cheryl.vorvick@LIGO.ORG - posted 10:41, Monday 20 June 2016 - last comment - 10:03, Friday 01 July 2016(27852)
IMC WFS centering on IOT2L - one more thing to note - pitch and yaw signals are swaped
While we were centering WFSA and WFSB we discovered that adjusting the beam in pitch shows up as yaw on the WFS medm, and adjusting the beam in yaw shows up as pitch on the medm.
It's unclear how long this has been the situation.
Keita cleared this up in his alog 27807. The choice of pitch and yaw on the table for WFS matches ptich and yaw in the chamber, so on the table the pitch (yaw) adjustment on the steering mirror to the WFS corresponds to the yaw (pitch) DOF in chamber.