Today I came back to the process of intercalibration of the seismometer on the ground (2nd floor) with the LVDT and the geophones. See entry 20873 for details.

I double-checked the intercalibation between the LVDTs and the geophones by measuring the IP-Y transfer function (see Fig. 1). The results seemed fine. Then I measured the seismometer output (in units of µm/rtHz) SEIS, and the substraction GEO - LVDT as described in entry 20873 (see Fig. 2).

I'll analyze the data and write comments in a future entry.

• Directory: /kagra/Dropbox/Subsystems/VIS/vis_commissioning/sr2/inter_calibration/
• File for the LVDT and geophone intercalibration assessment: IP_Y_EXC_displacement_cnt_new_geo.xml
• File for the intercalibration of the seismometer on ground with the LVDT and geophone:  IP_Y_EXC_intercalibration_with_seis.xml