The pitch of a blaring car horn rises as the vehicle approaches and falls as it moves away. That’s the Doppler effect, and it also occurs for electromagnetic radiation, enabling police to catch ...

The Doppler shift of sound or light waves from a moving source is familiar to physicists and non-physicists alike. Now, researchers in China and Australia have seen the more exotic inverse Doppler ...

The International Isle of Man TT is a crazy motorcycle race. I mean—it's seriously ludicrous. They ride on public roads (yes, they are closed to normal traffic) such that you get these videos of bikes ...

The integration of microwave photonics into sensor and radar systems has emerged as a transformative approach to achieve high-precision measurements of Doppler frequency shift (DFS) and ...

Perhaps you have heard there's a new radar in town: Klystron 13. The world's most powerful weather radar has found a home at Spectrum News 13, giving the Weather Experts the ability to cut through the ...

If you like fast cars, you may be all too familiar with the Doppler shift. It forms the basis of the police radar gun, which can work out your speed by measuring the shift in frequency of microwaves ...

Outside every National Weather Service (NWS) office around the U.S. stands what looks like an enormous white soccer ball, perched atop metal scaffolding several stories high. These somewhat plain ...

Doppler radar uses the Doppler effect to measure the radial velocity of targets in the antenna's directional beam. The Doppler effect shifts the received frequency up or down based on the radial ...

Radar systems are evolving rapidly, using improved technology to bring new benefits. A changeover to more digital components is enabling techniques such as beam forming, which improves surveillance ...