A standalone Epsi is a little more complicated to process than an Epsi Minnow or Epsi Mako because there is no CTD data incorporated into the .modraw file.

This means that, after converting .modraw to .mat data, you need to add your CTD data in the same format. The easiest way to do this is to divide your CTD data into the same time chunks as your .modraw files and update the individual .mat files so they contain both epsi. and ctd. structures. From there, the processing steps are the same.