I have checked that the input and output matrices for the REFL DC WFS centering is correct. First, I confirmed the input matrix for the DC centering by moving the RM offsets by hand in pitch and yaw and centering the beam on REFL A and B WFS. RM1 centers the beam on REFL B and RM2 centers on REFL A. This corresponds to the switch that was made in vacuum by Keita. This change is SDFed.

Next, I moved the RMs in a set offset and measured the change in the DC1 and 2 pitch and yaw inmons (scope attached). By hand I calculated the output matrix.

I calculated

pitch: [2, 1.75 ; 10.6, -32.9]

yaw: [-2, -1.5 ; 11, -28.7]

The current output matrices are

pitch: [2, 1.585 ; 9.22, -32.21]

yaw: [-2, -1.59 ; 11.03, -28.27]

which is close enough that I don't think they need to be updated.

When we engage DC1 and 2 centering, the beams converge to center as expected. However, the loop is very slow, so we may need to confirm the UGF.