Topic: N20 Inclination Adjustment Maneuver (IAM) scheduled for March 18, 2021 

Date/Time Issued: March 17, 2021 Time: 17:39Z 

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

Date/Time of Initial Impact: March 18, 2021 16:37:36 

Date/Time of Expected End: March 18, 2021 18:54:13 

Length of Outage:  Approximately 3 hours, 14 minutes. 

Details/Specifics of Change: On March 18, 2021 17:10:36Z, N20 will perform a 356.9 second propulsive Inclination Adjustment Maneuver (IAM) to maintain Mean Local Time of the Ascending Node while controlling Repeating Ground Track box. 

The following observatory systems will be affected on March 18, 2021: 

16:37:36Z – 18:54:13Z CERES in Contam-Safe mode, science data will not be available

16:47:36Z – 17:23:13Z OMPS in Decon mode, Science data will not be available

16:52:36Z - 17:12:24Z HRD will be off, data for direct broadcast users will be unavailable.

16:57:36Z – 17:12:47Z N20 in Control Frame 3 (IAM) (Delta-V Control Frame)

16:57:36Z – 17:26:13Z N20 pointing off-nadir, collected data during that time period may be impacted and not disseminated. ATMS data may be perturbed due to maneuver-induced spacecraft vibrations and its effects on the scan drive. 

Contact Information: ESPC Operations at or 301-817-3880

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

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