Knowra Radar Radar Radar detects and locates objects by transmitting radio waves and analyzing the signals reflected back. It can estimate distance, direction, speed, and sometimes an object's shape or movement.
Radio wave : An electromagnetic wave with a frequency lower than infrared light, used in communications, sensing, and broadcasting. Radar transmits radio waves and detects their reflections.
Electromagnetic spectrum : The full range of electromagnetic radiation, ordered by frequency or wavelength. Radar occupies the radio-frequency portion of this broader spectrum.
Weather radar : A radar system that detects precipitation and estimates its location, intensity, and motion. It uses reflected radio waves to track storms and measure precipitation.
Lidar : A remote-sensing method that measures distance using reflected laser light. Unlike radar, it uses optical wavelengths and can provide finer spatial detail in clear conditions.
Radar equation : An equation relating received radar power to transmitted power, antenna gains, wavelength, target reflectivity, and range. It predicts how target distance and reflectivity affect the strength of a radar echo.
Antenna : A device that transmits or receives electromagnetic waves. Radar antennas launch radio waves and collect returning echoes.
Synthetic-aperture radar : A radar imaging technique that combines measurements from a moving platform to create a high-resolution image. It produces detailed images of terrain from aircraft and satellites, even through clouds.
Sonar : A system that detects objects using sound waves transmitted through water or air. Sonar uses acoustic echoes where radio waves are poorly suited, especially underwater.
Radar cross-section : A measure of how detectable an object is by radar, based on the power it reflects toward the receiver. It explains why objects of similar size can produce very different echoes.
Reflection (physics) : The return of a wave from a boundary between materials or from a scattering object. Radar depends on radio energy scattering back from objects.
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