Summary: I noticed that the TF of  IP-Y with the new geophone, had a depression around 1 Hz, so I calculated corrections to the geophone parameters.

From the measurement of the IP yaw transfer function, it was possible to see that the H2 transfer function had a depression at around 1 Hz. Fig. 1 shows such a measurement and a model of how the graph should look like.

As I did before (klog 20808), I adjusted the parameters to try to correct this depression. The old and new values are

Old

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

New

• f0 = 1.004 Hz,
• Eta = 0.3134179,
• Ge = 272.752 V/m/s

Fig. 2 shows the calculated TF using the new parameters and the aim. Although it's not completely straight yet, it's better and acceptable,