The latest version adds a Relative Phase display, accessed from the Relative Spectra Page.
Not a particularly elegant user interface, but it’s not something that will get a lot if use unless it is really needed.
Here a display of selected traces from a DSD GF file.
Possibly interesting for those who claim to understand the intricacies of vibrator control systems, but is likely to create all sorts of confusion for the rest of us.
Especially as any trace can be selected as the reference from which the phase difference is calculated, producing a totally different plot:
For diagnostic and research purposes it might be quite useful though, if interpreted carefully.
The latest user manual can be downloaded here:
http://www.seismatters.com/SMRefract/SMRefract%20User%20Ref.pdf