Topic: NOAA 20 VIIRS Lunar Calibration Roll Maneuver Scheduled for May 22, 2021
Date/Time Issued: May 21, 2021 2000Z
Product(s) or Data Impacted: All NOAA 20 Sensor Data
Date/Time of Initial Impact: May 22, 2021 19:08:52Z
Date/Time of Expected End: May 22, 2021 20:04:52Z
Length of Outage: See Details.
Details/Specifics
of change: On May 22, 2021, NOAA-20 will perform a spacecraft attitude
maneuver for the VIIRS Lunar Calibration, with a roll of -1.72 degrees
centered at 19:31:52Z. 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 2021 May 22:
19:08:52Z – 20:04:52Z CERES will be in Contam-Safe and Standby, science data will not be available
19:28:20Z – 19:35:24Z VIIRS encoder offset and gain will be set for Moon observation
19:28:52Z
– 19:34:52Z NOAA-20 will be pointing off-nadir, collected data may be
impacted and not disseminated. ATMS data may be perturbed due to
maneuver-induced spacecraft vibrations
Web Site(s) for applicable information: N/A
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