aaron.viets@LIGO.ORG - posted 12:17, Wednesday 26 October 2016 - last comment - 08:30, Friday 28 October 2016(30888)
Calibration Factor Comparison between GDS pipeline and SLM tool
Below are plots comparing the kappas and cavity pole from LHO as computed in the GDS pipeline and the SLM tool. The data is from the end of a lock stretch, starting on October 24, 2016, at GPS time 1161341820, and lasting 4.5 hours. The agreement is very good for the most part, with the following exceptions:
1) kappa_c as computed by GDS is slightly larger than that computed by SLM.
2) The cavity pole as computed by GDS is smaller by about 2-3% (~10 Hz).
Below is a table of mean and standard deviation values for the data taken from GDS, SLM, and the ratio GDS / SLM:
SLM mean SLM std GDS mean GDS std ratio mean ratio std
Re(kappa_tst) 0.8920 0.0068 0.8915 0.0058 0.9995 0.0044
Im(kappa_tst) -0.0158 0.0039 -0.0145 0.0014 0.9725 1.0764
Re(kappa_pu) 0.8961 0.0080 0.8956 0.0059 0.9995 0.0067
Im(kappa_pu) -0.0050 0.0056 -0.0034 0.0022 0.1662 28.8601
kappa_c 1.1115 0.0094 1.1168 0.0087 1.0048 0.0078
f_c 354.2332 2.9296 345.0556 2.3106 0.9742 0.0104
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Below is an updated table of mean and standard deviation values for the data taken from GDS, SLM, and the ratio GDS / SLM with imaginary parts rescaled by adding 1.0 (~the magnitude of the kappas):
SLM mean SLM std GDS mean GDS std ratio mean ratio std
Re(kappa_tst) 0.8920 0.0068 0.8915 0.0058 0.9995 0.0044
Im(kappa_tst) -0.0158 0.0039 -0.0145 0.0014 1.0014 0.0042
Re(kappa_pu) 0.8961 0.0080 0.8956 0.0059 0.9995 0.0067
Im(kappa_pu) -0.0050 0.0056 -0.0034 0.0022 1.0017 0.0061
kappa_c 1.1115 0.0094 1.1168 0.0087 1.0048 0.0078
f_c 354.2332 2.9296 345.0556 2.3106 0.9742 0.0104
Here are covariance matrices and correlation coefficient matrices between SLM and GDS:
Covariance Correlation
Re(kappa_tst)
1.0e-04 *
0.4618 0.3208 1.0000 0.8163
0.3208 0.3345 0.8163 1.0000
Im(kappa_tst)
1.0e-04 *
0.1507 0.0012 1.0000 0.0211
0.0012 0.0210 0.0211 1.0000
Re(kappa_pu)
1.0e-04 *
0.6385 0.3128 1.0000 0.6636
0.3128 0.3480 0.6636 1.0000
Im(kappa_pu)
1.0e-04 *
0.3140 -0.0036 1.0000 -0.0293
-0.0036 0.0495 -0.0293 1.0000
kappa_c
1.0e-04 *
0.8895 0.4464 1.0000 0.5464
0.4464 0.7502 0.5464 1.0000
f_c
8.5828 -0.0252 1.0000 -0.0037
-0.0252 5.3387 -0.0037 1.0000
Updated plots are attached as well.
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