Topic: NOAA-20 VIIRS Lunar Calibration Roll Maneuver Scheduled for May 7, 2025
Date/Time Issued: May 02, 2025 14:40:00Z
Product(s) or Data Impacted: All NOAA-20 Sensor Data
Date/Time of Initial Impact: May 7, 2025 21:48:57Z J/Day 127
Date/Time of Expected End: May 7, 2025 22:50:57Z
J/Day 127
Length of Outage: See Details.
Details/Specifics: On May 7, 2025 , NOAA-20 will perform a spacecraft attitude maneuver for the VIIRS Lunar Calibration, with a roll of -3 degrees centered at 22:13:57Z. 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 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 2025 May 7th:
21:48:57Z – 22:50:57Z CERES will be in Contam-Safe and Standby, science data will not be available
22:03:57Z – 22:25:57Z HRD will be off, data for direct broadcast users will be unavailable
22:08:25Z – 22:21:29Z VIIRS encoder offset and gain will be set for Moon observation
22:08:57Z – 22:20:57Z NOAA-20 will be pointing off-nadir, collected data may be impacted and not disseminated
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