Thread: Fwd: band pass filter problem

Started: 2015-01-24 00:17:40
Last activity: 2015-01-24 00:17:40
Topics: SAC Help
simon
2015-01-24 00:17:40
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


Attachments
  • Satish_iitb
    2015-01-23 14:26:52
    (no body)
    Attachments
  • Milton Plasencia
    2015-01-23 16:57:55
    Hi,

    this is a border effects, the sac command taper is sufficient to avoid it.

    HTH,

    m.
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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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