Topic: Suomi-NPP VIIRS Lunar Calibration Roll Maneuver
Date/Time Issued: December 18, 2015 1535Z
Product(s) or Data Impacted: Suomi-NPP Sensor Data
Date/Time of Initial Impact: December 21, 2015 1310Z
Date/Time of Expected End: December 21, 2015 1412Z
Length of Outage: 1 hour
Details/Specifics of Change: Suomi-NPP will perform a spacecraft attitude maneuver, for the VIIRS Lunar Calibration, with a roll of -8.1760 degrees, centered at 2015-12-21T13:35:44 UTC. 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 2015 December 21:
13:10:44 UTC - 14:12:44 UTC CERES will be in Cotam-Safe, science date will not be available
13:25:44 UTC - 13:47:44 UTC HRD willbe off, data for direct broadcast users will be unavailable
13:30:14 UTC - 13:43:15 UTC VIIRS encoder offset and gain will be set for Moon observation
13:30:44 UTC - 13:42:44 UTC S-NPP will be pointing off-nadir and collected data during that time period may be impacted
Contact Information for Further Information: ESPC Operations at ESPCOperations@noaa.gov at 301-817-3880