Radar and Air Defense

What radars and sensors measure and why air defense comes in layers, from official sources.

Radar and Air DefenseOctober 13, 2026Radar: measuring distance and motion with radio wavesHow radar finds distance from the round-trip time of radio waves and motion from the Doppler effect, how it finds direction and height, how weather services and air traffic control use it, and where the name RADAR came from, based on public sources.

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