VDIFF

 

A program to take the difference of two v.in files having the same number and position of boundary and velocity nodes

Files

Input file: v1.in is the input file v.in containing  the velocity 
   model used by RAYINVR

Input file: v2.in is the input file v.in containing  the velocity 
   model used by RAYINVR

Output file: vdiff.out contains the difference between  the files 
   v2.and v1.in;  it has  the  same x-coordinates  as v1.in  and  
   v2.in, but the difference of the v2.in values minus the v1.in 
   values for each boundary depth and velocity

The value of  xmax is  input interactively. The  main purpose  of 
VDIFF is to allow the resolution of a final model to be tested by 
observing how the  perturbation of  a single  model parameter  is 
"smeared" into adjacent  parameters. To  do this, the  difference 
between the original  final model  and the  final model  obtained 
after inverting  the data  generated by  the final  model with  a 
single parameter perturbation is taken. VDIFF may also be used to 
compare a final model with the true model in a synthetic test.