SAC Help

A forum for SAC users to exchange ideas and ask questions about SAC usage, installation, portability, etc.

January (8)

Active Message Threads for January 2018

James Whittaker
Jan. 15, 2018, 4:07 p.m. - Jan. 16, 2018, 3:52 p.m.
Hi I have some data recorded in particle velocity and I need to convert it to particle displacement and remove the instrument response. These are 30 Hz geophones used to capture high frequency microseismic data. The script I have is : read $f rtrend int transfer from polezero subtype polesandzeros to none freqlimits 0 30 490 500 w append .comp where my polezero file is a simple, ZEROS 2 0 0 0 0 POLES 2 -41.47 183.88 -41.47 -183.88 CONSTANT 1 My concern is that I am converting to par... [more]
Nima Dolatabadi
Jan. 16, 2018, 11:16 a.m.
how can I find the unit of amplitude of my data? I mean "nm (nano-meters), m, cm and etc". Someone told me to do it through Herman package using GSAC but I could not find the code, so please help me with this issue. Best Regards
No replies
Jan. 15, 2018, 5:21 p.m. - Jan. 15, 2018, 9:48 p.m.
Hello! Someone know a link to SACHDR download? I need to read the headers of sac files in a cross-correlation script and after save in a text file. best regards, Guilherme de Melo -- Guilherme Weber Sampaio de Melo Master's seismology research - UFRN/BR
  • Re: Sachdr - Milton Plasencia - Jan. 15, 2018, 9:48 p.m.
Junjie Liu
Jan. 5, 2018, 9:18 p.m. - Jan. 6, 2018, 12:04 a.m.
From: Junjie Liu <> Date: Friday, January 5, 2018 at 2:42 PM To: "" <> Subject: SAC glitches Hi, I do not know why my SAC software always reminds me no data file read in when I try to read the data into memory. Could you please tell me why? I have attached the figure. BEST
Shimaa Ismaiel Moustafa Atia
Dec. 31, 2017, 11:43 a.m. - Jan. 1, 2018, 3:08 a.m.
Hello the sac program runs with me good but when i write a command with an extension csh like "plotsolution.csh" the "permission denied" appear and when I start this command with sudo "sudo plotsolution.csh" it keeps to inform me that the "command not found" knowing that the path and bash files are corrected and the csh pakage is installed succefully what is the solution for the message "command not found" ? I am waiting for your response thanks