Topic: S-NPP VIIRS Lunar Calibration Roll Maneuver Scheduled for December 11, 2024
Date/Time Issued: December 06, 2024 2001Z
Product(s) or Data Impacted: All S-NPP Sensor Data
Date/Time of Initial Impact: December 11, 2024 12:02:49Z
Date/Time of Expected End: December 11, 2024 13:04:49Z
Length of Event: See Details.
Details/Specifics: On December 11, 2024, S-NPP will perform a spacecraft attitude maneuver for the VIIRS Lunar Calibration, with a roll of -9.5 degrees centered at 12:27:49Z. 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 December 11, 2024 :
12:02:49Z – 13:04:49Z CERES will be in Contam-Safe and Standby, science data will not be available
12:17:49Z – 12:39:49Z HRD will be off, data for direct broadcast users will be unavailable
12:22:19Z – 12:35:20Z VIIRS encoder offset and gain will be set for Moon observation
12:22:49Z – 12:34:49Z S-NPP will be pointing off-nadir, collected data may be impacted and not disseminated
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