I started to prepare the ASC for initial alignment.
During the XARM alignment with GRX, I plan to use GRX trans QPDA1 for PR3 angular control.
During the YARM alignment with IRY, I plan to use IRY trans QPDA1 for BS angular control.

I set these QPD signals to ASC input matrix for DOF1 (GRX QPD1) and DOF2 (IRY QPD1).
Also, I set output matrix from DOF1 to PR3 and DOF2 to BS.

Then, I measured offset on IRY QPDA1 because they don't have a shield on the optical table and large offset due to ambient light existed.
However, IRY QPDA1 SUM due to GRY is about 3 times larger than taht due to IR.
So, we need to put green filter for IR path to reduce the effect of GRY.