Topic: NOAA 20 VIIRS Lunar Calibration Roll Maneuver Scheduled for January 21, 2024

Date/Time Issued: January 18, 2024 1720Z

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

Date/Time of Initial Impact: January 21, 2024  05:51:48Z

Date/Time of Expected End: January 21, 2024  06:53:48Z 

Length of Outage: See Details.

Details/Specifics of change: On January 21, 2024, NOAA-20 will perform a spacecraft attitude maneuver for the VIIRS Lunar Calibration, with a roll of -1.25 degrees centered at 06:16:48Z. 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 January 21st:
05:51:48Z – 06:53:48Z CERES will be in Contam-Safe and Standby, science data will not be available
06:11:17Z – 06:24:19Z VIIRS encoder offset and gain will be set for Moon observation
06:11:48Z – 06:23:48Z NOAA-20 will be pointing off-nadir, collected data may be impacted and not disseminated 

Contact Information for Further Information: ESPC Operations at ESPCOperations@noaa.gov and 301-817-3880.    

Web Site(s) for Applicable Information: N/A

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