shift of 23rd Feb 2019. 
Stray light investigation on ESQB. S Chua, L Conti

07:45UTC (about): installed 2 accelerometers on ESQ

1234943232UTC reference
1234943518 gentle shaking of table, parallel to long side
1234943868 (07:57:30) gentle shaking of table, parallel to short side
1234943945 (07:58:47) gentle shaking of table, parallel to short side

From now on we refer to:
X direction: parallel to short side of ESQB
Z direction: parallel to long side of ESQB

tests with Mini Acc on different places. Each shaking (either tapping or with impulse hammer) lasts about 30 sec

MiniAcc on CamFar, MiniAcc axis parallel to X direction:
1234946660 reference
1234946804 shake X direction
1234947081 hammer, vertical
1234947381 hammer, X direction
1234947666 hammer, Z direction

MiniAcc on CamNear, MiniAcc axis parallel to Z direction:
1234948001 hammer, Z direction
1234948178 hammer, vertical
1234948313 hammer, X direction
1234948445 tapping along z direction of CamNear base

MiniAcc on Faraday Isolator3 - Polarizer mount, MiniAcc axis parallel to X direction 
1234949152 hammer, vertical
1234949295 hammer, X direction
1234949398 hammer, Z direction
1234949510 hammer, X direction
1234949627 tapping X direction
1234949823 tapping X direction

MiniAcc on Farady Isolator 3 - Magnet mount, MiniAcc axis parallel to vertical direction
1234950355 hammer, vertical
1234950467 hammer, X direction
1234950570 hammer, Z direction

MiniAcc on Faraday Isolator3 - Polarizer mount base, MiniAcc axis parallel to X direction 
1234951263 hammer, X direction

MiniAcc on Steering mirror mount back - MiniAcc axis horizontal, at about 45degree wrt XY (perpendicular to mirror surface)
1234951595 hammer, vertical
1234951765 hammer, X direction
1234951928 hammer, Z direction

MiniAcc on CamFar, MiniAcc axis parallel to X direction:
1234952854 hammer, X direction

at about 10:55UTC change config file: remove ENV_SQZ_MINI_ACC channel and restore ENV_SQZ_PIPE_ACC_Y
1234955132 tapping pipe flange parallel to X direction

11:10:08 change orientation of pipe flange accelerometer so that axis is parallel to pipe itself, horizontal.
1234955609 reference
1234955694 tapping pipe flange parallel to X direction

then we move the accel on the pipe flange back to its original vertical position