Topic: S-NPP Drag Make-Up (DMU-042) Maneuver Scheduled for November 20, 2024

Date/Time Issued: November 18, 2024 1939Z

Product(s) or Data Impacted: All S-NPP Sensor Data

Date/Time of Initial Impact: November 20, 2024 17:57:00Z

Date/Time of Expected End: November 20, 2024 20:04:04Z

Length of Event: See Details.

Details/Specifics: On November 20, 2024 at 18:23:00z, S-NPP will perform a 4.0 second propulsive Drag Make-Up Maneuver (DMU) to maintain the Repeating Ground Track box.

The following observatory systems will be affected on November 20, 2024:

17:57:00Z – 20:04:04Z CERES in Contam-Safe mode, science data will not be available

18:07:00Z – 18:34:06Z OMPS in Decon mode, Science data will not be available

18:12:00Z – 18:35:05Z HRD will be off, data for direct broadcast users will not be available

18:17:00Z – 18:25:04Z S-NPP in Control Frame 2 (DMU) (Delta-V Control Frame)

18:17:00Z – 18:30:04Z S-NPP pointing off-nadir, collected data during that time period may be impacted and not disseminated

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