Seisunix October 2022

seisunix@mailman.seismic-unix.org

8 participants
5 discussions

Help with fixing Trace number
by eloraafrin5＠gmail.com 08 Dec '22

08 Dec '22

Hello greetings! I am a beginner. I have a big su file with huge shot points, but I want to see a particular shot point in reduced velocity mode. I made a single file for those particular shot by using key=fldr. Now this file should have total 636 traces. I wrote a command suwind < indut su file key=tracl max=636 ....... However, in image I got values from2.84*10^5 to 2.85*10^5. Even when I want to see the image in reduced velocity mode, I need to set rv= >1000 whereas it should be rv=1 to 2. It seems like there are something wrong with units in the headers. Would anyone please help me with how can I fix these??? I am a new user; I will appreciate your help and time. Here I attached the header info. Thanks FYI 636 traces: tracl 1 636 (1-636) tracr 284929 285564 (284929-285564) fldr 2245 tracf 1 636 (1-636) cdp 2245 offset 112464 120401 (112464-120401) sx 376962 sy 5176643 gx 376962 gy 5176643 ns 2001 dt 4000

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How to handle trace header information?
by tanahashi.m＠gmail.com 11 Nov '22

11 Nov '22

Dear all, I have performed a time resample of some 500ns sampled 3D seismic data to 1ms intervals using the suresamp command as shown below, but was unable to transcribe the 189-192 bytes of the Inline and the 192-196 bytes of the crossline numbers. segyread tape=Source3D.sgy|suresamp rf=0.5|segyhdrs|segywrite tape=Output3D_1ms.sgy I solved this problem by using the ASCII input/output function for trace header on SeiSee, a free Windows software, to write out the header information of the original file and then write it into the header of the output file. Is there a way to transcribe inline and crossline numbers using the SU function? Manabu Tanahashi Tsukuba, Japan

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Help with Adding Offset Header in a SU File
by eloraafrin5＠gmail.com 27 Oct '22

27 Oct '22

Hello, I am a beginner. I need to apply sureduce command to a particular shot which is in su file format. I tried with different rv values but could not see any differences in the image. I checked with the headers of that file and found I have ns and dt headers but not offset. Can anyone please help me how can I add offset header to my su file? And please let me know if there are any other things to fix to get result. Thanks

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test message. Discard. Sorry
by Dominique ROUSSET 19 Oct '22

19 Oct '22

testing archiving of new messages -- |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 |

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The SU list manager is (at least partly) broken
by Dominique ROUSSET 17 Oct '22

17 Oct '22

Hi SU users The SU list manager is broken. At least no new subscription is possible. The las one is dated 09/23. Sticking to mailman2 inhibits the upgrade of the whole hosting system (yunohost.org). I plan to upgrade to mailman3 soon, keeping as much information as possible from the present mail server. Don't worry if you receive automatic or test messages in the next hours or days. D. BTW: I don't know if this message will be transmitted :-) -- |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 |

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Seisunix October 2022