Today's OPLEV charge measurement did not go through successfully since the ISI tripped at both the ends (roughly after taking 45 mins of data). I am not sure about who was working at the end station, although there were a few stuff going on. I will look for another window today since the detector will down for 8 hours of maintenance.
This seems to have been caused by balun replacement for CPS at the end stations this morning.
https://services.ligo-la.caltech.edu/LHO/workpermits/view.php?permit_id=8255