Heh, someone always tries to push the boundaries 
The /etc/sensorgnome/acquisitions.json file has a seconds between fixes value. That drives the rate at which the SG queries the GPS and if it gets a fix writes the coords into the data files. Be careful changing that and check that the resulting data files look the way you expect. (You need to systemctl restart sg-control after editing the file.)
I can’t speak to what the Motus back-end will do with all that info. I believe there is a way to mark a station as mobile…
Happy experimenting! But please do some testing before you head out and expect everything to just work…