Synopsis
		sffdip < in.rsf > out.rsf mask=mask.rsf n4=2 liter=20 rect1=1 rect2=1 rect3=1 verb=n

Parameters
		int liter=20 number of linear iterations   string mask= auxiliary input file name   int n4=2 what to compute in 3-D. 0: in-line, 1: cross-line, 2: both   int rect1=1 dip smoothness on 1st axis   int rect2=1 dip smoothness on 2nd axis   int rect3=1 dip smoothness on 3rd axuis   bool verb=n [y/n] verbosity flag

Used In
		DATA          alaska/line31-81-m8r