Also possible use cases: Drones, Drone attacks on individuals with smartwatches, tracking of dissidents, these days you have to think about all possible angles.

> centimetre-level precision over four hours with a stationary setup

Ok, so does this really mean the smartwatch should not move for four hours?

Even with the stationary requirement, this is pretty neat.

One could imagine cheap turn-key devices that self locate and provide an accurate beacon for real time triangulation.

Is this just RTK? Which uses an extra stationary antenna and has been around for years. Or is there something new here?

The title is very misleading. The technique (RTK) depends on using a second receiver, not just a smartwatch on its own.

I imagine a system where several devices broadcast their coordinates to each other, and this way each device knows how far it is from a device and approximates its location based on the distance and coordinate of the other device, then matches it with its own GPS to narrow its coordinate even further.

Cheap positioning for construction projects.

How can this support the panopticon of public safety?

while researching links to back up me calling this a nothing burger, I found this: https://m.youtube.com/watch?v=twqqak3XVuY which upgrades this to Puff Piece.

it gets worse- the overseeing professor mentioned here, and in the video, is the author of the paper linked in the description- from 2018. (https://link.springer.com/article/10.1007/s00190-018-1192-5)

See: https://www.u-blox.com/en/technologies/high-precision-positi... for information thats not one guy stroking his... ego.

Also, PPP-RTK is another keyword.