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目标对电磁波能量的反射强度与目标本身的特性有关,这种反射特性我们常用有效散射面积σ来描写: σ=P_r/Q_Σ(m~2) P_r—目标二次辐射的能量(W); Q_Σ—目标附近的探测能量密度(W/m~2)。二次辐射的能量传播到接收机附近的能量密度为:
The reflection intensity of the target on the electromagnetic wave energy is related to the characteristics of the target itself. This reflection characteristic is usually described by the effective scattering area σ: σ = P_r / Q_Σ (m ~ 2) P_r- energy of target secondary radiation (W); Q_Σ - Probing energy density near the target (W / m ~ 2). The energy density of the secondary radiation propagating to the vicinity of the receiver is: