Jenne allowed us to quickly drop from observing to change the EY camera offsets. Yesterday we updated them 87473 but didn't load the camera servo guardian, so the guardian did not use the correct lscparams file. This meant that the A2L gains (ISC_LOCK controlled) were set for the new spot, but the camera offsets (camera servo guardian controlled) were at the old spot. This was also missed because these values are not monitored in the observe SDF files. We noticed that:
- the buildups were even lower than normal, because the camera offsets were wrong
- therefore kappa c was at 0.96
- the sensitivity was also bad because the A2L and camera offsets were mismatched, causing extra ASC coupling
- the calibration monitoring lines showed 3% uncertainty at 33 Hz, this is usually 2%
Many of these are issues are documented in Ryan's shift alog here: 87485.
We dropped out of observing and I set the EY camera offsets to their proper value. This immediately began increasing the PRG and arm power. Then, I loaded the camera servo guardian so that when we relock these values are set properly. Then, I proceeded to monitor all the camera offsets and A2L gains and accept their new values in OBSERVE. This will cause SDF differences if these values change. However, I think these are important enough settings that we should be monitoring them for observing.
Kappa C has increased and the calibration monitoring lines are now back to 2% or less.
