Synopsis
		sfboxsmooth < in.rsf > out.rsf repeat=1 rect1=1 rect2=1 ...

rectN defines the size of the smoothing stencil in N-th dimension.

Parameters
		int repeat=1 repeat filtering several times

Used In
		BEI          fdm/kjartjac vela/strat vela/stack   GEE          ajt/cunha lsq/invstack