Topic: NOAA-21 VIIRS Lunar Calibration Roll Maneuver Scheduled for January 9, 2025
Date/Time Issued: January 08, 2025 1645Z
Product(s) or Data Impacted: All NOAA 21 Sensor Data
Date/Time of Initial Impact: January 9, 2025 21:12:30Z
Date/Time of Expected End: January 9, 2025 21:26:05Z
Length of Outage: See Details.
Details/Specifics: On January 9, 2025, NOAA-21 will perform a spacecraft attitude maneuver for the VIIRS Lunar Calibration, with a roll of -3.5 degrees centered at 21:18:33Z. 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 January 9, 2025:
21:13:31Z – 21:25:33Z HRD will be off, data for direct broadcast users will be unavailable
21:13:00Z – 21:26:04Z VIIRS encoder offset and gain will be set for Moon observation
21:13:33Z – 21:25:33Z NOAA-21 will be pointing off-nadir, collected data may be impacted and not disseminated
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