Betsy, Arnaud, Jeff, Oli

Physical movements made in L, T, and V match up with movement read out in EUL basis channels and OSEM basis channels.

Last wednesday (06/24/2026), after we did some checks at the QOSEM sat amp (90758), Betsy and Arnaud went into BSC2 to make some physical movements on the BS so we could check that our channels were displaying movement in the correct directions.

Three physical movements were made:

• -L direction (checking direction of L, F2, and F3)
• +T direction (checking direction of T and SD)
• -V direction (checking direction of V, LF, and RT)

L
- Pushing in -L direction
- OSEM2EUL matrix says that F2 and F3 are in same direction as L movement (+)
- Push happened at 2026/06/24 22:42:37 UTC and lasted about 30 seconds

T
- Pushing in +T direction
- OSEM2EUL matrix says SD is in the opposite direction as T movement (-)
- Push happened at 2026/06/24 22:40:31 UTC and lasted about 18 seconds

V
- Pushing in -V direction
- OSEM2EUL matrix says LF and RT are in the opposite direction as V movement (-)
- Push happened at 2026/06/24 22:34:10 UTC and lasted about 2.5 minutes
- This was done by pushing down the top vertical earthquake stop on M2