aaron.viets@LIGO.ORG - posted 06:48, Tuesday 20 December 2016 - last comment - 14:45, Wednesday 04 January 2017(32752)
DCS filters file for offline calibration
Evan G., Aaron V. I have checked a new filters file into the calibration SVN for offline (C01) calibration. The filters were made using revision #3987 using the script /ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O2/H1/Scripts/TDfilters/H1_run_td_filters_1165799036.m The file can be found here: /ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O2/GDSFilters/H1DCS_1165799036.npz In order to achieve agreement with GDS calibration, it was necessary to add a delay of 2 16kHz clock cycles to the actuation filters. Evan G. is reviewing the DARM model codes to determine where this timing discrepancy originated. The attached plots include: 1) h(t) spectrum from CALCS and DCS 2) ASD ratio (DCS / CALCS) 3 - 5) plots of filters and errors
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These filters have been removed from the SVN. They were replaced by those discussed in https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=32965 For information on why this was necessary see https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=32907