In high frequency region, the response of an extendedtarget is well approximated as the sum of responses from individual scattering centers.
在高频区，复杂目标的电磁散射表现为多散射中心相干迭加的结果。
2
The theoretical models of point target, extendedtarget and line target are established based on the concept of equivalent scattering area and laser ranging equation.
根据激光测距方程，引入了等效散射面积的概念，分别建立了对点目标、扩展目标和线形目标测距的理论模型。
3
The operating range for extendedtarget is calculated by considering of the target finding ability of eyes, contrast of target luminance, discrimination level and detection probability.