Upon arrival I found ITF in Science Mode.
ITF stable locked at LN3_SQZ (Science Mode) till 11:31 UTC when it unlocked due to the bad weather conditions. High wind activity.
According with Gouaty I set ITF in SINGLE_BOUNCE_NI in order to allow Romain on his investigation on OMC shutter and B1_PD3 noise.
TROUBLESHOOTING MODE set from 11:33 to 12:56 UTC. Activity concluded. Relock in progress...
NO DMS events Monitor to report
The unlock due to bad weather was not associated to the limited range of the actuators, as happened other times. When the wind increased and reached 50 km/h in a few minutes, WE_MIR_CORR increased, but not enough to stay so close to the saturation (fig 1). The unlock happened during a clear drop of the sidebands, at the end of which some longitudinal loop was not very stable anymore (fig 2). The drop was associated to a misalignment of BS TY (fig 3) and PR_TY (fig 4). It is not clear to me which was the first which began to move, and what was the cause of this motion.
