thomas.shaffer@LIGO.ORG - posted 15:24, Thursday 19 September 2024 - last comment - 18:24, Thursday 19 September 2024(80193)
Calibration line heights with clean channel at lock starts
The line heights of some of the PCAL lines in the cleaned channel have been much higher than actual at the begining of todays' locks (attachment 1). The relock yesterday didn't have it (attachment 2). Looks like this was potentially fixed a month ago - alog79558, but perhaps the locks from today are too short?
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This is most likely caused by a slightly different issue that what was addressed in LHO aLOG 79558. In some instances, the line subtraction TFs are not updating properly at the beginning of lock stretches. I am working on a fix for this.