More antennas means more comprehensive coverage ... switch between city and highway mode based on location and speed. Police radar guns with instant-on capability send a rapid signal burst ...

The ever increasing speed of aircraft and ordnance after the second world war pushed the requirement for antenna sweep time from seconds to milliseconds. The first full-scale phased array radar ...

A tilt angle of 0.5° means that the radar's antenna is tilted 0.5° above the ... because of wind shear--a sudden change in wind speed and direction. Wind shear is common in thunderstorms ...

What is a high-frequency radar? High-frequency or HF radar ... waves on the lake/ocean and bounces back to the antenna. By measuring the characteristics of the returning pulse we can map the speed and ...

Mean Doppler velocity (radial velocity along each active antenna beam corrected for aircraft motion) 3-dimensional spatial reference (radar platform location and speed, and beam pointing directions ...

Chinese scientists have made a breakthrough in submarine detection by creating a radio-emitting source in the sky using high-energy microwave synthesis technology. This virtual signal source, which ...