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E4D User Guide

  • Travel-time Run Modes
    • Mesh Generation
    • Forward Modeling
    • Inverse Modeling
  • Files
    • Input
    • Output
    • Syntax Rules
  • Using E4D
    • Running E4D
    • Visualization Utilities
    • Dictionary of Terms

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  1. E4D Website
  2. E4D User Guide

Travel-time File

Travel-time files specify the travel-time at each mesh node. They are optionally produced in forward run modes as specified in the output options file, and can be written to an exodusII format using bx or xdmf/h5 file using px for visualization. For inverse modes, the travel-time file is overwritten at each iteration.

See File Syntax Rules for specific details.

  • TT
Variable Name Description
n_nodes   n_col

(int)           (int)

n_nodes is the number of travel-time values (must be equal to the number of nodes in the mesh).

n_col is the number of columns in the file (1 for TT).

tt_i

(int)

repeat icon repeat for n_nodes

tt_i is travel-time value for each node.

TT Example

4 1  n_nodes ncol
0.01 tt_i_1  travel-time value for node 1
0.01 tt_i_2  travel-time value for node 2
0.01 ...
0.01

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