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 February 2020
Sachin Tiwari
Dear SAC users,
I apologize for putting this question here.
I am using a Neighbourhood Algorithm (NA) code *raysum_na* for receiver
function inversion. This code generated an ensemble of models in* na.nad* (NA
direct access (NAD) file of models). But when I am running this code it
generates nad file like *na.nad???* (with a question mark). I don't know
why these question marks are coming with this *na.nad* file.
Any help regarding this problem would be greatly appreciated.
Thank you very mu…
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Replies
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Re: Need help - Cliff Thurber - 2020-02-25 14:35:02
Juan Rueda
Hello.
I have a problem with the plotrecorsection command. I can't draw the travel-times on the seismograms, even with the simple example code.
I do not understand what's happening.
Thanks
SAC> datagen sub regional *.z
/usr/local/sac/aux/datagen/regional/elk.z ...knb.z ...lac.z ...mnv.z
SAC> sss
Signal Stacking Subprocess.
SAC/SSS> traveltime model iasp91 phase Pn Sn
traveltime: depth: 5.000000 km
traveltime: Pn at 57.169170 s [ t = 57.169170 s ]
traveltime: Sn at 101.…
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Replies
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Re: Plotrecordsection problem - George Helffrich - 2020-02-24 19:04:28
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RE: Plotrecordsection problem - Juan Rueda - 2020-02-24 19:54:20
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Re: Plotrecordsection problem - Geo . - 2020-02-25 12:52:10
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Abhash Kumar
Hi,
I want to join multiple SAC files of variable duration to create a single
SAC file of 24-hour duration. I extracted these SAC files from Antelope
database using db2sac. Originally, I tried to extract 24-hour long SAC
files for each station, which worked for most of the stations in the
database. However, for some stations, instead of getting one SAC file of
24-hour long, I get multiple SAC files of variable sizes for each
component. I attached output (from Antelope) SAC files for one parti…
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Replies
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Re: Joining chunks of SAC files - Robert Walker - 2020-02-05 13:07:41
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Re: Joining chunks of SAC files - rob@iris.washington.edu - 2020-02-05 10:18:28
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Re: Joining chunks of SAC files - George Helffrich - 2020-02-05 19:34:25
Zoya Zarifi
Hi,
I am trying to read signal of two earthquakes in SAC and plot the spectrograms. I need to compare the power density spectrum. How can I make the range of color scale on pds for both signals to be the same (as we do for Ylim e.g.)?
qdp off
Ylim -2e5 2e5
cut 55 80
r 2018-12-24-1324.SAC
spectrogram window 2 slice .2 method pds order 100 ymin 0 ymax 50 noscaling
pause
r 2019-02-06-1648.SAC
spectrogram window 2 slice .2 method pds order 100 ymin 0 ymax 50 noscaling
Best regards,
Zoya
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