NOAA-21 VIIRS Lunar Calibration Roll Maneuver Scheduled for December 01, 2025
12/1/25
5:59
6:12
V
ESPC Operations Notice
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On December 01, 2025, NOAA-21 will perform a spacecraft attitude maneuver for the VIIRS Lunar Calibration. Science data may be impacted while the spacecraft is pointing off-nadir during the attitude maneuver. The timeline of events for this maneuver are provided below.
The following observatory systems will be affected on December 01, 2025 during the Lunar Roll Activity :
06:00:20z - 06:12:22z HRD will be off, data for direct broadcast users will be unavailable
05:59:50z - 06:12:53z VIIRS encoder offset and gain will be set for Moon observation
06:00:22z - 06:12:22z NOAA-21 will be pointing off-nadir, collected data may be impacted and not disseminated