Summary: After we changed the geophone H2 (klog 21084), I double-checked its parameters values given in the datasheet by measuring the IP transfer function in yaw, including the raw input. I'll post the result of the analysis in another klog.

The new geophone is #37, with parameters

• f0 = 1.03Hz,
• Eta = 0.291, where Eta = 1 / ( 2Q ) with Q = 1.72,
• Ge = 288.31 V/m/s

Then, in the filter bank for geophone H2, using the new parameters, I replaced the old filters with new ones

• InvGeoGain = m2um * ( 1 / Ge ) * ( 1 / preamp )
• InvGeo+Hp =  ( 1 / H_geo ) * hp

where

• m2um: conversion from metres to micrometres.
• H_geo( Ge, f0 , eta ) = Ge * s**2 / (omega0**2 + 2 * omega0 * eta * s + s**2 )
• s = 1j *2 * pi * f
• preamp = 940, this factor compensates the preamplifier gain.
• hp: high-pass filter with four poles located at 3 mHz.

The file is in /kagra/Dropbox/Subsystems/VIS/vis_commissioning/sr2/inter_calibration/