Topic: NPP Inclination Adjustment Maneuver (IAM) scheduled for November 18, 2021

Date/Time Issued: November 18, 2021 1615z

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

Date/Time of Initial Impact: November 18, 2021 17:31:27z

Date/Time of Expected End: November 18, 2021 19:48:03z

Length of Outage: See details

Details/Specifics of Change: On November 18, 2021 18:04:27z, S-NPP will perform a 156.0 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 November 18, 2021:

17:31:27z – 19:48:03Z CERES in Contam-Safe mode, science data will not be available

17:41:27z – 18:24:05Z OMPS in Decon mode, Science data will not be available

17:46:27z – 18:25:03z HRD will be off, data for direct broadcast users will be unavailable.

17:51:27z – 18:07:03z S-NPP in Control Frame 3 (IAM) (Delta-V Control Frame)

17:51:27z – 18:20:03z S-NPP pointing off-nadir, collected data during that time period may be impacted and not disseminated

Contact Information: For information on the status of this work, please contact SPSD.Userservices@noaa.gov and ESPC Operations at ESPCOperations@noaa.gov or 301-817-3880

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

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