travis.sadecki@LIGO.ORG - posted 03:11, Friday 21 April 2017 - last comment - 10:50, Friday 21 April 2017(35702)
EY CRC Error 9:51 UTC
Verbal Alarms announced an "EY CRC Error" at 9:51 UTC. Following Dave's instructions, I successfully restarted the HofT calibration code. GWIstat is now reporting that LHO is green and "OK+Intent", where before it was yellow and "HofT Bad". The DMT SPI page never showed an issue with the calibration (it was always green). I'll check the Detchar summary page when it refreshes to make sure it has greened up.
Travis, Greg, Dave:
Many thanks to Travis for getting all this running again in the early hours of this morning. The mx_stream of data coming from h1susey was interrupted for 23 data blocks (@16 blocks per second, 1.44 seconds) at 09:51 UTC 4/21 (02:51 PDT). The DAQ made all SUS EY channels invalid for this period. The DMT calibration code (because of a code bug) latched all H1 HofT data as being invalid from this point onwards until Travis restarted the code on h1dmt0 and h1dmt1. Greg has confirmed that these restarts caused no problems downstream. The attached Det-Char summary plot shows the HofT latching to invalid (RED 'Calibration' and 'Observing' with a GREEN 'Obs intent'), and then shows the problem being resolved soon after.
Sunday's event was at 03:07 PDT, this morning's at 02:51 PDT