Update #1: During NPP Orbit 34655
(AOS 002506Z), the recovery of VIIRS and CRIS instruments were
completed. Instruments are running nominally. No other recovery
commanding will be executed. IDPS will attempt to reprocess data
that is recoverable, however some VIIRS data may be
unrecoverable.
Topic: SNPP VIIRS and CrIS reset and recovery
Date/Time Issued: July 6, 2018 0107Z
Product(s) or Data Impacted: SNPP VIIRS and CrIS Sensor
data
Date/Time of Initial Impact: Jul 5, 2018 1920Z
Date/Time of Expected End: Jul 5, 2018 2300Z
Length of Outage: see details
Details/Specifics of Change:
SNPP VIIRS suffered an uncorrectable error and TMON 37 tripped
causing swap of 1394 Bus from side B to side A. At AOS of SVL
34652, the CrIS 1394 bus also showed a reset and the CDP root node
will need to be recovered. Engineering team is conducting
recovery for the next 3 orbits between 19:20 - 2300, and will
affect VIIRS and CrIS data. VIIRS instrument will be safed,
reset, and both CrIS and VIIRS will be configured back to
operation.
Affected orbits are:
SVL 34652: 19:20 - 19:31: VIIRS safed and recycled, VIIRS placed
in Op day and producing all data in all bands, including more data
during night.
SVL 34653: 21:02 - 21:15
SVL 34653: 22:43 - 22:58
Additional orbits may be required.
Some data may not transferred to users because it did not meet
their timeliness requirements.
Contact Information for Further Information: ESPC
Operations at ESPCOperations@noaa.gov
and 301-817-3880
Web Site(s) for applicable information: N/A
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