After almost 12 hours of not locking, the ifo is back at 70Mpc. OMC locked at the right mode this time so I still have no idea what's wrong earlier. Terramon has just reported another 5.5M earthquake in Chile. We might lose lock again...
SDF is reporting 6 differences in ISI ITMX and ISI ITMY. Unable to go to Observe mode. I'm digging through the alog.
I couldn't find anything about the change in ITM ISI. FM4 simply adds gain of 20dB everywhere with 0 phase. FM5 labeled DWH reduces gain at high frequency with some phase change (maximum phase change of -40dB at ~20 Hz). I'm just gonna go ahead and accept the changes since the interferometer seems happy (so far). Now Observing.
The ifo hardly noticed the 5.5M earthquake. The violin fundamentals seem higher than normal but none seems to be ringing up. LLO recently joined us in locking. We are BACK in the game!
