Thread: Question about the date format in SAC Pole Zero files: 1996.033.24.60.60.99999

Started: 2014-04-18 22:21:08
Last activity: 2014-04-23 01:18:42
Topics: SAC Help
Mike Padgett
Question about the date format in SAC Pole Zero files: 1996.033.24.60.60.99999
2014-04-18 22:21:08
In decoding the date format in SAC Pole Zero files produced by rdseed, a
time of Hour = 24, Minute=60, Seconds = 60.99999 is encountered.



Should an hour of 24 add 1 day to the date?

Should 60 minutes add 1 hour to the number of hours?



For instance, in the case of "1996.033.24.60.60.99999", should it be
decoded to:



Year = 1996

Month = 2

Day = 3

Hour =1

Minutes = 1

Seconds = .99999



Alternatively, how is "1996-02-02T24:60:60" as shown in the file below, to
be decoded?

Is there something special about the "T" in the date format?



The file name is:



SAC_PZs_CI_PAS_VHZ__1996.029.00.00.00.0000_1996.033.24.60.60.99999





* **********************************

* NETWORK (KNETWK): CI

* STATION (KSTNM): PAS

* LOCATION (KHOLE):

* CHANNEL (KCMPNM): VHZ

* CREATED : 2014-03-31T16:34:17

* START : 1996-01-29T00:00:00

* END : 1996-02-02T24:60:60

* DESCRIPTION : Pasadena, California, USA

* LATITUDE : 34.148440

* LONGITUDE : -118.171170

* ELEVATION : 314.0

* DEPTH : 0.0

* DIP : 0.0

* AZIMUTH : 0.0

* SAMPLE RATE : 0.1

* INPUT UNIT : M

* OUTPUT UNIT : COUNTS

* INSTTYPE : Streckeisen STS-1V/VBB Seismometer

* INSTGAIN : 2.510500e+03 (M/S)

* COMMENT : N/A

* SENSITIVITY : 1.684800e+10 (M/S)

* A0 : 3.948580e+03

* **********************************

ZEROS 3

+0.000000e+00 +0.000000e+00

+0.000000e+00 +0.000000e+00

+0.000000e+00 +0.000000e+00

POLES 4

-1.234000e-02 +1.234000e-02

-1.234000e-02 -1.234000e-02

-3.918000e+01 +4.912000e+01

-3.918000e+01 -4.912000e+01

CONSTANT +6.652568e+13




  • Milton Plasencia
    Re: Question about the date format in SAC Pole Zero files: 1996.033.24.60.60.99999
    2014-04-22 16:34:50
    Hi,

    Is an error in the SEED (Response and P&Z) file, because the user
    enter the START and END date and time of experiment.
    -----------------------
    The format is:
    YYYY-MM-DDThh:mm:ssTZD
    where:
    YYYY = four-digit year
    MM = two-digit month (01=January, etc.)
    DD = two-digit day of month (01 through 31)
    hh = two digits of hour (00 through 23) (am/pm NOT allowed)
    mm = two digits of minute (00 through 59)
    ss = two digits of second (00 through 59)
    TZD = time zone designator
    ----------------

    You can see the ISO-8601 for representation of dates and times.
    There, you can find the "T" separator between date and time,
    "T" indicates the beginning of the time part.

    HTH,

    Milton

    * * * * * * * * * * * * * * * * * * * * * * *
    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)
    *********************************











    On Apr 18, 2014, at 10:21 PM, Mike Padgett <mpadgett<at>quantum-earth.com> wrote:

    In decoding the date format in SAC Pole Zero files produced by rdseed, a time of Hour = 24, Minute=60, Seconds = 60.99999 is encountered.

    Should an hour of 24 add 1 day to the date?
    Should 60 minutes add 1 hour to the number of hours?

    For instance, in the case of “1996.033.24.60.60.99999”, should it be decoded to:

    Year = 1996
    Month = 2
    Day = 3
    Hour =1
    Minutes = 1
    Seconds = .99999

    Alternatively, how is “1996-02-02T24:60:60” as shown in the file below, to be decoded?
    Is there something special about the “T” in the date format?

