1. Response functions
File name: observe.dat

The response functions (the impedance tensor, vertical magnetic transfer function, and interstation horizontal magnetic transfer function) used in the MT inversion are written in this file.
The file format follows that of the input files of FEMTIC code.
https://github.com/yoshiya-usui/femtic.git

2. Resultant electrical resistivity structure
File name: lon_lat_dep_rho.txt

Electrical resistivity values of the preferred model are listed with the longitude, latitude, and depth.
Ranges of longitude, latitude, and depth are as follows.
Longitudes: 139.40 - 140.60 (0.01 degrees interval)
Latitude: 37.90 - 39.25 (0.01 degrees interval)
Depths: 1 - 40 km (1 km interval)

3. Information about the measurement and the data analysis
File name: MT_station_information.pdf

The column 'system' in each table means the measurement system: ADU system (Metronix) or MTU system (Phoenix Geophysics). Magnetic field station means the station whose horizontal magnetic field components were used as the independent variables (predictor variables)  for the response function estimation. For the stations at which the magnetic field data were not measured or were not properly measured, the horizontal magnetic field components of another station were used for estimating response functions. SWU and ESS indicate Sawauchi and Esashi stations, respectively, which were used as the reference stations for the remote reference method (Gamble et al., 1979).