After 88:46:58-long nominal low noise lock was lost, we quickly drove to the EX to check the beam position on curved optics on TMSX telescope as well as the ISCTEX. We didn't expect this to be really bad but if we want to pico or set new offset to green QPD we need to at least have some idea about the starting point.

TMSX primary mirror was photographed from inside ISCTEX through the viewport for IR transmission using a monopod with cell phone attachment (glorified selfie stick) to go close. Though not totally in focus, you can see that the beam spot is low and close to me.

The secondary mirror beam spot was pictured using an unused IR analog camera port. We have found that the location of the illuminator and the camera (T1000746 Viewport FDR page 41) are inverted, i.e. the camera port was lower, which allowed us to look at the secondary very clearly. No disaster here. BTW the illuminator was not usable (no power, probably the bad cable).

On ISCTEX, two 1" lenses looked good (ALS-L5 and L6 in D1800270 ISCTEX Optical Layout) and the 2" lens ALS-L7 was fairly off for my taste. We checked the PBS for combining Hartmann and ALS green but nothing suspicious.

We would have fixed at least the table but it was already 12:30-ish so we gave up. Will check EY next week.