ibrahim.abouelfettouh@LIGO.ORG - posted 23:24, Tuesday 14 April 2026 - last comment - 16:44, Wednesday 15 April 2026(89891)
ITMY ITMX and BS Oplev Trend since last DRMI
Attahed and in the table below are oplev positions for ITMY, ITMX and BS since last DRMI lock on 03/19/2026 at 11:02 PDT
| DRMI Locked Reference | Latest | |
| 11:02 PDT 03/19/26 | 15:00 PDT 04/14/26 | |
| BS P Oplev | 2.10 | 0 |
| BS Y Oplev | -25.92 | 0 |
| BS Sum Oplev | 20215.30 | 19605.8 |
| IX P Oplev | -10.70 | -3.64 |
| IX Y Oplev | 5.10 | -1.2 |
| IX Sum Oplev | 3188.52 | 4.7 |
| IY P Oplev | -26.65 | 42.5 |
| IY Y Oplev | -3.22 | 22.92 |
| IY Sum Oplev | 7904.27 | 4731.59 |
Note 1: The BS Oplev Damping loops were still on during some FARO work and were shaking the BS. We turned these off on morning of April 14.
Note 2: The right-most T-cursor marks the corner-station vent
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Comments related to this report
Note that gate valve closure means that IX oplevs would read a 0 sum. This is expected.
Also, since this alog, Jeff/Ibrahim flipped the BS OPLEV Damping Servo OFF via the damping filter bank buttons, and re-turned-on the output buttons of the main banks, so those Pit/Yaw channel values bounced back up from 0 to more reasonable values.