    The file name is:

    SAC_PZs_CI_PAS_VHZ__1996.029.00.00.00.0000_1996.033.24.60.60.99999


    * **********************************
    * NETWORK (KNETWK): CI
    * STATION (KSTNM): PAS
    * LOCATION (KHOLE):
    * CHANNEL (KCMPNM): VHZ
    * CREATED : 2014-03-31T16:34:17
    * START : 1996-01-29T00:00:00
    * END : 1996-02-02T24:60:60
    * DESCRIPTION : Pasadena, California, USA
    * LATITUDE : 34.148440
    * LONGITUDE : -118.171170
    * ELEVATION : 314.0
    * DEPTH : 0.0
    * DIP : 0.0
    * AZIMUTH : 0.0
    * SAMPLE RATE : 0.1
    * INPUT UNIT : M
    * OUTPUT UNIT : COUNTS
    * INSTTYPE : Streckeisen STS-1V/VBB Seismometer
    * INSTGAIN : 2.510500e+03 (M/S)
    * COMMENT : N/A
    * SENSITIVITY : 1.684800e+10 (M/S)
    * A0 : 3.948580e+03
    * **********************************
    ZEROS 3
    +0.000000e+00 +0.000000e+00
    +0.000000e+00 +0.000000e+00
    +0.000000e+00 +0.000000e+00
    POLES 4
    -1.234000e-02 +1.234000e-02
    -1.234000e-02 -1.234000e-02
    -3.918000e+01 +4.912000e+01
    -3.918000e+01 -4.912000e+01
    CONSTANT +6.652568e+13

    _______________________________________________
    sac-help mailing list
    sac-help<at>iris.washington.edu
    http://www.iris.washington.edu/mailman/listinfo/sac-help


    • Robert Casey
      Re: Question about the date format in SAC Pole Zero files: 1996.033.24.60.60.99999
      2014-04-22 16:05:02

      I almost would have guessed it was trying to represent a leap second, but there were none in 1996 as far as I can tell. Our sacpz web service returns:
      * **********************************
      * NETWORK (KNETWK): CI
      * STATION (KSTNM): PAS
      * LOCATION (KHOLE):
      * CHANNEL (KCMPNM): VHZ
      * CREATED : 2014-04-22T16:01:11
      * START : 1996-01-29T00:00:00
      * END : 1996-02-02T00:00:00
      * DESCRIPTION : Pasadena, California, USA
      * LATITUDE : 34.148440
      * LONGITUDE : -118.171170
      * ELEVATION : 314.0
      * DEPTH : 0.0
      * DIP : 0.0
      * AZIMUTH : 0.0
      * SAMPLE RATE : 0.1
      * INPUT UNIT : M
      * OUTPUT UNIT : COUNTS
      * INSTTYPE : Streckeisen STS-1V/VBB Seismometer
      * INSTGAIN : 2.510500e+03 (M/S)
      * COMMENT :
      * SENSITIVITY : 1.684800e+10 (M/S)
      * A0 : 3.948580e+03
      * **********************************
      ZEROS 3
      +0.000000e+00 +0.000000e+00
      +0.000000e+00 +0.000000e+00
      +0.000000e+00 +0.000000e+00
      POLES 4
      -1.234000e-02 +1.234000e-02
      -1.234000e-02 -1.234000e-02
      -3.918000e+01 +4.912000e+01
      -3.918000e+01 -4.912000e+01
      CONSTANT 6.652568e+13


      If the SEED header representation of the end time is not strange, then this would be a bug in rdseed. This should be verified first.

      Is this rdseed 5.3.1? Must be pretty recent since you're getting the new annotated SACPZ format.

      -Rob



      On Apr 22, 2014, at 12:34 AM, Milton Plasencia wrote:

      Hi,

      Is an error in the SEED (Response and P&Z) file, because the user
      enter the START and END date and time of experiment.
      -----------------------
      The format is:
      YYYY-MM-DDThh:mm:ssTZD
      where:
      YYYY = four-digit year
      MM = two-digit month (01=January, etc.)
      DD = two-digit day of month (01 through 31)
      hh = two digits of hour (00 through 23) (am/pm NOT allowed)
      mm = two digits of minute (00 through 59)
      ss = two digits of second (00 through 59)
      TZD = time zone designator
      ----------------

      You can see the ISO-8601 for representation of dates and times.
      There, you can find the "T" separator between date and time,
      "T" indicates the beginning of the time part.

