Topic: NOAA-20 VIIRS Lunar Calibration Roll Maneuver Scheduled for January 9, 2025

Date/Time Issued: January 08, 2025 1632Z

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

Date/Time of Initial Impact: January 9, 2025 21:42:20Z

Date/Time of Expected End: January 9, 2025 22:44:20Z

Length of Outage: See Details.

Details/Specifics: On January 9, 2025, NOAA-20 will perform a spacecraft attitude maneuver for the VIIRS Lunar Calibration, with a roll of -3 degrees centered at 22:07:20Z. 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 January 9, 2025:
21:42:20Z – 22:44:20Z CERES will be in Contam-Safe and Standby, science data will not be available
21:57:20Z – 22:19:20Z HRD will be off, data for direct broadcast users will be unavailable
22:01:48Z – 22:14:52Z VIIRS encoder offset and gain will be set for Moon observation
22:02:20Z – 22:14:20Z NOAA-20 will be pointing off-nadir, collected data may be impacted and not disseminated

This notification was sent to ESPC.Notification@noaa.gov mailing list. If you wish to unsubscribe or subscribe to this list, please contact ESPC Help-Desk at ESPCOperations@noaa.gov with your request. Please note: it may take up to two business days to process your request. For any additional information you can reach ESPC at 301-817-3880 (24x7)