I retuned the ITMY P2L and Y2L gains, by injecting a DHARD line at 22 Hz in pitch and yaw. This was motivated by the higher coherence between DARM and DHARD_Y

By changing H1:SUS-ITMY_L2_DRIVEALIGN_Y2L_SPOT_GAIN from -0.15 to -1.55 I could reduce the DHARD_Y coupling by 32 db.

To see the 22 Hz line from DHARD_P I had to increase its amplitude by a factor 10 with respect to Y. The coupling was highly non-stationary, so I could not improve much. I changed the gain from -0.10 to -0.15

Coherence between DARM and DHARD_Y is gone