      HTH,

      Milton

      * * * * * * * * * * * * * * * * * * * * * * *
      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)
      *********************************











      On Apr 18, 2014, at 10:21 PM, Mike Padgett <mpadgett<at>quantum-earth.com> wrote:

      In decoding the date format in SAC Pole Zero files produced by rdseed, a time of Hour = 24, Minute=60, Seconds = 60.99999 is encountered.

      Should an hour of 24 add 1 day to the date?
      Should 60 minutes add 1 hour to the number of hours?

      For instance, in the case of “1996.033.24.60.60.99999”, should it be decoded to:

      Year = 1996
      Month = 2
      Day = 3
      Hour =1
      Minutes = 1
      Seconds = .99999

      Alternatively, how is “1996-02-02T24:60:60” as shown in the file below, to be decoded?
      Is there something special about the “T” in the date format?

      The file name is:

      SAC_PZs_CI_PAS_VHZ__1996.029.00.00.00.0000_1996.033.24.60.60.99999


      * **********************************
      * NETWORK (KNETWK): CI
      * STATION (KSTNM): PAS
      * LOCATION (KHOLE):
      * CHANNEL (KCMPNM): VHZ
      * CREATED : 2014-03-31T16:34:17
      * START : 1996-01-29T00:00:00
      * END : 1996-02-02T24:60:60
      * DESCRIPTION : Pasadena, California, USA
      * LATITUDE : 34.148440
      * LONGITUDE : -118.171170
      * ELEVATION : 314.0
      * DEPTH : 0.0
      * DIP : 0.0
      * AZIMUTH : 0.0
      * SAMPLE RATE : 0.1
      * INPUT UNIT : M
      * OUTPUT UNIT : COUNTS
      * INSTTYPE : Streckeisen STS-1V/VBB Seismometer
      * INSTGAIN : 2.510500e+03 (M/S)
      * COMMENT : N/A
      * SENSITIVITY : 1.684800e+10 (M/S)
      * A0 : 3.948580e+03
      * **********************************
      ZEROS 3
      +0.000000e+00 +0.000000e+00
      +0.000000e+00 +0.000000e+00
      +0.000000e+00 +0.000000e+00
      POLES 4
      -1.234000e-02 +1.234000e-02
      -1.234000e-02 -1.234000e-02
      -3.918000e+01 +4.912000e+01
      -3.918000e+01 -4.912000e+01
      CONSTANT +6.652568e+13

      _______________________________________________
      sac-help mailing list
      sac-help<at>iris.washington.edu
      http://www.iris.washington.edu/mailman/listinfo/sac-help

      _______________________________________________
      sac-help mailing list
      sac-help<at>iris.washington.edu
      http://www.iris.washington.edu/mailman/listinfo/sac-help


      • Milton Plasencia
        Re: Question about the date format in SAC Pole Zero files: 1996.033.24.60.60.99999
        2014-04-23 01:18:42

        Hi Rob,

        Is very good to know the web services return the correct end time.

        So, the ball pass to Mike, about the rdseed version used.

        Cheers,

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



        On Apr 22, 2014, at 6:05 PM, Robert Casey <rob<at>iris.washington.edu> wrote:


        I almost would have guessed it was trying to represent a leap second, but there were none in 1996 as far as I can tell. Our sacpz web service returns:
        * **********************************
        * NETWORK (KNETWK): CI
        * STATION (KSTNM): PAS
        * LOCATION (KHOLE):
        * CHANNEL (KCMPNM): VHZ
        * CREATED : 2014-04-22T16:01:11
        * START : 1996-01-29T00:00:00
        * END : 1996-02-02T00:00:00
        * DESCRIPTION : Pasadena, California, USA
        * LATITUDE : 34.148440
        * LONGITUDE : -118.171170
        * ELEVATION : 314.0
        * DEPTH : 0.0
        * DIP : 0.0
        * AZIMUTH : 0.0
        * SAMPLE RATE : 0.1
        * INPUT UNIT : M
        * OUTPUT UNIT : COUNTS
        * INSTTYPE : Streckeisen STS-1V/VBB Seismometer
        * INSTGAIN : 2.510500e+03 (M/S)
        * COMMENT :
        * SENSITIVITY : 1.684800e+10 (M/S)
        * A0 : 3.948580e+03
        * **********************************
        ZEROS 3
        +0.000000e+00 +0.000000e+00
        +0.000000e+00 +0.000000e+00
        +0.000000e+00 +0.000000e+00
        POLES 4
        -1.234000e-02 +1.234000e-02
        -1.234000e-02 -1.234000e-02
        -3.918000e+01 +4.912000e+01
        -3.918000e+01 -4.912000e+01
        CONSTANT 6.652568e+13


        If the SEED header representation of the end time is not strange, then this would be a bug in rdseed. This should be verified first.

