E4D User Guide

E4D Run Configuration File (fmm.inp)

The run configuration file for E4D must be named <fmm.inp>. It is the first file read by E4D, and contains the names of input files and other options necessary for E4D to execute a particular run mode.

See File Syntax Rules for specific details.

Variable Name Description
run_mode

char

run_mode specifies the mode that E4D should execute.

run_mode=FMM1

Mesh generation for travel-time modeling and inversion
mesh_config_filename

(char)

mesh_config_filename is name of the mesh configuration file (must end in .cfg).

Example 

FMM1	run mode
two_blocks.cfg	mesh configuration file name
Variable Name Description
run_mode

char

run_mode specifies the mode that E4D should execute.

run_mode=FMM2

Travel-time survey numerical solution simulation
mesh_file

(char)

mesh_file should be set to <e4d_mesh>.1.node, or <e4d_mesh>.1.ele, where <e4d_mesh> is the prefix of the mesh files created during mesh generation.

survey_file

(char)

survey_file is the name of the user-created survey file.

velocity_file

(char)

velocity_file is the name of a velocity file or a text file containing a list of velocity files.
out_opts_file

(char)

out_opts_file is the name of the output options file.

Example 

FMM2		             run mode
two_blocks.1.node	 mesh node file name
two_blocks.srv	     survey file name
two_blocks.vel	     conductivity file name
two_blocks.out	     output options file name
Variable Name Description
run_mode

char

run_mode specifies the mode that E4D should execute.

run_mode=FMM3

Travel-time inversion for a single survey
mesh_file

(char)

mesh_file should be set to <e4d_mesh>.1.node, or <e4d_mesh>.1.ele, where <e4d_mesh> is the prefix of the mesh files created during mesh generation.

survey_file

(char)

survey_file is the name of the user-created survey file.

starting_velocity

(char)

starting_velocity is the name of a velocity file to be used as the starting model.

starting_velocity=name of velocity file

Specified velocity file will be used

starting_velocity='average'

The calculated average velocity will be used

starting_velocity=real value

The specified value will be used
out_opts_file

(char)

out_opts_file is the name of the output options file.

inv_opts_file

(char)

inv_opts_file is the name of the inversion options file.

ref_velocity

(char)

ref_velocity is the name of the reference velocity file, which is in the same format as a standard velocity file.

*Specify none if not using a reference model to constrain the inversion.

Example 


FMM3		            run mode
two_blocks.1.node 	mesh node file name
two_blocks.srv	    survey file name
'average'	        Use calculated average velocity as starting model
two_blocks.out	    output options file name
two_blocks_1.inv	inversion options file name
none	            reference velocity file name