As a follow on from alog 30790 where RM and OM vertical modes are of interest, this morning we measured them for LHO - they are in fact at 6.1Hz.  Attached are spectra of these modes for RM1, RM2, OM1, OM2, and OM3.  The spectra are with the HEPI not isolating, while the black ref trace on all polots is from earlier in the morning when the HEPI was isolating.  At a glance, we also note that while the OMs look relatively healthy, there is some fishyness on the RM spectra from the 6.1Hz v-mode up to ~20Hz seen on a few OSEMs.  OSEM open light voltages look ok, however.

Data can be found in

/ligo/svncommon/SusSVN/sus/trunk/HTTS/Common/Data/

2016-10-25_1924_H1SUSOM_PSD.png
2016_10_25_1924_H1SUSOM_PSD.xml
2016-10-25_1924_H1SUSRM_PSD.png
2016_10_25_1924_H1SUSRM_PSD.xml