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首页> 外文会议>Conference on long-rance imaging >Low-CNR inverse synthetic aperture LADAR imaging demonstration with atmospheric turbulence
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Low-CNR inverse synthetic aperture LADAR imaging demonstration with atmospheric turbulence

机译：低CNR逆合成孔径Ladar成像演示与大气湍流

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An Inverse Synthetic Aperture LADAR (ISAL) system is capable of providing high resolution surface mapping of near Earth objects which is an ability that has gained significant interest for both exploration and hazard assessment. The use of an ISAL system over these long distances often presents the need to operate the optical system in photon-starved conditions. This leads to a necessity to understand the implications of photon and detector noise in the system. Here a Carrier-to-Noise Ratio is derived which is similar to other optical imaging CNR definitions. The CNR value is compared to the quality of experimentally captured images recovered using the Phase Gradient Autofocus technique both with and without the presence of atmospheric turbulence. A minimum return signal CNR for the PGA to work is observed.
机译：逆合成孔径LADAR（ISAL）系统能够提供近地球对象的高分辨率表面映射，这是对勘探和危害评估产生重大兴趣的能力。在这些长距离上使用ISAL系统通常呈现需要在光子匮乏的条件下操作光学系统。这导致了了解系统中光子和检测器噪声的影响。这里导出载波信噪比，其类似于其他光学成像CNR定义。将CNR值与使用相位梯度自动对焦技术一起恢复的实验捕获图像的质量进行比较，并且在没有大气湍流的情况下使用相位梯度自瓶孔技术。观察到PGA的最小返回信号CNR。

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