TJ Massinger, Josh Smith

We followed up alog 42816, which detailed switching off alignment control to the M2/M3 stages of MC2 (FRS ticket 11040). 

Looking at a 3 hour window surrounding when the alignment control was switched off, we picked two times before and after the switch in which the IMC state seemed consistent. We plotted ASDs of IMC-F, IMC-L, and IMC-WFS_{A/B}_I_{PIT/YAW} before and after the switch to look for evidence that IMC performance was affected by switching off alignment control to the M2 and M3 stages of MC2.

Attachment 1 shows the IMC input power, MC2 TRANS, and IM4 TRANS trended over 3 hours, showing consistent power levels. 
Attachments 2 and 3 show the alignment switches being disengaged and the pitch and yaw inputs to the relevant drivealign matrix going to zero. 
Attachments 4 and 5 show ASDs of IMC-F and IMC-L before (17:00 UTC, 17:30 UTC) and after (19:00 UTC, 19:30 UTC) switching off alignment control.
Attachments 6, 7, 8, and 9 show ASDs of WFS PIT/YAW readouts before and after switching off alignment control.

There don't seem to be any systematic changes to the above ASDs or IMC power levels that indicate performance changed after switching off alignment control to the M2 and M3 stages of MC2.