This morning Travis, Jason and I made the ~last pitch alignment of the ETMx. We also pulled the FC from the inside of the 2 East viewports and the ETMx CP-AR. However, when we pulled the FC off of the CP-AR, the thin central portion of the sheet left segments of a ring around the center of the optic. Par for the course. And, of course, I could not get any good pictures of the feature so I'll attach a sketch shortly. I'll get with COC to see what I should do - note, I cannot get the spray cone on to resheet the First COntact and start over, so either we'll need to live with these remnants, or I'll have to get crafty with a smaller cone.
But, back to the alignment - we aligned the ETMx to an offset pitch pointing such that when we pull the First Contact sheet from the HR surface, the optic bounces up to point the nominal pitch. However, this does not help TMS with their alignment now. After consult with IAS/TMS we decided to put the offset pitch onto the bias slider of the ETMx. We have the range according to the uRad-calibrated bias slider, however Jason is going to go map it out and confirm the calibration of the slider with his optical equipment (still set up). This should not take long, and he will leave the offset bias enabled for TMS to start their alignment asap.
Attached is my sketch of the CP-AR FC remnants/wisps left after I pulled the full sheet today.
Note, these features are very small and kinda difficult to see, so they might be survivable...
ETMx pitch after this morning's adjustments:
Great! Sorry about the error in the reference to a CP - indeed, it is of course an ERM! Thanks!
Also to note - at the time of this alignment, I closed the Ring Heater around the ETMx.