Topic: NOAA 20 VIIRS Lunar Calibration Roll Maneuver Scheduled for May 25, 2018

Date/Time Issued: May 23, 2018 2022Z

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

Date/Time of Initial Impact: May 25, 2018 0530Z

Date/Time of Expected End: May 25, 2018 0626Z

Length of Outage: See Details.

Details/Specifics of change: On May 25, 2018, NOAA-20 will perform a spacecraft attitude maneuver for the VIIRS Lunar Calibration, with a roll of -1.5837 degrees centered at 05:53:06Z. 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 2018 May 25:

05:30:06 Z M-bM-^@M-^S 06:26:06 Z CERES will be in Contam-Safe, science data will not be available
05:49:34 Z M-bM-^@M-^S 05:56:38 Z VIIRS encoder offset and gain will be set for Moon observation
05:50:06 Z M-bM-^@M-^S 05:56:06 Z NOAA-20 will be pointing off-nadir, collected data may be impacted and not disseminated

Contact Information for Further Information: ESPC Operations at and 301-817-3880

Web Site(s) for applicable information: N/A

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