Tony handed off the IFO to me at the end of his shift and after the CDS team had recovered following a timing error and Dolphin glitch; see alog78892 for details on that. Generally alignment was very bad, not unsurprising since mutliple seismic platforms tripped as a result of the glitch.
Executive summary: H1 is back to observing as of 12:35 UTC after a lengthy alignment recovery process. See below for my general outline of notes I kept through the process.
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Post Timing Glitch Recovery - 6 July 2024 (Owl)
IMC won't lock; alignment on camera looks bad
Restored optic sliders to after last IA (GPS 1404280186)
Seeing that several optics not actually in right place according to OSEMs (not unexpected with SEI trips) and no light on ALS cams
Trending PRC optics...
PR3 move-
P: -117.1 -> -122.2
Y: 152.4 -> 99.8
PR2 needed slight adjustment also
Got light back on ALS cams
Moved ETMs to get green alignment back
Completed green arms part of IA
XARM IR locking on wrong mode during INPUT_ALIGN
Adjusted PR2 to improve IR flashes; still not a great AS AIR cam image (haven't brought SRC back at this point yet)
Completed INPUT_ALIGN part of IA
Completed PRC_ALIGN part of IA, no intervention
AS AIR cam looks bad at start of MICH_BRIGHT_ALIGN
Trending SRC optics...
SR3 move-
P: 437.9 -> 438.8
Y: -148.9 -> 122.3
Moved SR2 by large amount in P & Y also
MICH won't lock, restoring BS alignment
ASC-AS_A_DC_NSUM gets very noisy whenever trying to ACQUIRE_MICH_BRIGHT; spot on AS AIR cam flashes rapidly
Skipping MICH for now, onto SR2 align
Completed SR2_ALIGN part of IA, no intervention
Tried MICH again, no improvement, onto SRC_ALIGN
Seeing same issue with ASC-AS_A_DC_NSUM signal getting very noisy and camera spot flashing when trying to ACQUIRE_SRY
SRCL_TRIG conditions are being met; can occasionally get to SRY_LOCKED for a second or two
Since alignment actually doesn't look too bad, going to try and lock mostly out of curiosity
Lock aquisition went very well; DRMI on first try, no locklosses going up
Reached NLN @ 12:33 UTC, observing @ 12:35 UTC