[thamer]

> I think < 10 cm accuracy is achievable

If you don't know how precise GPS receivers can get with dead reckoning techniques, this demo of someone "drawing" onto a map of their driveway using a GPS receiver is very impressive: https://youtu.be/3tQjIHFcJVg?t=245

It looks like they're getting measurements that are only a few inches away of the module's real position, although of course the conditions seem favorable with an unobstructed sky and consistent alignment.

The module they use is a ZED-F9P by u-blox. I've used ~$50 u-blox GPS modules in DIY electronic projects before since they're often the brand you'll get when buying GPS modules, but this particular type with dead reckoning is much more expensive. Sparkfun has it for $275 for example: https://www.sparkfun.com/products/16481.

[simgt]

I believe this is demonstrating the performance improvement of RTK [0] alone, not dead reckoning. GPS + dead reckoning is what phones and wearable do afaik, whereas RTK requires getting correction data associated to base stations nearby and seems mostly relevant for industrial applications (you need a subscription in the case of u-blox).

[0] https://en.wikipedia.org/wiki/Real-time_kinematic_positionin...