Topic: NOAA 20 VIIRS Lunar Calibration Roll Maneuver Scheduled for February 15, 2019

Date/Time Issued: February 14, 2019 19:30Z

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

Date/Time of Initial Impact: February 15, 2019 22:21:09Z

Date/Time of Expected End: February 15, 2019 23:17:09Z

Length of Outage: See Details.

Details/Specifics of change: On February 15, 2019, NOAA 20 will perform a spacecraft attitude maneuver for the VIIRS Lunar Calibration, with a roll of -1.35 degrees centered at 22:44:09Z. 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:

22:21:09Z M-bM-^@M-^S 23:17:09Z M-BCERES will be in Contam-Safe, science data will not be available
22:40:37Z M-bM-^@M-^S 22:47:41Z M-BVIIRS encoder offset and gain will be set for Moon observation
22:41:09Z M-bM-^@M-^S 22:47:09 Z M-BNOAA-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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