Following up on last night's work 42590, more PRMI alignment. At the beginning I realigned MICH at dark fringe, and then PRX. Power were initially at similar levels as yesterday (POPAIR_B_RF18 ~ 20, POPAIR_B_RF90 ~ 27)

Most of this morning's improvement was due to moving PR3 and PR2 together, both in pitch and yaw. Powers improved by a further 15-25% with respect to yesterday's night: POPAIR_B_RF18 ~ 23, POPAIR_B_RF90 ~ 34)

I also moved the input beam by acting in IM3 and IM4. I saw some effect, but not very large.

Attached plots with trends and offsets.