[lucia, terrence]

same as 14788. In addition, I diagonalized the geophones as well. The final transfer function measurements are saved in /kagra/Dropbox/Subsystems/TypeBData/SR2/TF/measurements/20200720/*c.xml. There're some 2-3% residual couplings I couldn't get rid of. I suspect that the calibration filter of the geophones does not whiten the geophone signal properly to displacement.

I will proceed to do blending for SR2.