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Operations Specialist (OS) A School Test 7 – Radar Operations Practice Test

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Most radars operate in which atmospheric layer?
Correct Answer:
Troposphere
Explanation:
Radars send radio waves that need to travel through the atmosphere to hit targets and return echoes. Most radar systems are built to observe targets in the layer closest to the ground—the troposphere—because that’s where weather phenomena, aircraft, birds, and ground clutter live, and where the propagation of common radar frequencies is best understood and most reliable. The ionosphere sits much higher and can reflect certain radio waves for special long-range applications, but it isn’t where the typical radar operates. The stratosphere and exosphere are well above the usual operating range of standard radars, which is why the troposphere is the common operating layer.

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