Topic: S-NPP VIIRS Lunar Calibration Roll Maneuver Scheduled for November 12, 2024
Date/Time Issued: November 7, 2024 1816Z
Product(s) or Data Impacted: All S-NPP Sensor Data
Date/Time of Initial Impact: November 12, 2024 02:51:57Z
Topic: S-NPP VIIRS Lunar Calibration Roll Maneuver Scheduled for November 12, 2024
Date/Time Issued: November 7, 2024 18:08z
Product(s) or Data Impacted: All S-NPP Sensor Data
Date/Time of Initial Impact: November 12, 2024 02:51:57Z
Date/Time of Expected End: November 12, 2024 03:53:57Z
Length of Outage: See Details.
Details/Specifics of change: On November 12, 2024, S-NPP will perform a spacecraft attitude maneuver for the VIIRS Lunar Calibration, with a roll of -4.5 degrees centered at 03:16:57Z. 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 November 12, 2024 :
02:51:57Z – 03:53:57Z CERES will be in Contam-Safe and Standby, science data will not be available
03:06:57Z – 03:28:57Z HRD will be off, data for direct broadcast users will be unavailable
03:11:27Z – 03:24:28Z VIIRS encoder offset and gain will be set for Moon observation
03:11:57Z – 03:23:57Z S-NPP will be pointing off-nadir, collected data may be impacted and not disseminated
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