The Bureau of Mines expressly declares that there are no warrenties expressed or implied which apply to the software contained herein. Units for length, travel times, and velocities must be self-consistent. For labeling in the program, sources are assumed to be on the left and receivers on the right side. Pixel 1 is at top left. Pixel 2 is next pixel in top row.
All data are in list-directed format.
Input numbers must be separated by a space or comma. They do not need to be in particular columns. Any value other than 1 suppresses the corresponding printing or display. They should be set to minimize the intersection of nodes by rays, by approximately centering source and receiver positions vertically in pixels. If pixel 1 is too far above or to the left of the paths, then pixel indices may be larger than the dimension.