Synopsis
		sfdensity < Fin.rsf inY=FinY.rsf inZ=FinZ.rsf inW=FinW.rsf > Fout.rsf verb=n n1=20 n2=20 n3=20 n4=20

Parameters
		file inW= auxiliary input file name   file inY= auxiliary input file name   file inZ= auxiliary input file name   int n1=20 verbosity flag   int n2=20 verbosity flag   int n3=20 verbosity flag   int n4=20 verbosity flag   bool verb=n [y/n] verbosity flag