Topic: NPP Inclination Adjustment Maneuver (IAM) scheduled for April 13, 2023

Date/Time Issued: April 12, 2023 1845Z

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

Date/Time of Initial Impact: April 13, 2023 1615Z

Date/Time of Expected End: April 13, 2023 1833Z

Length of Outage: ~ 2 hours 19 minutes.

Details/Specifics of Change: On April 13, 2023 16:48:49Z, NPP will perform a 242.3 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 April 13, 2023:

16:15:49Z – 18:33:51Z CERES in Contam-Safe mode, science data will not be available

16:25:49Z – 17:09:53Z OMPS in Decon mode, Science data will not be available

16:30:49Z – 17:10:52Z HRD will be off, data for direct broadcast users will be unavailable.

16:35:49Z – 16:52:51Z Slew maneuver to -91.3 deg Yaw

16:35:49Z – 17:05:51Z Slew back to Nadir Attitude - 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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