        Is this rdseed 5.3.1? Must be pretty recent since you're getting the new annotated SACPZ format.

        -Rob



        On Apr 22, 2014, at 12:34 AM, Milton Plasencia wrote:

        Hi,

        Is an error in the SEED (Response and P&Z) file, because the user
        enter the START and END date and time of experiment.
        -----------------------
        The format is:
        YYYY-MM-DDThh:mm:ssTZD
        where:
        YYYY = four-digit year
        MM = two-digit month (01=January, etc.)
        DD = two-digit day of month (01 through 31)
        hh = two digits of hour (00 through 23) (am/pm NOT allowed)
        mm = two digits of minute (00 through 59)
        ss = two digits of second (00 through 59)
        TZD = time zone designator
        ----------------

        You can see the ISO-8601 for representation of dates and times.
        There, you can find the "T" separator between date and time,
        "T" indicates the beginning of the time part.

        HTH,

        Milton

        * * * * * * * * * * * * * * * * * * * * * * *
        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)
        *********************************











        On Apr 18, 2014, at 10:21 PM, Mike Padgett <mpadgett<at>quantum-earth.com> wrote:

        In decoding the date format in SAC Pole Zero files produced by rdseed, a time of Hour = 24, Minute=60, Seconds = 60.99999 is encountered.

        Should an hour of 24 add 1 day to the date?
        Should 60 minutes add 1 hour to the number of hours?

        For instance, in the case of “1996.033.24.60.60.99999”, should it be decoded to:

        Year = 1996
        Month = 2
        Day = 3
        Hour =1
        Minutes = 1
        Seconds = .99999

        Alternatively, how is “1996-02-02T24:60:60” as shown in the file below, to be decoded?
        Is there something special about the “T” in the date format?

        The file name is:

        SAC_PZs_CI_PAS_VHZ__1996.029.00.00.00.0000_1996.033.24.60.60.99999


        * **********************************
        * NETWORK (KNETWK): CI
        * STATION (KSTNM): PAS
        * LOCATION (KHOLE):
        * CHANNEL (KCMPNM): VHZ
        * CREATED : 2014-03-31T16:34:17
        * START : 1996-01-29T00:00:00
        * END : 1996-02-02T24:60:60
        * DESCRIPTION : Pasadena, California, USA
        * LATITUDE : 34.148440
        * LONGITUDE : -118.171170
        * ELEVATION : 314.0
        * DEPTH : 0.0
        * DIP : 0.0
        * AZIMUTH : 0.0
        * SAMPLE RATE : 0.1
        * INPUT UNIT : M
        * OUTPUT UNIT : COUNTS
        * INSTTYPE : Streckeisen STS-1V/VBB Seismometer
        * INSTGAIN : 2.510500e+03 (M/S)
        * COMMENT : N/A
        * SENSITIVITY : 1.684800e+10 (M/S)
        * A0 : 3.948580e+03
        * **********************************
        ZEROS 3
        +0.000000e+00 +0.000000e+00
        +0.000000e+00 +0.000000e+00
        +0.000000e+00 +0.000000e+00
        POLES 4
        -1.234000e-02 +1.234000e-02
        -1.234000e-02 -1.234000e-02
        -3.918000e+01 +4.912000e+01
        -3.918000e+01 -4.912000e+01
        CONSTANT +6.652568e+13

        _______________________________________________
        sac-help mailing list
        sac-help<at>iris.washington.edu
        http://www.iris.washington.edu/mailman/listinfo/sac-help

        _______________________________________________
        sac-help mailing list
        sac-help<at>iris.washington.edu
        http://www.iris.washington.edu/mailman/listinfo/sac-help



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