The PSL ISS out-of-loop photodiode PSL-ISS_PDA is extremely glitchy. This channel was used during ER3 as the fake h(t) channel and was clean except for unexplained glitches below 55 Hz. When checking to see if the low-frequency glitches had changed, I found that this channel is now extremely glitchy at all frequencies, and the spectrum is much higher than previously. I used a 9-hour long lock from May 16 5:23 UTC to 14:37 UTC, where the ODC showed that the PSL should be working correctly.

The first two plots below are Omicron searches from ER3 and from this new time. The channel is constantly glitchy. The second two plots are the spectra from the in-loop and out-of-loop photodiode first from ER3 and then this new time. The colors were switched by the plotting program, but it's obvious which one is in-loop.