Synopsis
		sfdipcoh < in.rsf > out.rsf dip1=dip1.rsf dip2=dip2.rsf nw=5 twod=y verb=y lag1=3 lag2=3

Parameters
		string dip1= auxiliary input file name   file dip2= auxiliary input file name   int lag1=3 maximal time lag on 2nd axis   int lag2=3 maximal time lag on 3rd axis   int nw=5 half window size for coherence   bool twod=y [y/n] y: only twod coherence   bool verb=y [y/n] verbosity