4.1.5. IP Inversion

The program ipsen3d_55.exe constructs the sensitivitiy matrix for the linearized IP inversion.

4.1.5.1. Running the Program

To run the executable, open a command window and type the following:

../../_images/run_sensitivity.png

Essentially you are calling the path to the executable followed by the path to the input file .

4.1.5.2. Units

  • IP data: Depends on the IP data type set in the observations file, the data are either secondary voltage or apparent chargeability

  • Background conductivity model: S/m

  • Chargeability model: intinsic chargeability - unitless from [0,1)

4.1.5.3. Output Files

The program ipsen3d_55.exe creates the following output files:

  • ipinv3d.mtx: binary file containing the sensitivity matrix for the IP inversion

  • ipsen3d.log: log file for the program

  • sensitivity.txt: the average IP sensitivities of the cells for the models provided.

  • obs.loc: if the survey file used surface format, the code will output a general locations file that contains the elevations of the electrodes projected to the discrete topography.