18:31:36-18:32:58 Out of OBSERVING
Once again H1 was dropped out of OBSERVING (for ~82 secs) due to the another case of the laser unlocking (lasted ~6hrs since last occurence) as mentioned in Jim's shifts. Saw same symptoms as Jim:
- Nothing on SDF: This is not an issue due to SDF dropping us out, it is due to a Monitored Guardian Node NOT being in a NOMINAL state.
- "Monitored Nodes" list on the Observation Intent Bit screen listed 1 Guardian Node as "NOT OK": the TCS_ITM_CO2 guardian node.
- Opened up TCS_ITM_CO2 Guardian Node it was actively trying to relock the laser all on its own (SDF was fine and green through this).
- Guardian Log looks similar to what Jim posted earlier today.
[Aidan]
TCS crew is looking into this.
The issue of the TCS CO2 laser reacquiring lock is a known operational state. The instances in which it has occured in the last few years are summarized in the following table. Except for recently, it looks like it's occuring roughly once a month during observing.
Now associated with FRS ticket 13095.