As more and more drones fill the skies, increasingly sophisticated methods will be required to track them under increasingly challenging conditions. How will they navigate if they lose touch with the Global Positioning System? How will authorities know who to call if a drone goes wrong?
Two experiments illustrate how those questions are being addressed. One is being conducted by University of Washington researchers at the Columbia Gorge Regional Airport. The other is being done in cooperation with the Choctaw Nation in Oklahoma.
