J. Kissel, M. Pirello, B. Weaver

Betsy let us know that she's ready to start disconnecting cables of the ISIBS (the ISI supporting the Beam Splitter) in BSC2. As such, we used D0901301 to guide us, we turned off all three corners of the BSC ISI and T240 Interface Chassis in SEI-C5 U40-38 and U21-19 in the CER. The BSC ISI Interface Chassis are for the on-board capacitive position sensors (both stage 1 and stage 2 CPS), "high" frequency inertial sensors (stage 1 L4Cs and stage 2 GS13s), and the T240 Interface Chassis are for the on-board "low" frequency inertial sensors (stage 1 T240s).

All sensors are OFF as of 1:52p PT (2026-04-23 20:52 UTC).