Do all SAC responses have one additional zero? [Article]
Q: I see that the instrument response in RESP and SAC file formats is slightly different in the Poles and Zeroes section. In the SAC file, there is an additional "one zero". Is the SAC res
- How do I request a copy of the SAC software? [Article]
SAC (Seismic Analysis Code) is a general purpose interactive program designed for the study of sequential signals, especially timeseries data. Emphasis has been
- Generate a Summary File Using JWEED [Article]
Q: After receiving the SEED file that I requested, how can I add the summary file when using rdseed to extract the data? I want to add the summary file because I want the outpu
- SAC Questions [Article]
Question: Where is the SAC User Manual? Answer: http://www.iris.ed
- SAC-help mailing list [Article]
...send a question to the SAC USER Group? A: About sac-help sac-help is a forum for SAC users to exc...
- How do I use rdseed? [Article]
A: Detailed instructions for using rdseed are available in the online rdseed manual.
- SAC file format [Article]
A SAC formatted data file generally contains a single, contiguous segment of time-series data structured as a header section followed by floating point data values. The SAC file format can be eit
- Where do I download software? [Article]
A: IRIS Provides Software online through the web page http://www.iris.edu/software You can navigate from this point to various ki
- How do I interpret the SAC ASCII data files? [Article]
Q: I have a few questions regarding the Mexicali Event files that I downloaded: 1. I attached a image showing all the files I received from the Seismogram tab -- I understand "B
- Cannot find origin time in SAC header [Article]
Q: I requested some sac files using Wilber II. I noticed that the time following the "KZTIME" header in the sac file is different from the origin time of the event that I request
- ms2sac error for miniseed records [Article]
Q: I concatenated a bunch of miniseed records together and then ran “ms2sac” to convert them as SAC file. I got “Max slew exceeded - time series premature
- What are the fields in a RESP file? [Article]
...f RESP files were posted by Sheila Peacock to the sac-help mailing list, which follow. Meaning of n...
- I requested some data and got a file back that I can't read. What do I do w... [Article]
Q: I requested some data and got a file back that I can't read. What do I do with this file? A: It is first necessary to identify what kind of file this is. Look
- How do I remove the instrument response from the data? [Article]
Q: How do I remove the instrument response from the data? A: Data is normally delivered to users in a raw recorded value that does not reflect the scale and characteristi
- Trouble installing the SAC software [Article]
Q: I am having trouble installing the SAC software. Where can I get help? A: First read the installation instructions that are included with the SAC software. If yo
- When do you add data for aftershocks? [Article]
Q: I'm looking for a Wells, NV aftershock that occurred on February 22 2008. How long does it typically take for you to post data? (I'm trying to download wave forms using
- Where do I find software manuals? [Article]
Q: I need help learning software I downloaded from IRIS. Where do I find the software manuals? A: Software manuals are available online at [
- What is the difference between assembled and customized data? [Article]
Assembled Data Some data comes to the DMC in a format other than SEED, such as SEG-Y or SAC. These data are considered "assembled" because they are unique to a project or experiment a
- How to request data in SAC format [Article]
Q: I was wondering how I can request data in SAC format? In the BREQ_FAST request description there is no option for SAC. A: You are correct in that BREQ_FAST does n
- How do I get station response information? [Article]
Station response information is part of the SEED data format and is also readily accessible in different forms from the IRIS DMC database. If you have a SEED file and wish to get stat
