Synopsis
		sftestapef < in.rsf > out.rsf sfilt=sfilt.rsf nfilt=nfilt.rsf adj=y verb=n sign=y

Parameters
		bool adj=y [y/n] if y, perform adjoint operation   file nfilt= auxiliary input file name   file sfilt= auxiliary input file name   bool sign=y [y/n] if y, test signal PEF; otherwise, test noise PEF   bool verb=n [y/n] verbosity flag