Synopsis
		sfshot2grid < Fr.rsf wav=Fs.rsf swf=Fsou.rsf > Frec.rsf nx= dx= ox= ny=1 dy=1 oy=0

Parameters
		float dx= x sampling   float dy=1 y sampling   int nx= x samples   int ny=1 y samples   float ox= x origin   float oy=0 y origin   file swf= auxiliary output file name   file wav= auxiliary input file name