z  CERES in Contam-Safe mode, science data will not be available
• 17:04:00Z – 17:29:10Z  OMPS in Decon mode, Science data will not be available
• 17:08:00Z – 17:12:24Z  HRD will be off, data for direct broadcast users will be unavailable
• 17:13:00Z – 17:19:05Z  N20 in Control Frame 2 (DMU) (Delta-V Control Frame)
• 17:13:00Z – 17:26:10Z  N20 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

Web Site(s) for applicable information: N/A

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