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首页> 外文期刊>Geoscience and Remote Sensing Letters, IEEE >Performance Metrics for Single-Photon Laser Ranging
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Performance Metrics for Single-Photon Laser Ranging

机译：单光子激光测距的性能指标

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摘要

Airborne laser swath mapping systems collect thousands of range measurements per second, enabling high-resolution surface mapping. Low-signal-to-noise-ratio (LSNR) detection techniques allow for implementation of light detection and range (LIDAR) instrumentation aboard platforms with stringent power, size, and weight restrictions. The University of Florida has developed the coastal area tactical-mapping system, which is a prototype LSNR LIDAR system that is capable of single-photon laser ranging. Laser pulses of 532 nm, 3.5 ¿J, and 480 ps are transmitted at 8 kHz, with the outgoing footprint split into a 10 × 10 array of elements. Backscattered photons are imaged back onto separate anodes of a multistop microchannel plate photomultiplier tube. A 2-GHz event timer processes returns over the array. Ranges for known targets are accumulated for repeated laser shots, and statistical analysis is applied to evaluate performance metrics that are related to minimum separation distance, bathymetric mapping depth, and atmospheric scattering. An LSNR detection paradigm based on Poisson statistics has enabled topographic target detection and shallow-water bathymetry. Quantitative results are used to draw conclusions about feature detection in topographic and bathymetric mapping scenarios.
机译：机载激光测绘测绘系统每秒收集数千个距离测量值，从而实现高分辨率的表面测绘。低信噪比（LSNR）检测技术可在功率，尺寸和重量受到严格限制的平台上实现光检测和测距（LIDAR）仪器。佛罗里达大学已经开发了沿海战术映射系统，该系统是原型LSNR LIDAR系统，能够进行单光子激光测距。 532 nm，3.5×J和480 ps的激光脉冲以8 kHz的频率传输，将输出足迹分成10×10的元素阵列。反向散射的光子被成像回到多级微通道板光电倍增管的单独阳极上。 2 GHz事件计时器处理通过阵列返回的事件。累积已知目标的范围以进行重复的激光射击，并进行统计分析以评估与最小间隔距离，测深图深度和大气散射有关的性能指标。基于泊松统计的LSNR检测范例已实现了地形目标检测和浅水测深。定量结果用于得出有关地形和测深图方案中特征检测的结论。

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