Thread: Re: Dear Sir

Started: 2014-05-16 21:37:03
Last activity: 2014-05-16 21:37:03
Topics: SAC Help
Milton Plasencia
2014-05-16 21:37:03

Nasir,
I see your Sac files the HHN file is corrupt, but it is not important.

To pass from 100 sps to 20 sps, you must to use the decimate command,

r ISBA_PK_HHE
decimate 5
w ISBA_PK_HHE_20

Give a look in decimate command help, factor 5 means
divide 100sps/5=20 sps

HTH,

Milton P. Plasencia Linares
mpplasencia<at>gmail.com



On May 16, 2014, at 9:00 AM, nasir mahmood <earthq5<at>yahoo.com> wrote:

Dear Sir
hopefully you will be fine and good. I have small question about the SAC, if you can help me it will be great.
I want to run a moment tensor program, but fortran code did not recognize my data. I attache ISBA and KSR station SAC files. I want to know how I can change my data files for ISBA station ( with sampling rate 100sps) exactly similar to KSR station( with 20SPS) which work fine available inside program example.
How I can filter the data to the common freq. range to avoid possible aliasing effect due to decimation, and how I can make the data in the same physical unit. I mean how I can do this in SAC. I mean I want to make ISBA similar to KSR station.
I will be greatful to you.
best wishes,
Nasir

<ISBA_PK_HHE><ISBA_PK_HHN><ISBA_PK_HHZ><KSR_A1_BLE><KSR_A1_BLN><KSR_A1_BLZ>


  • vipul silwal
    2014-05-16 12:09:15
    If you really don't want high frequency data you should perhaps filter it
    before decimating.
    On May 16, 2014 4:37 AM, "Milton Plasencia" <mpplasencia<at>gmail.com> wrote:


    Nasir,
    I see your Sac files the HHN file is corrupt, but it is not important.

    To pass from 100 sps to 20 sps, you must to use the decimate command,

    r ISBA_PK_HHE
    decimate 5
    w ISBA_PK_HHE_20

    Give a look in decimate command help, factor 5 means
    divide 100sps/5=20 sps

    HTH,

    Milton P. Plasencia Linares
    mpplasencia<at>gmail.com



    On May 16, 2014, at 9:00 AM, nasir mahmood <earthq5<at>yahoo.com> wrote:

    Dear Sir
    hopefully you will be fine and good. I have small question about the SAC,
    if you can help me it will be great.
    I want to run a moment tensor program, but fortran code did not recognize
    my data. I attache ISBA and KSR station SAC files. I want to know how I can
    change my data files for ISBA station ( with sampling rate 100sps)
    exactly similar to KSR station( with 20SPS) which work fine available
    inside program example.
    How I can filter the data to the common freq. range to avoid possible
    aliasing effect due to decimation, and how I can make the data in the same
    physical unit. I mean how I can do this in SAC. I mean I want to make ISBA
    similar to KSR station.
    I will be greatful to you.
    best wishes,
    Nasir

    <ISBA_PK_HHE><ISBA_PK_HHN><ISBA_PK_HHZ><KSR_A1_BLE><KSR_A1_BLN>
    <KSR_A1_BLZ>



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