Topic:Â S-NPP VIIRS Lunar RollÂ

Date/Time Issued:
 February 26, 2015 1940 UTC

Product(s) or Data Impacted:Â
All Suomi-NPP Sensor Data

Date/Time of Initial Impact: Â
March 1, 00:09:22 UTC

Date/Time of Expected End:Â Â
March 1, 01:11:22 UTC

Length of Outage:Â
See Details.

Details/Specifics of Change:Â
Suomi-NPP will perform a spacecraft attitude maneuver, for the VIIRS Lunar Calibration, with a roll of -4.048 degrees centered at 2015-03-01T00:34:22 UTC. 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 2015 March 1:Â


00:09:22 UTC – 01:11:22 UTC  CERES will be in
Contam-Safe, science data will not be available
00:24:22 UTC – 00:46:22 UTC  HRD will be off, data for direct broadcast users will be unavailable

00:28:52 UTC – 00:41:53 UTC  VIIRS encoder offset and gain will be set for Moon observation

00:29:22 UTC – 00:41:22 UTC S-NPP will be pointing off-nadir and collected data during that time period may be impacted


Contact Information for Further Information
: ESPC Operations at ESPCOperations@noaa.gov at 301-817-3880

Web Site(s) for applicable information
: N/A

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