Important

In the spring of 2022, a new suite of FDEM OcTree codes were compiled: E3DRH, E3DRH v2 and E3DRH v2 tiled. These codes use a right-handed coordinate system; as opposed to the modified left-handed coordinate system used by E3D, E3D v2 and E3D v2 tiled. You are currently viewing the manual for the package which uses ‘e3drh.exe’ to forward model and invert FDEM data. The manual for the original E3D v1 package (which uses ‘e3d.exe’) can be found here .

4. Running the programs

This section provides describes how to run all executables pertaining to the E3DRH package.

Note

All executable files, input files, output filenames and files specified within input files can be specified in the following manner:

  • as just the filename if contained within the current working directory (Example: filename.txt)

  • as a file path relative to the current working directory (Example: sub_dir\filename.txt)

  • as the full path (Example: C:\Users\Name\Tests\filename.txt)

Executable files should not be renamed. However, input file names can be specified by the user if desired.

The main executable programs within the E3DRH version 1 program library are:

  • create_octree_mesh_e3d: creates an OcTree mesh based on the survey geometry

  • e3drh: used to forward model or invert FEM data

The following Octree utility programs may also be helpful:

  • blk3cell: creates conductivity models on the underlying tensor mesh

  • 3DModel2Octree: interpolates models from tensor to OcTree meshes

  • create_weight_file: creates the weighting on each cell in the model

  • interface_weights: creates weights on the faces of cells

Contents:

To learn the specifics of running each executable, see the following sections: