Following what was done in Type-A for LVDT sensor correction using the seismometer (klog 21957), for SR2 I copied and (slightly) modified Terrence's filter for SRM.

The appropriate procedure for designing this filter is explained in Terrence's thesis in Sec. 8.3.3. Such a procedure takes into account the noise of the sensors, which is expected to be different for different suspensions. Terrence's filters were optimized for SRM, but we are using them in other suspensions as approximations.

Details of the modifications referred to above will follow in a future entry.