Travel-time Methods Velocity File
Velocity files are used to specify the velocity of each element in the computational mesh. Velocity files are produced during mesh generation and inversion, but can also be user generated. The order of velocity values listed in the velocity file is the same order as the listing of the elements in the elements file produced by tetgen. There are no naming requirements for the input velocity file, but they generally end with <.vel> in the E4D documentation and examples.
See File Syntax Rules for specific details.
| Variable Name | Description |
|---|---|
| n_speed n_col
(int) (int) |
n_speed is the number of velocity values (must be equal to the number of elements in the mesh)
n_col is the number of columns in the file (1 for TT) |
| speed
(int) |
 repeat for n_speed
speed is the velocity value for each element |
TT Example
4 1 n_speed ncol 2.0 speed_1 velocity value for element 1 2.0 speed_2 velocity value for element 2 2.0 ... 2.0