Topic: NOAA-20 VIIRS Lunar Calibration Roll Maneuver Scheduled for November 12, 2024

Date/Time Issued: November 7, 2024 1820Z

Product(s) or Data Impacted:  All NOAA-20 Sensor Data

Date/Time of Initial Impact: November 12, 2024 03:16:15Z

Date/Time of Expected End: November 12, 2024 04:18:15Z

Length of Outage:  See Details.

Details/Specifics of change: On November 12, 2024, NOAA-20 will perform a spacecraft attitude maneuver for the VIIRS Lunar Calibration, with a roll of -4.5 degrees centered at 03:41:15Z. Science data may be impacted while the spacecraft is pointing off-nadir during the attitude maneuver and the CERES instrument will not provide nominal science data as it will placed in a contamination safe mode.  The timeline of events for this maneuver are provided below.

The following observatory systems will be affected on 2024 November 12th:

03:16:15Z – 04:18:15Z CERES will be in Contam-Safe and Standby, science data will not be available

03:31:15Z – 03:53:15Z HRD will be off, data for direct broadcast users will be unavailable
03:35:43Z – 03:48:47Z VIIRS encoder offset and gain will be set for Moon observation
03:36:15Z – 03:48:15Z NOAA-20 will be pointing off-nadir, collected data may be impacted and not disseminated 

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