Topic: S-NPP VIIRS Lunar Calibration Roll Maneuver Scheduled for January 17, 2019

Date/Time Issued: January 15, 2019 16:55Z

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

Date/Time of Initial Impact: January 17, 2019 08:43:01Z

Date/Time of Expected End: January 17, 2019 09:45:01Z

Length of Outage: See Details.

Details/Specifics of change: On January 17, 2019, S-NPP will perform a spacecraft attitude maneuver for the VIIRS Lunar Calibration, with a roll of -5.848 degrees centered at 09:08:01 Z. 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 2019 January 17:

08:43:01 Z M-bM-^@M-^S 09:45:01 Z M-BCERES will be in Contam-Safe, science data will not be available

08:58:01 Z M-bM-^@M-^S 09:20:01 Z M-BHRD will be off, data for direct broadcast users will be unavailable

09:02:31 Z M-bM-^@M-^S 09:15:32 Z M-BVIIRS encoder offset and gain will be set for Moon observation
09:03:01 Z M-bM-^@M-^S 09:15:01 Z M-BS-NPP 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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