5:47UTC (10:47pmPDT):  Finally back to OBSERVING!!!

Most of tonight's shift H1 has been down (first two hours was due to today's Long Maintenance Day & after that it has been trying to lock while battling a shaking earth!).

Attempt #1:

Once we were given the keys to H1, worked on getting H1 back to OBSERVING.  From 0:30-2:10utc there was an a quick alignment and then running through locking.  Unfortunately, as we were going through SDF Diffs, received notification of an incoming EQ from Russia (Verbal said it was from Japan).  Either way, the S&P waves were big and fast and they took us down after being at NLN for only a few dozen minutes (no observing!!).  Attempted to transition to EARTHQUAKE, eventhough EQ Plot recommended LARGE_EQ_NOBRSXY (which would prob break lock!).

2:30 - 4:00UTC Waited out the EQ.  Did not attempt locking!

Attempt #2:

• 4:00 - 5:00 Tried locking, but still couldn't get past CHECK IR (EQ band was above 0.1um/s).
• 5:00: finally make it past CHECK IR!  And proceeded through ISC_LOCK.
• 5:27 Another EQ!!!!  6.4 from Costa Rica which recommended LARGE_EQ_NOBRSXY again!  UGH!!!!   Since I was in the latter steps of ISC_LOCK, and wanted to try and stay locked, I opted to, once again, only go for EARTHQUAKE, because I did NOT want to break lock!!!! As I watched all earthquake signals AND ISC_LOCK progress, I crossed my fingers.  [see 2nd attachment for screenshot of everything I was looking at for this EQ!]
• 5:47 made it to Observing!!  (even with the Earth A'shakin'!)
• And here we stand.  I am still in the EARTHQUAKE state (which appears to have saved the day/night!)

SDF Diffs:  [see 1st attachement!]

• For attempt #1 I was only able to address a few diffs.  Called Hugh to take care of the HAM6 ISI CPS threshold which was counting down (this required a Reset on the WD screen...this was due to baluns work).
• Georgia ACCEPTED some ASC diffs, but these came again during Attempt #2.  Wondering if we should UNMONITOR them instead.
• Jason warned me of a teeny tiny decimal place diff for PSL ISS.  I ACCEPTED, but once again, it came up on my 2nd attempt.  Should we UNMONITOR?
• Then there were a handful of PLC related diffs...most (but not all) these diffs were related to Beckhoff stuff, specifically rotation stages (for PSL, TCS, etc.).  I ACCEPTED these.

Where We Stand:

We are still rung up from the Costa Rica EQ, so Ed is going to leave H1 in EARTHQUAKE state.  (our range doesn't seem to mind and has decent [& increasing] range).