4cm accuracy is almost enough for precision agriculture. You usually want a year-over-year positioning accuracy of better than 2.5cm for your combine harvesters

4cm accuracy is almost enough for precision agriculture. You usually want a year-over-year positioning accuracy of better than 2.5cm for your combine harvesters to mange issues of soil compactification. This is about the same order of magnitude as continental drift speeds, which can be up to 10cm/year. The usual solution to this is to use a correction signal generated by a nearby reference station with a well known position that can be distributed over the internet: https://en.wikipedia.org/wiki/Real-time_kinematic https://en.wikipedia.org/wiki/Real-time_kinematic Compared with this, the new approach you describe may have the disadvantage (at least for applications that care about positions relative to the surface and not the core of the earth) that it does not use a reference station that is fixed to the continental plate it is on (so that continental drift cancels out implicitly), and users have to handle it explicitly. Or do they offer a drift corrected service?