Dataset:20200224_15
We took the swept sine data.
The estimated parameters are the followings:
Hx=( 4.588746499021084 pm 0.028530404551884117 )x1e-12
Hy=( 3.913111491095241 pm 0.024491168603893228 )x1e-12
tau_ax=( 10.830079321303918 pm 1.9550732102901434 )x1e-6
tau_ay=( 10.637636932094138 pm 1.9976075919301168 )x1e-6
Hc=( 0.07407934891056883 pm 0.0014625953482160351 )x1e8
fcc=( 20.941997337688232 pm 0.43496986889952755 )
tau_c=( -35.73890330083918 pm 3.5246235500324334 )x1e-6
We set these parameters to the low latency and restarted it on 17:22 JST. The filter file name is 2020-04-21_v2_FIRfilters.npz.
After updating the parameters of online, the low latency could output the correctly calibrated h(t).
A rough consistency check of the actuation strengths with the FSM + MICH measurements, using a method developed by W. Ogaki (a previoius such measurement can be found in klog 11754).
Below we provide our preliminary results.
From FSM,
- the MICH optical gain was estimated to be 1.826e+11 ct/m
Then, with MICH locked, the following quantities were aquired:
- A_BSTM gain: 5.457e-12 m/ct
- ratio of A_IXTM / A_BSTM gains: 0.09186
- ratio of A_IYTM / A_BSTM gains: 0.1037
- ratio of A_EXTM / A_IXTM gains: 0.8623
- ratio of A_EYTM / A_IYTM gains: 0.5912
From this we can estimate A_ETMX and A_ETMY actuator strengths:
- at 1 Hz, A_EXTM = 4.322e-12 m/ct
- at 1 Hz, A_EYTM = 3.346e-12 m/ct
The MICH result for A_EXTM is within 17% of the DARM result. And for A_EYTM, within 6%.
We have not analyzed the uncertainties associated with MICH results yet.
Each of the estimated values are weighted averages taken from TF measurements (weights were set using coherences associated with the measurements).
09:20 - 12:40 Alignment and Finesse measurement [klog14258]
12:40 - 13:10 Take reference spectrum.
13:10 - 15:00 Calibration parameter measurement by Pcal (DARM OLTF, Pcal to DARM, ETMX to DARM, ETMY to DARM) [klog14260]
15:00 - 19:30 Calibration parameter measurement by Free-swinging Michelson (MICH fringe data: GPS:1271489507-180, 1271492048-300) [klog14265]
20:07 - 20:08 Parameter update [klog14262, klog14270]
20:20 - 22:50 Duotone sine injection
22:55 - 25:20 Tracking test of calibration lines.
25:30 - 26:40 Calibration parameter measurement by Pcal for checking reproducibility.
26:40 - 27:10 Sleep a bit during lockloss due to the Earthquake [klog14266]
27:10 - 28:20 Alignment and Finesse measurement [klog14267]