Topic: NOAA 20 VIIRS Lunar Calibration Roll Maneuver Scheduled for December 11, 2024

Date/Time Issued: December 6, 2024 1959Z

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

Date/Time of Initial Impact: December 11, 2024 1225Z

Date/Time of Expected End: December 11, 2024 1327Z

Length of Outage:  See Details.

Details/Specifics : On December 11, 2024, NOAA-20 will perform a spacecraft attitude maneuver for the VIIRS Lunar Calibration, with a roll of -9 degrees centered at 12:50:58Z. 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 be 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 December 11th:

12:25:58Z – 13:27:58Z CERES will be in Contam-Safe and Standby, science data will not be available
12:45:26Z – 12:58:30Z VIIRS encoder offset and gain will be set for Moon observation
12:45:58Z – 12:57:58Z NOAA-20 will be pointing off-nadir, collected data may be impacted and not disseminated 

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