I have made the spot position calculation script compatible with the new data directory structure that Craig implemented recently, which helps keeps the data more organized.

There were 5 A2L measurements taken on Saturday (alog 43787), which I show in the attachment that is zoomed in.  The other attachment is the same data, but including all test mass spot position measurements since the beginning of O1.  We have never been this far out in ITM yaw before.  We are about 2cm from the center on the ITMs.  The SOFT degrees of freedom mostly move the spots on the ETMs, which seem like they're reasonably close to the center. I'm not 100% sure why the 5 measurements aren't all consistent with each other, but Sheila and Georgia reported that the script wasn't working as well as they had hoped.  We'll check on this next time we're locked.

A note, ITMX's coils weren't balanced at the time of this measurement, so it's values should be taken with a bit of a grain of salt, but this still seems consistent with Gabriele's conjecture that we are quite far off in yaw, giving us some coupling that could be causing problems for the HARD yaw loops.

If we can get the IFO locked tonight (it's being very fussy today), we'll walk the PR3 spot, which also moves the spot on the ITMs.  Hopefully this won't require too much moving of the ETM spots, but we can do that as well to keep the arm buildups high.