Sheila, Nutsinee

A follow up from alog76294 we want to properly compare OMC REFL when we inject squeezing and without squeezing. The noise goes up by 1.1e-5 mW (I believe this is what the channel is calibrated to) udinrg NO SQZ time compared to SQZ time.

Now including the trace from O4a and more no SQZ traces after a better OMC alignment.

After looking at more traces from SQZ and NO SQZ time it seems OMC REFL can drift up and down on its own. I don't think injecting squeezing is doing anything to OMC REFL.

The no sqz time used was 13/03/2024 15:29:00 UTC (no sqz time ends 15:51:00 UTC)

sqz time (1) used was 13/03/2024 16:00:00 UTC

sqz time (2) used was 13/03/2024 09:00:00 UTC

Post OMC alignment

no sqz time (1)  13/03/2024 21:25:59 UTC

no sqz time (2)  13/03/2024 21:36:27 UTC

O4a time 23/10/2023 15:00:00 UTC (~164Mpc)

Also attached a psd of OMC trans and a coherence between CLF and OMC RF3.