Program sfdrayinte | 2D Dynamic Ray Tracing 
[SYNOPSIS]
sfdrayinte < in.rsf > out.rsf deriv=deriv.rsf t0=0. shift=1. source=o[1]+(n[1]-1)/2*d[1]
[PARAMETERS]
string  | deriv | = |   | 	auxiliary input file name
float   | shift | =1. |   | 	complex source shift 
float   | source | =o[1]+(n[1]-1)/2*d[1] |   | 	source location 
float   | t0 | =0. |   | 	time origin at source 
[DIRECTORY]
user/llisiw
