Subject: MissionNotice MN022489 SNPP VIIRS SBC Lock-up Anomaly 9/26/2014
Description_Title: SNPP VIIRS SBC Lock-up Anomaly 9/26/2014
MN_ID: MN022489
Date_Time: 2014-09-26 19:20:58
Mission_Notice_Text: Mission Notice Status: New
Description:
On 2014-09-26 approximately 16:21:24 UTC VIIRS stopped outputting science data. At 16:41:07 UTC (AOS SVL 15100) controllers reported multiple VIIRS and 1394 bus alarms to engineers. During the back orbit engineering verified the state of theVIIRS instrument and began preparations for recovery. The VIIRS Single Board Computer (SBC) Lock-up recovery is being executed during SVL 15101-15104. During SVL 15101 (18:24:35 - 18:35:07 UTC) VIIRS was power-cycled and science data resumed at approximately 18:35 UTC but may be degraded for multiple orbits. All VIIRS DNB data will be degraded prior to SVL 15104 when the VIIRS DNB tables are expected loaded.
Impact: Loss of VIIRS Data
Site/Spacecraft Affected: SNPP - Loss of VIIRS Data
Date/Time Start: 2014-09-26 T16:21:24 UTC (approximate)
Date/Time Stop: 2014-09-26 T23:44:36 UTC (expected - TBD)
Duration: TBD