Radar technology for the longest time struggled with ground clutter, and to an extent, still does, so how do radio waves, which struggle with trees and bushes, penetrate into the ground and how does it get a return?
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GPR usually is performed right above the ground, so there’s no interference from trees. They struggle with air. Nowadays it’s usually a little cart or something mounted onto a vehicle. The radar emitter will be a few inches above the ground.
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