Thread: Error when merging sac files

Started: 2008-01-25 18:56:41
Last activity: 2008-01-25 18:56:41
Topics: SAC Help
Dylan Mikesell
2008-01-25 18:56:41
Everyone,

I am new to SAC and having problems with the merge command.

I am trying to merge vertical component files from one station over a
day. The data is recorded in 30 minute sections. The error I am getting
occurs as follows:

WARNING: Time gap (zeros added): 07.223.00.26.56.9462.1.sac
07.223.03.26.56.9462.1.sac
END1: 2007 223 2 56 56 681
BEG2: 2007 223 3 26 56 680


I can't figure out the problem and the headers aren't offering me any clues.

FILE: 07.223.00.26.56.9462.1.sac - 1
--------------------------------

NPTS = 450000 B = -3.200000e-01
E = 1.799676e+03 IFTYPE = TIME SERIES FILE
LEVEN = TRUE DELTA = 4.000000e-03
IDEP = UNKNOWN KZDATE = AUG 11 (223), 2007
KZTIME = 00:26:57.000 IZTYPE = EVENT ORIGIN TIME
KSTNM = 09462 CMPINC = -1.225500e+04
KEVNM = 0722300261C1 IEVTYP = EARTHQUAKE
KHOLE = LOVROK = TRUE
NVHDR = 6 NORID = 0
NEVID = 0 LPSPOL = TRUE
LCALDA = TRUE KCMPNM = 1C1
KNETWK = XX

FILE: 07.223.02.56.56.9462.1.sac - 2
--------------------------------

NPTS = 450000 B = -3.200000e-01
E = 1.799676e+03 IFTYPE = TIME SERIES FILE
LEVEN = TRUE DELTA = 4.000000e-03
IDEP = UNKNOWN KZDATE = AUG 11 (223), 2007
KZTIME = 02:56:57.000 IZTYPE = EVENT ORIGIN TIME
KSTNM = 09462 CMPINC = -1.225500e+04
KEVNM = 0722302561C1 IEVTYP = EARTHQUAKE
KHOLE = LOVROK = TRUE
NVHDR = 6 NORID = 0
NEVID = 0 LPSPOL = TRUE
LCALDA = TRUE KCMPNM = 1C1
KNETWK = XX

FILE: 07.223.03.26.56.9462.1.sac - 3
--------------------------------

NPTS = 450000 B = -3.200000e-01
E = 1.799676e+03 IFTYPE = TIME SERIES FILE
LEVEN = TRUE DELTA = 4.000000e-03
IDEP = UNKNOWN KZDATE = AUG 11 (223), 2007
KZTIME = 03:26:57.000 IZTYPE = EVENT ORIGIN TIME
KSTNM = 09462 CMPINC = -1.225500e+04
KEVNM = 0722303261C1 IEVTYP = EARTHQUAKE
KHOLE = LOVROK = TRUE
NVHDR = 6 NORID = 0
NEVID = 0 LPSPOL = TRUE
LCALDA = TRUE KCMPNM = 1C1
KNETWK = XX

When I try to plot multiple days, the errors seams to occur at the same
point in time. I am wondering if I lost the GPS timing at that time in
the day. The sensors were in a very narrow valley.
Is there anyway to figure out what is wrong or where my timing gets
messed up?

Thanks,

Dylan Mikesell
Boise State University

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