Also possible use cases: Drones, Drone attacks on individuals with smartwatches, tracking of dissidents, these days you have to think about all possible angles.
I expect starlink to eat that industry shortly. Not sure how they'll make the strategic steps though. Mandatory location data for cell phones to talk with star-link? Wait for whatever satellite septentrio uses to EOL and offer a deal to use star-link instead?
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.
Just one more piece of the behavior recognition and total sensor fusion puzzle. This can also be used to train passive RF based sensing techniques to be more accurate.
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