3. Elements of the TDoctree version 1 package

This section provides a brief description of each program in the TDoctree version 1 tiled package. In addition, we describe the file formats for all input and supporting files used by the coding library.

3.1. Program Library

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

• create_octree_td_tiled: creates a global OcTree mesh for the inversion based on the survey geometry and a set of local OcTree meshes about each transmitter and its receivers

• tdoctree_tiled: used to forward model and inverted TEM data

Also included are the following Octree utility programs:

• extract_mesh: extracts a specified local OcTree mesh from a hexidecimal file containing all local forward meshes

• blk3cellOct: creates block models directly on OcTree meshes

• interface_weights: generates interface weights

3.2. Main Input Files

Here, we describe the main input files for executables contained with the TDoctree version 1 tiled coding package.

• 3.2.1. Create OcTree mesh
  • 3.2.1.1. Line Descriptions
• 3.2.2. Create OcTree model
• 3.2.3. Forward modeling
• 3.2.4. Create face weights
  • 3.2.4.1. Line Descriptions
• 3.2.5. Inversion
  • 3.2.5.1. Line Descriptions

3.3. Supporting Files

Here, we describe the formats of supporting files used to run TDoctree executable files. The input files for each executable program are described in the running the programs section.

• 3.3.1. Survey and Locations File
• 3.3.2. Predicted Data File
• 3.3.3. Observations File
• 3.3.4. Topography File
• 3.3.5. OcTree Mesh File
• 3.3.6. Local Forward Meshes File
• 3.3.7. Model File
• 3.3.8. Model and Face Weights Files
• 3.3.9. Wave File
• 3.3.10. Time Indecies File
• 3.3.11. Active Tiles File