Ultrasound travels at the speed of sound which is 330 m/s in air ... A pulse of radar is reflected by the storm and returns to the receiver after 3 ms. Time for the radio waves to travel to ...

Researchers in China have developed a radar that sits on the seabed and can detect and track aircraft flying high above.

The technology is far from operational. While similar sensors have proven reliable in detecting low-flying aircraft over shallow waters, the challenge could be far greater in the open sea.

The Nero-M is a multi-band radar detection system that Russia claims can detect the West’s stealth jets, so how does it do it ...

China's 'deep-sea radar' could potentially shift its submarines from being targets to becoming hunters in anti-submarine ...

The now-in-development radar could change that, allowing the boat to detect the sound waves generated by an aircraft. While most of the waves generated by an aircraft are reflected away and back ...

The South Korean government said Thursday it would deploy thermal imaging cameras and bird detection radar systems at all ...

Chinese researchers have allegedly developed a new kind of acoustic sensor array that could help protect submarines from ...