11:05 - 11:45 Dark Offset investigation (because of previous dolphin recoveries Dec1, Jan17) 

• Zeroed by hand:  H1:LSC-TR_X_QPD_B_SUM_OFFSET (from alog 46124), because I remembered doing this for one of the recoveries before.
• Ran dark offset script:  dark_offsets_exe.py (at  /opt/rtcds/userapps/release/lsc/h1/scripts/dark_offsets/)
  • While sort of following steps in Dark Offset wiki.
• Adjusted H1:LSC-TR_X_QPD_B_SUM_OFFSET dark offset again by hand since it looks like it was changed during dark_offsets_exe.py script  (from -1.1 to +0.1 [hindsight:  maybe this was changed during DOWN script?])
  • Adjusted Yarm dark offset since I was at it.
  • But I did both of these with IMC locked and ITMs aligned (i.e. not dark).....wonder if I need to back these out?  ---->I don't think so, because I unlocked IMC & misaligned ITMs and dark offsets looked fine.
• Moved back to locking with no luck....and then an alignment (alog forthcoming).