Topic: N20 Drag Make-Up Maneuver (DMU) scheduled for September 25, 2024

Date/Time Issued: September 23, 2024 1826Z

Product(s) or Data Impacted: All N20 Sensor Data

Date/Time of Initial Impact: September 25, 2024 15:55:00Z

Date/Time of Expected End: September 25,2024 18:02:40Z

Length of Outage: See Details.

Details/Specifics of Change: On September 25, 2024 16:21:00Z, N20 will perform a 5.0 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 September 25, 2024:

15:55:00Z – 18:02:40Z CERES in Contam-Safe mode, science data will not be available

16:05:00Z – 16:31:10Z OMPS in Decon mode, Science data will not be available

16:10:00Z  –   16:33:10Z HRD will be off, data for direct broadcast users will be unavailable

16:15:00Z – 16:23:10Z N20 in Control Frame 2 (DMU) (Delta-V Control Frame)

16:15:00Z – 16:28:10Z 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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