S-NPP VIIRS Lunar Calibration with Roll Maneuver Jan 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 - 09:45:01 Z CERES will be in Contam-Safe, science data will not be available
08:58:01 Z - 09:20:01 Z HRD will be off, data for direct broadcast users will be unavailable
09:02:31 Z - 09:15:32 Z VIIRS encoder offset and gain will be set for Moon observation
09:03:01 Z - 09:15:01 Z S-NPP will be pointing off-nadir, collected data may be impacted and not disseminated