Assertion: radar's power | /r/CapableOf | impinge on a surface of 1m^2
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Source sentences:
text: A target having 1m^2 cross-section reflects toward the radar a power equivalent to all the power impinging on a surface of 1m^2 radiated isotropically (the physical area of the target may be smaller than its cross-section if it re-radiates preferentially toward the radar).