A forum for SAC users to exchange ideas and ask questions about SAC usage, installation, portability, etc.
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Active Message Threads for March 2016
Abhash Kumar
Hi,
I am using "readsp" and "divf" to divide two amplitude spectral files
as shown below and getting error message:
SAC> readsp 2012.156.10.37.GREEN.EHE.SAC.am
SAC> divf 2012.122.09.56.GREEN.EHE.SAC.am
ERROR 1307: Illegal operation on spectral file
2012.156.10.37.GREEN.EHE.SAC.am
When I use read command instead of readsp and take output of the divison to
a third file, I don't get error, but the third file is not a amplitude
spectrum file rather a X and Y file:
SAC> read 2012.156.10.37.GRE…
[more]
Replies
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Fwd: Spectral divison - Abhash Kumar - 2016-03-25 23:49:42
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Re: Spectral divison - Milton Plasencia - 2016-03-26 13:07:48
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Re: Spectral divison - George Helffrich - 2016-03-26 21:44:32
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dery.marsan@students.itb.ac.id
2016-03-10 00:57:30
- 2016-03-21 14:52:46
Hi,
Honestly I'am a new Linux user and I had several problem about installing SAC in my computer.
My computer using Linux mint (64 bit), and I have been following the installation instruction like the picture below when installing file sac-101.6a-linux_x86_64.tar.gz
And, when I try to running sac, the output still the same like this :
Can you give me the solution for this? Thank you for your attention
Replies
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Re: [Spam identified: CeSIT-OGS] Problem in Installing SAC software - Milton Plasencia - 2016-03-19 02:19:39
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Fwd: Re: [Spam identified: CeSIT-OGS] Problem in Installing SAC software - Sheila Peacock - 2016-03-21 14:52:46
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Hi,
I used SAC transfer function to remove the instrument response to get
the actual measure of ground velocity from raw voltage count as below:
SAC> r 2012.156.10.33.GREEN.EHE.SAC
SAC> ch LOVROK TRUE (raw sac file has false, so I first changed it to make
the file over-writable)
SAC> wh
SAC> rtr
SAC> taper
SAC> TRANS FROM EVALRESP FNAME RESP.GC.GREEN..EHE TO VEL FREQLIM 1 3 20 50
SAC> wh
SAC> exit
I checked the header of sac file after removing the response and now the
IDEP is velocity i…
[more]
Replies
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Re: SAC Transfer function - Geo . - 2016-03-18 17:07:03
Hi,
I have SAC files (attached example) and the waveform look like velocity
signal, but the sac header shows the physical unit of displacement in
nanometer (with IDEP=6). This discrepancy is perhaps due to extracting the
sac files directly from the miniseed file that does not contain any
information about the physical unit. I am wondering to use "Transfer"
function of sac to remove the instrument response and get the real ground
velocity (nanometer/second). I have the response file (attached…
[more]
Replies
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Re: Removing instrument response - Milton Plasencia - 2016-03-08 02:18:11
Edgar Paz
Hi, everyone! I'm working on a local magnitude scale and I need to convert data (which is in meters) to Wood-Anderson. I'm not sure if the parameters in transfer for Wood-Anderson (you know, when you write "transfer from none to wa") are set to nanometers, so when I read amplitudes I don't know if they're shown in meters or nanometers. Or maybe I should change my data in meters to nanometers just before using "transfer from none to wa"? Also, do you know how to find "src" to modify wa.c? I can'…
[more]
Replies
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Re: Units for Wood-Anderson in transfer - Milton Plasencia - 2016-02-20 13:01:47
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Re: Units for Wood-Anderson in transfer - Edgar Paz - 2016-02-26 19:02:32
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Re: Units for Wood-Anderson in transfer - Milton Plasencia - 2016-02-27 04:14:32
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Re: Units for Wood-Anderson in transfer - Brian Savage - 2016-03-02 17:46:45
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Re: Units for Wood-Anderson in transfer - baigalaa@iag.ac.mn - 2017-09-27 06:00:26
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Re: Units for Wood-Anderson in transfer - Milton Plasencia - 2017-09-28 01:20:26
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