Because we don't have an interferometer, I've spent most of the last day trying to get a measurement that Anamaria suggested, a transfer function from the ITMX St2 ISI actuators to all the sensors associated with the optic. I'm stil trying to figure out the best way to do this, but I'm archiving my DTT templates in DCC T1500298. This measurement is intended to be a jumping off point, not commissioning data or used for controls design, so I thought the DCC would be the easiest place for people to find it. I'm only attaching pngs of only a few of the TF's because there are 51 channels and the xml's are 89mb a piece. I only have X,RY and RZ, I'll get the other dofs when I feel like I know better what I should be doing.

The measurements are all roughly the same, driving in the cartesian (IFO X,Y,Z etc) St2 actuators and looking at all of the ISI's sensors, the ITM's osems and the op lev. The ISI and Quad are in their nominal states (isolated/damped), I've change nothing in the controls scheme. For now I'm using a simple band-passed white noise, but I fully expect to have to do something like a swept sine because all of the sus sensors are just noise above a couple hz.