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binary/ascii read/write
by mohammed rafique Attar 27 Dec '24

27 Dec '24

Hi all, I am facing an issue with a large file. Seismic Unix has limitations when processing, reading, or writing a number of samples beyond approximately 61,500. Could you please suggest how to increase this limit for handling larger datasets? -- -- *Mohammed Rafique*

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SU list server
by Dominique Rousset 11 Dec '24

11 Dec '24

Hi, Due to a failed update of mailman, the SU list server has been offline for a few weeks. It seems to be running now (if we receive this message, it is) D.

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XDR and tirpc. installation error #86
by Fernando M. Roxo da Motta 11 Dec '24

11 Dec '24

Hi all, I finally upgraded my computer to Xubuntu 22.04 and tried to install 44R28. Naturally I got all the problemas reported at: https://github.com/JohnWStockwellJr/SeisUnix/issues/86 I read all the discussion in that thread and got not really convinced for some reason. I have changed the Makefile.config inserting after CFLAGS definition: CFLAGS += -I/usr/include/tirpc -ltirpc (BTW, did the same with C++FLAGS, ust in case) This solved the problem with the 'rpc/types.h' and possibl others. Then I stumbled upon the ld(1) messages: ....undefined reference to `xdr_<something>' Next I verified the command being executed, it was: /usr/bin/gcc -I/usr/local/geof/cwp/include -g -std=c99 -m64 -Wall -ansi -Wno-long-long -DCWP_LITTLE_ENDIAN -DSUXDR -I/usr/include/tirpc -ltirpc sucentsamp.c -L/usr/local/geof/cwp/lib -lsu -lpar -lcwp -lm -o /usr/local/geof/cwp/bin/sucentsamp Then I started to recall very old experiences in compiltion and linking of programs and changed to the program directoru and changed the command to: /usr/bin/gcc -I/usr/local/geof/cwp/include -g -std=c99 -m64 -Wall -ansi -Wno-long-long -DCWP_LITTLE_ENDIAN -DSUXDR -I/usr/include/tirpc sucentsamp.c -L/usr/local/geof/cwp/lib -lsu -lpar -lcwp -lm -ltirpc -o /usr/local/geof/cwp/bin/sucentsamp And Voilá! No errors and no complains at all! What? Didn't you get the change? It was the position of the "-ltirpc" in the command. The order of the libraries in the link edit phase can be very importante. The libraries are searched in the order they appear. I tried to find where those are inserted in the command and found out that those are, or seems to be, in every Makefile down the directory tree in the line: LFLAGS= $(PRELFLAGS) -L$L -lsu -lpar -lcwp -lm $(POSTLFLAGS) I changed the variable POSTLFLAGS in Makefile.config and it seems to work, at least in relation to the previous undefined reference. Now it is barking about: ....undefined reference to `isfinite' while linking the program "sunan.c". All references I found so far (abut 3min searching) suggest to comment the lines with the reference to "isfinite", but I am not convinced that this kind of test should be avoided at all. I am still working on it and, if solved I will come back. HTH Roxo -- ---------------- Non luctari, ludare -------------------+ WYSIWYG Fernando M. Roxo da Motta <petro(a)roxo.org> | Editor? Except where explicitly stated I speak on my own behalf.| VI !! PU5RXO | PX5Q6048 | I see text, ------------ Quis custodiet ipsos custodes?-------------+ I get text!

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Top Mute
by Erdi Apatay 12 Aug '24

12 Aug '24

Hi all! I have real seismic data and I want to apply top mute to this data. Actually, I can apply top mute to shot gathers one by one, but I wanted to create a script that could apply top mute to all of them, but I could not get a good result. Do I need to create a script that includes a loop to do this properly? What path should I follow? I would be happy if you could help Best Erdi P.S.: I attached a script I wrote ( I tried to do top mute only for the right upper side of the shot gathers for testing), and how they look after applying my script, and output of surange command.

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Makefile.config. file for macOS Sonoma 14.4.1
by N.Gülünay 23 Apr '24

23 Apr '24

I have a question to SU community: If anyone of you installed SU successfully on MAXOS Sonoma 14.4.1 (latest MacOS) I would appreciate if you could let me know which Makefile.config that you used. Thank you in advance. N. Gulunay

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End of seismic-unix.org list server failure
by Dominique ROUSSET 09 Feb '24

09 Feb '24

Hi, the seismic unix list server has been out of order for some days. If you receive this message, it means that the problem has been fixed. I you have tried to send a message in the last days, please send it again. Sorry for the inconvenience D. -- |Dominique Rousset LFCR UMR5150 / E2S UPPA / Dpt des géosciences| |Univ. Pau et des Pays de l'Adour BP 1155 F-64013 Pau Cedex - France| |mailto:dominique.rousset@univ-pau.fr http://lfc.univ-pau.fr| | Off: +33 559 407 423 Cell: +33 660 861 391 |

2 1

Nankai.su and Taiwan.su data
by youssef_g77＠yahoo.com 23 Nov '23

23 Nov '23

Hello all, I was wondering if the real 2D seismic data of Nankai and Taiwan are still available online. when I run Madagascar, I get this error "Could not download "./Nshots.su" from "http://www.ahay.org/data/nankai/Nshots.su" ". I presume the link was removed. Any idea what was the problem? Thanks

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Help with suspecfx
by mohammed rafique Attar 09 Nov '23

09 Nov '23

Hello friends, Greetings. I ran this sufft command to generate but Why is sufft giving ripple and why suspecfx different from sufft (figs attached)? Please help me with this. Thanks in advance. -- -- *Mohammed Rafique*

2 1

Velocity interpolation
by Glenn Reynolds 24 Jul '23

24 Jul '23

Given picked stacking velocities, is there an easy way to grid and visualise them? If I pick every 100th CDP, I would like to see a full velocity model for the line, in either time or depth. Cheers Glenn

2 2

PSDM Flow
by Glenn Reynolds 22 Jul '23

22 Jul '23

Does anyone have a basic flow for PSDM? Another user has asked about a detailed interval velocity model, and has gathers that can be used. There was an exercise a few years ago where people did PSDM on a land line, which generated a velocity model. I'll post a separate question on velocity interpolation and conversion. Cheers Glenn

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