Radar (acronym for Radio Detection and Ranging) uses radio waves to detect objects in the environment. It allows determining the distance (known as range), angular position (bearing), and velocity.

Emerging radar and signal processing technology is enabling Navy surface ships to achieve a ground-breaking measure of radar-detection range and precision--all while enabling ship defense systems to ...

Add Yahoo as a preferred source to see more of our stories on Google. The night one of the most feared Olympians ever fought a Japanese icon — was it real or fake? An investigation ...