Drones that can see through walls using only Wi-Fi
From the post:
A Wi-Fi transmitter and two drones. That’s all scientists need to create a 3D map of the interior of your house. Researchers at the University of California, Santa Barbara have successfully demonstrated how two drones working in tandem can ‘see through’ solid walls to create 3D model of the interiors of a building using only, and we kid you not, only Wi-Fi signals.
As astounding as it sounds, researchers Yasamin Mostofi and Chitra R. Karanam have devised this almost superhero-level X-ray vision technology. “This approach utilizes only Wi-Fi RSSI measurements, does not require any prior measurements in the area of interest and does not need objects to move to be imaged,” explains Mostofi, who teaches electrical and computer engineering at the University.
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For the paper and other details, see: 3D Through-Wall Imaging With Unmanned Aerial Vehicles and WiFi.
Before some contractor creates the Stingray equivalent for law enforcement, researchers and electronics buffs need to create new and improved versions for the public.
Government and industry offices are more complex than this demo but the technology will continue to improve.
I don’t have the technical ability to carry out the experiment but wondering if measurement of a strong signal from any source as it approaches a building and then its exit on the far side would serve the same purpose?
Reasoning that government/industry buildings may become shielded to some signals but in an age of smart phones, not all.
Enjoy!