The alignment settings of the IFO this morning are a bit different than they were according to the hourly burt snap files from ~midnight on Monday night when locking was ~good. The slider values from Monday's good locking are consistent with the alignment values in hourly snaps from a few days before Monday as well. Attached is the snap file from Monday at 11:10pm in the event the commissioners need to do a complete restore. Commissioners report that it is confusing as to why to ASC systems did not recover the pointing even when the starting point was not quite right. Evan is working on it now.
Most notably:
IM4 is 1400 uRad different in Pitch
IM4 is 200uRad different in Yaw
MC3 is 100 uRad different in Pitch
MC1 is 80 uRad different in Pitch
PRM is 30 uRad different in Pitch
PRM is 40 uRad different in Yaw
Turns out the IMC slider values changed significantly, resulting in the IMC to hang at a different place. This caused a lot of the trouble we faced the last day. Once we simply restored Monday’s alignment slider values, the IMC mirror positions moved pretty much back to where they were. This meant we also reverted the alignment references back to Monday's values. This includes the following settings: H1:ALS-X_CAM_ITM_PIT_OFS 256 H1:ALS-X_CAM_ITM_YAW_OFS 340.9 H1:ALS-Y_CAM_ITM_PIT_OFS 303.9 H1:ALS-Y_CAM_ITM_YAW_OFS 433.5 H1:ASC-X_TR_A_PIT_OFFSET 0 H1:ASC-X_TR_A_YAW_OFFSET -0.095 H1:ASC-X_TR_B_PIT_OFFSET -0.11 H1:ASC-X_TR_B_YAW_OFFSET -0.067 H1:ASC-Y_TR_A_PIT_OFFSET -0.128 H1:ASC-Y_TR_A_YAW_OFFSET -0.174 H1:ASC-Y_TR_B_PIT_OFFSET -0.516 H1:ASC-Y_TR_B_YAW_OFFSET -0.1 H1:ASC-POP_A_PIT_OFFSET 0.38 H1:ASC-POP_A_YAW_OFFSET 0.248 H1:ALS-X_QPD_A_PIT_OFFSET 0.2 H1:ALS-X_QPD_A_YAW_OFFSET 0 H1:ALS-X_QPD_B_PIT_OFFSET 0 H1:ALS-X_QPD_B_YAW_OFFSET -0.05 H1:ALS-Y_QPD_A_PIT_OFFSET 0.1 H1:ALS-Y_QPD_A_YAW_OFFSET -0.4 H1:ALS-Y_QPD_B_PIT_OFFSET 0 H1:ALS-Y_QPD_B_YAW_OFFSET 0.15