Fig.1. showed the spectrum and coherence between PDA3 RF45 I
(Blue) 2025/06/28 00:21:00 6.2 Mpc
(Red) 2025/06/28 01:55:00 7.0 Mpc
As you can see, some unknown 140 Hz peak disappeared, and several coherence was detected in CARM out-of-loop PD.
So, If noise subtraction to this data was performed, we expect to subtract a lot.
