Following the analysis done in SR3 of the asymmetric values of IP-L and IP-T resonance frequencies (klog 17281), I carried out the same analysis in SR2 in which there is no asymmetry or it's jut too hard to distingush.

I measured the transfer functions at the individual LVDT-actuator units H1, H2 and H3 separately. As can be seen in the plots attached, the lowest resonance frequencies in each case are:

• H1: between 66 and 70 mHz,
• H2: 66 mHz,
• H3: between 66 and 70 mHz.
• Frequency resolution: 5 mHz.
• Temperature: 23.6°C (O3GK T = 23.5 °C).

The resonance frequencies are either the same or very close together when measuring with the current frequency resolution.