...键词： 目标识别;翻滚 特征;观测角度;抽样点数 [gap=1058]Keywords：target recognition;rolling character;observation angle;number of sampling points ...
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zenith observation angle 观测天顶角
finite observation angle 有限观察角
horizontal angle observation 水平角测量
observation at low elevation angle 低仰角观测
multi-angle observation 多角度观察
vertical angle observation 垂直角观测
vertical angle observation error 垂直角观测误差
The radar cross section (RCS) of a target is dependent on frequency as well as observation angle.
目标的雷达散射截面（RCS）与照射频率和照射角有关。
The consciousness has offered the new observation Angle for studying the social state of Ming-Qing Dynasties.
这种救荒意识为研究明清社会状况提供了新的观察角度。
The utility model can automatically adjust the observation Angle of the automobile rearview mirror in the reversing process, thereby bringing great convenience to the driver.
本实用新型可在倒车过程中自动调整汽车后视镜的观察角度，给驾驶员带来很大方便。
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