Date/Time Issued: January 3, 2020 1740Z

Product(s) or Data Impacted: All S-NPP Sensor Data

Date/Time of Initial Impact: January 6, 2020 14:51:46Z

Date/Time of Expected End: January 6, 2020 15:53:46Z

Length of Outage: See Details.

Details/Specifics of change: On January 6, 2020, S-NPP will perform a spacecraft attitude maneuver for the VIIRS Lunar Calibration, with a roll of -6.45 degrees centered at 15:16:46Z. 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 6, 2020:

14:51:46 Z M-bM-^@M-^S 15:53:46 ZM-B CERES will be inM-BContam-Safe and Standby, science data will not be available

15:06:46 Z M-bM-^@M-^S 15:28:46 ZM-B HRD will be off, data for direct broadcast users will be unavailable

15:11:16 Z M-bM-^@M-^S 15:24:15 ZM-B VIIRS encoder offset and gain will be set for Moon observation
15:11:46 Z M-bM-^@M-^S 15:23:46 ZM-B S-NPP will be pointing off-nadir, collected data may be impacted and not disseminated

Contact Information for Further Information:M-BESPC Operations atM-BESPCOperations@noaa.govM-Band 301-817-3880

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

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