The presence and importance of small drones (unmanned aerial vehicles) are increasing. With traditional radar detection the target radar cross section and its statistical properties are needed in order to design the detector and to assess detection performance. The authors make a statistical analysis of the radar cross section of two small fixed-wing drones using measured data from typical flights. Using data from a typical flight instead of measurements or electromagnetic calculations as a function of aspect angle is a convenient method. Work results of the authors in mean values, medians and standard deviations, in analyses of common target probability distributions and in decorrelation times for the radar cross section, are necessary for design and assessment of the detection performance. The authors suggest a new target probability distribution which agrees better with the measured data than the others tested. The authors also note significant differences between the drones.

中文翻译：

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两架小型固定翼无人机典型飞行雷达截面统计分析

小型无人机（无人驾驶飞行器）的存在和重要性正在增加。对于传统的雷达探测，需要目标雷达截面及其统计特性，以便设计探测器并评估探测性能。作者利用典型飞行的测量数据对两架小型固定翼无人机的雷达截面进行了统计分析。使用来自典型飞行的数据而不是测量或电磁计算作为方位角的函数是一种方便的方法。作者在平均值、中值和标准差、常见目标概率分布分析以及雷达截面去相关时间方面的工作成果对于设计和评估检测性能是必要的。作者提出了一种新的目标概率分布，它比其他测试的数据更符合测量数据。作者还注意到无人机之间的显着差异。