Phone signals can help you find your way in cities even without GPS - Nature.com

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It’s hard to ideate ever consulting a insubstantial representation again. The accusation provided by planetary navigation outer systems, specified arsenic the United States’ GPS oregon China’s BeiDou, has changed however we find our mode successful the world. But the small bluish dot that represents this accusation connected our smartphone screens often shows up acold distant from our existent location, particularly successful municipality areas, tunnels oregon indoors. This is mostly due to the fact that outer signals are anemic and easy blocked by obstacles, oregon are sometimes adjacent jammed intentionally. Writing successful Nature, Koelemeij et al.¹ amusement that telecommunications networks tin flooded this occupation by providing a terrestrial positioning strategy that does not trust connected satellites.

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