J. Kissel I've gathered the regular sensing function measurements this week. The file names are listed below. /ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O3/H1/Measurements/FullIFOSensingTFs 2019-07-03_H1_DARM_OLGTF_LF_SS_5to1100Hz_15min.xml 2019-07-03_H1_PCALY2DARMTF_LF_SS_5t1100Hz_10min.xml 2019-07-03_H1_PCALX2DARMTF_LF_SS_5t1100Hz_10min.xml 2019-07-03_H1_PCALY2DARMTF_BB.xml 2019-07-03_H1_PCALX2DARMTF_BB.xml 2019-07-03_H1_OMCDCPDSUM_to_DARMIN1.xml Since I'm now well-practiced in processing the "normal" measurements with PCALY, I've already got the answers from it: Optical gain, H_c (ct/m) | 3.156e+06 (+1300,-1294) or (+0.04121%,-0.04101%) Optical gain, H_c (mA/pm) | 4.213 (+0.001736,-0.001728) or (+0.04121%,-0.04101%) Cavity pole, f_cc (Hz) | 406.9 (+0.7171,-0.7105) or (+0.1762%,-0.1746%) Detuned SRC spring frequency, f_s (Hz) | 5.193 (+0.00917,-0.009293) or (+0.1766%,-0.179%) Detuned SRC spring quality factor, Q_s | 99.09 (+6642,-1.452e+04) or (+1.492%,-0.6826%) Residual time delay, tau_c (usec) | 0.6708 (+0.4446,-0.4449) or (+66.28%,-66.33%) which means the MCMC computed TDCFs are TDCF Parameter | Value --------------------------- kappa_c = 0.97099 f_cc = 406.9 f_s = 5.193j #spring Q = 99.09. which are in as much of agreement as one can see from the 2019-07-03 (I'm still working on getting data these GDS-computed TDCFs quick so I can make a plot for you in which you can actually quantitatively compare).