Although widely used to model propagation in random media, radiative transfer theory is insufficient when waves propagating in different directions exhibit strong correlation and comprise an appreciable portion of the total field. For active sensing in unbounded media, the degradation in radiative transfer's accuracy is isolated to a narrow region near backscatter. It will be shown here that in a plane-stratified random medium, mechanisms not captured by radiative transfer are significant at all azimuthal angles, although confined in zenith. This finding is significant for a multitude of bistatic sensing applications. The enhancement is examined for both electromagnetic and acoustic waves using the Foldy-Lax and distorted Born approximations in conjunction with the two-variable perturbation method.

虽然广泛用于模拟随机介质中的传播，但当在不同方向传播的波表现出很强的相关性并占总场的相当大一部分时，辐射传递理论是不够的。对于无界介质中的主动传感，辐射传输精度的下降被隔离到反向散射附近的一个狭窄区域。这里将表明，在平面分层的随机介质中，辐射传输未捕获的机制在所有方位角上都很重要，尽管仅限于天顶。这一发现对于多种双基地传感应用具有重要意义。使用 Foldy-Lax 和扭曲的 Born 近似以及双变量微扰方法检查电磁波和声波的增强。