bedt infil tmin tmax ifirst ilast idecm iantia infil =input file name to edit tmin =minimum time to extract data tmax =maximum time to extract data ifirst =first trace to extract (<0 pads left) ilast =last trace to extract (>ntraces pads right) idecm =decimation factor (idecm>0) =interpolation factor (idecm<0) EXAMPLES: idecm=1 keep same sample interval idecm=2 output every other sample idecm=-2 output samples between originals iantia =0 no anti-alias filter for resample =1 use anti-alias filter for resample
Figure 67 shows an example where a data set is resampled to include only 0 to 200 msec. of data, only first 6 traces, and interpolated to .00025 seconds per sample. The command:
bedt c008.seg 0 .2 1 6 -2
Sinc interpolation does not add any additional frequencies beyond the original Nyquist.
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