Topic: NOAA 20 VIIRS Lunar Calibration Roll Maneuver
Scheduled for April 25, 2018
Date/Time Issued: April 23 2018 2102Z
Product(s) or Data Impacted: All NOAA 20 Sensor Data
Date/Time of Initial Impact: April 25, 2018 19:56:06Z
Date/Time of Expected End: April 25, 2018 20:58:06Z
Length of Outage: See Details.
Details/Specifics of change: On April 25, 2018, NOAA 20 will
perform a spacecraft attitude maneuver for the VIIRS Lunar
Calibration, with a roll of -2.54 degrees centered at 20:21:06Z.
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 2018 April 25:
19:56:06 Z M-bM-^@M-^S 20:58:06 Z M-BCERES will be in Contam-Safe, science data
will not be available
20:15:34 Z M-bM-^@M-^S 20:28:38 Z M-BVIIRS encoder offset and gain will be set
for Moon observation
20:16:06 Z M-bM-^@M-^S 20:28:06 Z M-BNOAA-20 will be pointing off-nadir,
collected data may be impacted and not disseminated
Contact Information for Further Information: ESPC Operations
Web Site(s) for applicable information: N/A
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