Aún no tenemos significados para "urban canyons".
1Soldiers are more easily ambushed in urban canyons and inside buildings.
2The Pentagon's brains would like to see swarms of tiny drones zipping through urban canyons, looking for enemies.
3And that means more than just next-generation sensors that can penetrate foliage or peer inside " urban canyons."
4This is especially true because the systems will also have to function perfectly in urban canyons and in inclement weather.
5A three-signal world will mean always-on GPS that's accurate to within 3 feet, even indoors and in concrete urban canyons.
6Urban canyons formed between tall buildings, trapping heat at the street level.
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