Hello,
I run band pass filter using command as:
bp co 0.01 0.1 n 4 p 2
the original waveform is the top one (with dt=1.0s, npts=7200), the filtered one is at the bottom, why there is a strange wiggle in the left edge?
Jun Xie
I run band pass filter using command as:
bp co 0.01 0.1 n 4 p 2
the original waveform is the top one (with dt=1.0s, npts=7200), the filtered one is at the bottom, why there is a strange wiggle in the left edge?
Jun Xie
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Hi,
this is a border effects, the sac command taper is sufficient to avoid it.
HTH,
m.
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Milton P. PLASENCIA LINARES
Centro di Ricerche Sismologiche (CRS)
OGS - Istituto Nazionale di Oceanografia e di Geofisica Sperimentale
Borgo Grotta Gigante 42/C
(34010) Sgonico - Trieste - Italia
Tel: +39 040 2140 141 (Udine)
Tel: +39 040 2140 256 (Trieste)
Cel.: +39 331 6481 935
E-mail: mplasencia<at>inogs.it
ASAIN (Antarctic Seismographic Argentinean Italian Network)
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On Jan 23, 2015, at 06:17, Jun Xie <junxie<at>mail.ustc.edu.cn> wrote:
Hello,
I run band pass filter using command as:
bp co 0.01 0.1 n 4 p 2
the original waveform is the top one (with dt=1.0s, npts=7200), the filtered one is at the bottom, why there is a strange wiggle in the left edge?<a.jpg>
Jun Xie
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