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The 74 pages that link to Radar, each with the reason it gives.

• Electromagnetic radiationRelated: Radar uses returned electromagnetic waves to estimate an object's range and motion.

• Battle of the AtlanticRelated: Shipborne and airborne radar helped Allied forces locate submarines, including at night.

• Vacuum tubeRelated: Specialized tubes generated and amplified the high-frequency power needed by early radar.

• Air traffic controlRelated: Surveillance radar lets controllers track aircraft positions and movement.

• KinematicsRelated: Repeated range and Doppler measurements reveal an object's motion.

• Signal detection theoryRelated: Wartime radar operators faced the practical problem of separating weak echoes from noise.

• Radio propagationRelated: Radar range and detection depend on signal propagation to a target and back.

• Signal processingRelated: Signal processing extracts target range, velocity, and direction from returning echoes.

• AzimuthRelated: Radar systems report a target's direction using azimuth alongside range and elevation.

• William ShockleyRelated: During World War II, Shockley worked on radar-related research and military operations analysis.

• Military aviationRelated: Airborne radar helps crews detect, track, and identify targets beyond visual range.

• Radio transmitterRelated: Radar transmitters send pulses or waveforms whose returning echoes reveal targets.

• ReflectionRelated: Radar infers targets from waves reflected back toward the transmitter.

• Fighter aircraftRelated: Airborne radar helps fighters find, track, and target aircraft at a distance.

• Vannevar BushRelated: Bush’s wartime research organizations coordinated major radar development programs.

• Radio waveRelated: The delay and direction of echoes reveal an object's distance and position.

• Active protection systemRelated: Radar can detect and track an approaching projectile before it reaches the vehicle.

• Air defenseRelated: Radar commonly detects and tracks airborne threats before visual contact.

• Cruise missileRelated: Low flight can limit radar line of sight and shorten the time available for detection.

• MicrowaveRelated: Many radar systems use microwave frequencies for directional beams and useful target resolution.

• Air-to-air missileRelated: Radar supplies target information and, for some guidance modes, illuminates the target.

• Manchester BabyRelated: Williams’s wartime radar research led to the storage techniques adapted for the Baby.

• Gulf of Tonkin incidentRelated: Erratic radar contacts contributed to the mistaken impression that attackers were approaching the destroyers.

• Voltage-controlled oscillatorRelated: VCOs generate swept-frequency signals used in frequency-modulated continuous-wave radar.

• AvionicsRelated: Aircraft use radar for weather detection, surveillance, and obstacle awareness.

• Multirole combat aircraftRelated: Airborne radar can support both target interception and the detection of ground targets.

• Proximity fuzeRelated: Radar principles provide a way to sense nearby targets.

• Interceptor aircraftRelated: Radar often provides the first detection that sends an interceptor toward a target.

• Battle of Cape EsperanceRelated: U.S. radar detected the approaching Japanese ships before visual contact.

• BearingRelated: Radar reports target direction as an angular bearing from the sensor.

• Military aircraftRelated: Airborne radar helps crews detect, track, and sometimes target objects at a distance.

• Spectral analysisRelated: Doppler spectra reveal motion and distinguish targets from clutter.

• Charles H. TownesRelated: Townes’s wartime radar work sharpened his interest in short-wavelength microwave sources.

• Edward Mills PurcellRelated: Radar engineering trained Purcell’s group to generate and detect the radiofrequency signals used in resonance experiments.

• Radian per secondRelated: Doppler and rotating-antenna calculations can use angular rates in radians per second.

• Radio-frequency engineeringRelated: Radar depends on RF transmitters, receivers, antennas, and frequency-control circuits.

• Cavity magnetronRelated: Cavity magnetrons made compact, high-power microwave transmitters practical for radar.

• History of radioRelated: Radar grew from radio engineering into a major military and civilian application.

• Man-portable air-defense systemRelated: Radar can cue operators to aircraft that are difficult to spot visually.

• Mary CartwrightRelated: Wartime radar research prompted Cartwright and Littlewood to investigate nonlinear oscillations.

• Strategic bomberRelated: Airborne radar supports navigation, target detection, and weapon delivery in poor visibility.

• Unidentified flying objectRelated: Radar can provide evidence beyond eyesight, but its returns can also be ambiguous.

• Electronic warfare aircraftRelated: Radar is a principal target of airborne detection, jamming, and deception.

• George PorterRelated: Porter adapted electronic timing expertise gained during wartime radar work for rapid chemical measurements.

• Heavy bomberRelated: Radar navigation and bombing equipment helped crews find targets in darkness and poor visibility.

• Whirlwind IRelated: Radar supplied the changing aircraft observations that real-time defense computers had to process.

• Air force modernizationRelated: Modern radar improves detection, tracking, and targeting across an air force.

• Detection theoryRelated: Radar uses detection rules to decide whether echoes indicate targets amid clutter and noise.

• K. Ferdinand BraunRelated: The cathode-ray tube became useful for displaying signals in later radar equipment.

• Mikoyan-Gurevich MiG-21Related: On later variants, onboard radar supported interception and missile employment.