Synopsis
		sfspefvstep < inp.rsf > out.rsf infil=infil.rsf lag=lag.rsf verb=n na= lambda1= lambda2=0.0f

Parameters
		string infil= initial filter (auxiliary input file name)   string lag= variable step (auxiliary input file name)   float lambda1= constant scale parameter in time axis   float lambda2=0.0f constant scale parameter in space axis   int na= filter size   bool verb=n [y/n]

Used In
		JLU          spefdecon/atten-model spefdecon/rdata spefdecon/simple