Synopsis
		sfheaderwindow mask=head.rsf < in.rsf > out.rsf

The input data is a collection of traces n1xn2,
mask is an integer array os size n2, windowed is n1xm2,
where m2 is the number of nonzero elements in mask.

Parameters
		file mask= auxiliary input file name

Used In
		CWP          jse2006RWEImagingOverturningReflections/sigsbee   DATA          alaska/bash nankai/shots   GEE          ajt/galilee hlx/helgal iin/galilee noiz/antoine noiz/mad noiz/rbst   JSG          nmo3/mcelroy   RSF          scons/rsf su/rsflab11 su/rsflab12 su/rsflab13 su/rsflab14 su/rsflab16   SEP          bspl/sei3d burg/gtens seaofgal/gal