Dear Chenyu, Sac file it is ok. The custom.py is a file that you need to create ( youcan find the istruction in the website). Another option is that or you can modify the data structure already inside msnoise but probably better the first option thought... better don't touch the existing code. best regards ----------- Mr Carmelo Sammarco MSc BSc FGS PhD Student in Geology and Petroleum Geology ________________________________ From: msnoise-bounces(a)mailman-as.oma.be &lt;msnoise-bounces(a)mailman-as.oma.be&gt; on behalf of Chenyu Li &lt;lchenyu1992(a)gmail.com&gt; Sent: 24 August 2017 22:02 To: msnoise(a)mailman-as.oma.be Subject: [MSNoise] Data Structure When Using SAC File Hi, I am trying to process my SAC files with MSNoise, but I can't populate stations successfully, I suspect it is because my data are SAC files. I want to define my own data structure but I can't find the custom.py. Could any one help me with this question? Thanks a lot! Regards -- *Chenyu Li* lchenyu(a)gatech.edu PhD Candidate in Geophysics School of Earth & Atmosphere Science Georgia Institute of Technology _______________________________________________ MSNoise mailing list MSNoise(a)mailman-as.oma.be http://mailman-as.oma.be/mailman/listinfo/msnoise MSNoise Mailing List - MSNoise<http://mailman-as.oma. be/mailman/listinfo/msnoise> mailman-as.oma.be MSNoise Python Package for Monitoring Seismic Velocity Changes using Ambient Seismic Noise. MSNoise is a Python Package for Monitoring Seismic Velocity Changes using ... The University of Aberdeen is a charity registered in Scotland, No SC013683. Tha Oilthigh Obar Dheathain na charthannas clàraichte ann an Alba, Àir. SC013683. _______________________________________________ MSNoise mailing list MSNoise(a)mailman-as.oma.be http://mailman-as.oma.be/mailman/listinfo/msnoise