Topic: S-NPP Drag Make-up Maneuver (DMU) scheduled for June 1, 2022


Date/Time Issued: May 31, 2022 1637Z


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


Date/Time of Initial Impact: June 1, 2022 17:00:00


Date/Time of Expected End: June 1, 2022 19:07:04


Length of Outage:  Approximately 2 hours, 7 minutes.


Details/Specifics of Change: On June 1, 2022 at 17:26:00Z, S-NPP will perform a 3.0 second propulsive Drag Make-up 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 June 1, 2022:


17:00:00Z – 19:07:04Z CERES in Contam-Safe mode, science data will not be available

17:10:00Z – 17:38:05Z OMPS in Decon mode, Science data will not be available

17:15:00Z – 17:38:05Z HRD will be off, data for direct broadcast users will be unavailable.

17:20:00Z – 17:26:03Z S-NPP in Control Frame 2 (DMU) (Delta-V Control Frame)

17:20:00Z – 17:33:04Z S-NPP pointing off-nadir, collected data during that time period may be impacted and not disseminated.


Contact Information for Further Information: ESPC Operations at at 301-817-3880


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


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