Topic: NOAA 20 VIIRS Lunar Calibration Roll Maneuver Scheduled for December 7, 2019

Date/Time Issued: December 3, 2019 1843Z

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

Date/Time of Initial Impact: December 7, 2019 1838Z

Date/Time of Expected End: December 7, 2019 1940Z

Length of Outage: Approximately 1 hour.

Details/Specifics of change: On December 7, 2019, NOAA-20 will perform a spacecraft attitude maneuver for the VIIRS Lunar Calibration, with a roll of -6.57 degrees centered at 1903Z. 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 2019 December 7 :

18:38:10Z M-bM-^@M-^S 19:40:10Z CERES will be in Contam-Safe and Standby, science data will not be available
18:57:38Z M-bM-^@M-^S 19:10:42Z VIIRS encoder offset and gain will be set for Moon observation
18:58:10Z M-bM-^@M-^S 19:10:10Z 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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