SUMMARY: Arrived to an H1 locked and in Commissioning, and L1 down for last 12+hrs. There was some commissioning work and then H1 was taken to Observing Mode at 65Mpc. Environemental conditions were nominal with wind dipping below 20mph & all seismic bands also quiet.
Commissioning Activity
Had a discussion about WP5442 with commissioners and since L1 was down and there was a measurement which needed to be done before O1, gave them a few hours to run a PLL measurement (they had it from roughly 7-10UTC).
H1 Back To Observing
Once they were done and H1 was back up to Low Noise, a roll mode was noticed aroudn ~41Hz (Dan/Evan mentioned it's a triple). It rung down after about 10min, but it was huge at the onset.
While checking items before going to Observing Mode, noticed a CFC bit for H1OMC on the CDS Overview. This was due to Evan & a diagnostic for LSC CARM (which we don't use). I hit Load Coefficients to clear this bit.
At this point we were hovering at about 55Mpc. Since we had low violin modes, transitioned from READY_FOR_HANDOFF to ADD_WHITENING on the OMC_LOCK guardian (and then went right back to READY_FOR_HANDOFF). This took the range up to 65Mpc.
The range then went to a cool 65Mpc and the DARM spectrum looked very nice (compared to the previous night)--spectrum was very close/better than the reference.
SDF Overview had some DIFFERENCES, but Evan/Dan cleared most of them. The only differences left were for:
OMC (5 diffs)
CALCS (29 diffs)
According to Mark Barton's Mathematica model, 40.4 Hz is the HSTS roll mode.