4.1.3. Inversion Program
The inversion is carried out using the h3dtdinv.exe executable program and an input file that MUST be name h3dtdinv.inp. To run the executable, open a command window and type the following:
4.1.3.1. Units
Electric field data: Ex, Ey and Ez in units V/m
Magnetic field data: Hx, Hy and Hz in units A/m.
Magnetic field data: dBx/dt, dBy/dt and -dBz/dt in units T/s. The vertical component of dB/dt is represented using -dBz/dt due to a long-standing plotting convention
Conductivity model: S/m
Reference/starting conductivity model: S/m
Model/interface weights: unitless
Important
Any combination of data, electric and or magnetic field components, can be be inverted. A specified flag at the start of the observations file can be used to omit columns or individual datums.
4.1.3.2. Output Files
The program h3dtdinv.exe creates the following output files:
dpred_0.txt data predicted using the starting model or forward model
inv_xx.con: recovered model at iteration ‘xx’
dpred_xx.txt data predicted using model ‘xx’
inv.con: final conductivity model
h3dtd.log: log file for the inversion
h3dtd.out: stores details regarding the inversion