Thread: SAC time shift help

Started: 2011-03-30 18:39:26
Last activity: 2011-03-30 18:39:26
Topics: SAC Help
Robert
2011-03-30 18:39:26
Hello,

I am trying to rotate two different components and then shift one of the
components by 1 sec, I am correcting for anisotropy. I have looked through
the sac manual and can not find a command to accomplish this time shift. Is
it the ADD command. My understanding is that ADD would increase amplitude,
not shift time. What is the command to shift a component by 1 sec ( ie move
each data point forward/backward by 1 sec. )? Any help would be greatly
appreciated.

Thank you,

C. Robert Lock

  • Januka Attanayake
    2011-03-30 15:57:58
    to do a backward shift you might be able to use cuterr fillz, add zeros (1sec long) to the front end of the time series

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    --- On Wed, 3/30/11, Robert Lock <crobert.lock<at>gmail.com> wrote:

    From: Robert Lock <crobert.lock<at>gmail.com>
    Subject: [SAC-HELP] SAC time shift help
    To: sac-help<at>iris.washington.edu
    Date: Wednesday, March 30, 2011, 11:39 AM

    Hello,


    I am trying to rotate two different components and then shift one of the components by 1 sec, I am correcting for anisotropy. I have looked through the sac manual and can not find a command to accomplish this time shift. Is it the ADD command. My understanding is that ADD would increase amplitude, not shift time. What is the command to shift a component by 1 sec ( ie move each data point forward/backward by 1 sec. )? Any help would be greatly appreciated.


    Thank you,


    C. Robert Lock

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