This morning, IAS reverified that we needed to yaw the ITMy tower a few mRAD.  We clamped both chains and took a baseline reading of the ITMy pointing in the clamped state.  We then loosened the dog clamps holding the structure to the ISI table and took another reading.  The dog clamps were still somewhat tight on the tower, no gap between the structure and table was noticeable.  Jason will post the numbers in a subsequent entry.  Using the new Pushers/Movers we were able to push opposite corners of the structure to reduce the yaw to ~20uRAD. We then tighted some of the dog clamps and observed that the yaw had walked out to ~400uRAD. We paused there and took the Y-axis reading. Unfortunately the structure appears to be out of position on the table in this direction by ~6mm.  The initial placement of the structure nor the error in how the mass is suspended inside the structure account for this large misplacement. Dennis and Doug used the microscribe to measure the distance between the corner cube and the ITMy and also started looking into the optomechanical model in hopes to pinpoint where this 6mm error comes from.

Meanwhile, they were going to continue with the foray of IAS measurements on the FMy.  Fleshing out the next few days of interwoven IAS, Testing, and cartridge prep activities, but things look tight. We could not figure out a more efficient plan than the following:
1) determine how far ITMy and FMy structures need to be pushed around on ISI table (this afternoon-tomorrow morning)
2) push structures in x,y as needed, adjusting yaw as needed (tomorrow)
3) attach sleeve, vibrationabsorber payloads, continue fine IAS alignment to finalise yaw and pitch (Sunday)
4) SEI rebalance table payload, but leave locked until COB (Monday morning)
5) IAS measure ITMy to CP gap, SUS to adjust if needed Monday afternoon)
6) unlock ISI for TESTING (Monday night)
7) TEST (Monday night? - few days)
8) during testing gaps, prep suses for cartridge install (Monday-Wed)