GSAC Command Reference Manual                                BANDPASSSUMMARY:BandPass filter tracesBandPass [options] where options is one or more of the following:[Butter ] [ Corner fl  fh] [ NPoles npoles ] [ Passes npass] INPUT:       Butter  : Butterworth filter       Corner  : Corner frequencies (R) range 0 - Nyquist       NPoles  : Number of poles  (I) range 1 - 10       Passes  : Number of passes (I) range 1 - 2DESCRIPTION:     Highpass filter using a BI-LINEAR Z-transformation implementation ofa highpass filter. A bi-linear method is chosen since this is easilyimplemented algebraically. Passes = 1 gives a causal filter while Passes = 2 gives a zero-phase filter with a 6db point at the corner frequency.EXAMPLES:Bandpass with corner frequencies at 1 and 10 Hz, zero phase, 2-pole     BP C 1 10 P 2 NP 2HEADER VALUES SET	USER1 = permin, USER2=permax, where permin=1.0/(filt_fh), and	permax= 1.0/(filt_fl) for use by sacmft96 adn sacpom96SEE ALSO:	LOWPASS, HIGHPASS, BANDREJECT