Recorded a track using opentracker app for a 100km journey through the backroads. Phone was placed as far back on the pillion seat to get maximum view of the sky. No kalmann filter or anything.

The resulting track was very smooth, extremely few jaggies. One particular section of note is at the newly opened elevated highway that is probably at least 10 stories high. Due to the slanted imagery, the traced highway and the gps track differs by about 15 meters. Personally, I won’t bother realigning (although the temptation is very irresistible) - besides somebody else would probably moved it back according to imagery. I learned long ago that trying to get people to check imagery alignment with the provided cm level survey points before editing is a hopeless endeavor.

Still, I am pretty excited with the raw GNSS measurement ability of the phone and intend to set out more survey points just for the hell of it. Waiting for kind, knowledgable people to provide an appimage for the gnssanalysis software since I couldn’t get past installing matlab whatever in its current form.