Today I confirmed that all corner station optical levers are turned ON and that beams are on the QPD sensors.  We decided to NOT re-center these optical levers in order to preserve the centering from the last time the IFO was locked.  It should be noted that both the PR3 and SR3 optical levers required some tweaking to get the beam back onto the QPD.  To preserve the previous centering of these optical levers, I tweaked the alignment via the launching telescope in the transmitter; therefore the (0,0) for both SR3 and PR3 optical levers represents the last time these oplevs were centered during O2 (the receivers have not been moved).

I do want to call out one thing.  In investigating the SR3 optical lever (thanks Greg for climbing on top of HAM4 to direct my alignment!) we were having much difficulty in locating the beam; while it was on the QPD, there was no signal on the MEDM screen.  It was discovered that the cable from the SR3 oplev whitening chassis to the CER had been unplugged in the CER.  Looking through the alog, the best I can tell is this happened sometime between October 4 and October 12 (October 12 is the last time the oplev trends had a signal for SR3).  This is something that should have, at a bare minimum, been noted in the alog, yet I can find no reference to any work involving the SR3 oplev and the CER during that time period.  Thanks to Fil and Jeff K. for their help in tracking this down.