由地形坡度引起的极化方位角偏移的估计

Estimation of the Polarization Orientation Angle Shifts Induced by Terrain Slopes

对于分布目标而言,雷达视角和地形坡度的变化会引起极化方位角的偏移,相反,在雷达视角一定的情况下,可以根据极化方位角的变化来估算地形变化。因此,针对由地形坡度引起的极化方位角的偏移,分析了多种极化方位角估计算法,并综合评价各类估计方法的优缺点,同时讨论了影响极化方位角估计精度的因素以及极化方位角信息的应用潜力。

As for a distribute target, the change of radar look angle and topographical slopes will arouse the polarization orientation angles shifts. On the contrary, when the radar look angle is known, topographical slopes can be estimated from the variance of the polarization orientation angle. Thus, in this paper, we review and summarize all kinds of estimation techniques proposed for the polarization orientation angles induced by terrain slopes so far, and evaluate the merit and deficiency of those methods. At the same time, besides the selection of algorithms, others factors that affect the accuracy of orientation angle estimations are discussed, and the current research and applications fields of orientation angles will also he presented.