Aerostat technology—based on aircraft that rely on buoyancy to stay aloft (think balloons or airships)—has proven effective for surveillance and reconnaissance from great heights. And now, RT LTA ...

A 444-kilogram wrecking ball was dropped from 45 meters to test just how tough bulletproof glass really is. Captured at 13,000 frames per second, the impact reveals a stunning slow-motion look at the ...

Abstract: Passive radar imaging has been extensively studied and is based on an illuminator-of-opportunity, such as a wireless access point, providing a signal that scatters from targets and is ...

Abstract: The atomic magnetometers operated in Earth-scale magnetic field are susceptible to the nonlinear Zeeman (NLZ) effect, resulting in multiple resonance peaks and heading error, which restricts ...

DroneScan3D attached to a drone, which is not included with the instrument. As more tower sites adopt drones for maintenance tasks, one amateur radio operator has designed a field strength instrument ...