McKay J A
Appl Opt. 1998 Sep 20;37(27):6487-93. doi: 10.1364/ao.37.006487.
A simple analytic model is developed for the shot-noise-limited measurement precision of Doppler wind lidars based on the fringe imaging technique by use of either molecular or aerosol atmospheric backscatter. The model leads to etalon design parameters for an instrument optimized for precision. The ultimate measurement precision possible is two to four times the limit for a perfect, lossless receiver. The corresponding result for the double-edge Doppler analyzer was a ratio of 2.5, showing that the two methods are little different in this respect. For aerosol backscatter instruments, the wind speed dynamic range of the fringe imager is substantially greater than that for the edge detector. The etalon aperture needed to meet system etendue requirements is derived and shown to be approximately half that of each of the two etalons required by the double-edge technique. A comparison with more detailed modeling of fringe imaging Doppler-shift analyzers shows good agreement for the Rayleigh model and fair for the aerosol version, confirming the validity of this simpler technique for analyzer design and performance prediction.
基于条纹成像技术，利用分子或气溶胶大气后向散射，为多普勒测风激光雷达的散粒噪声限制测量精度建立了一个简单的分析模型。该模型得出了针对精度进行优化的仪器的标准具设计参数。可能达到的最终测量精度是理想无损接收器极限的两到四倍。双边多普勒分析仪的相应结果是2.5倍的比率，表明这两种方法在这方面差异不大。对于气溶胶后向散射仪器，条纹成像仪的风速动态范围远大于边缘探测器的风速动态范围。推导了满足系统 étendue 要求所需的标准具孔径，并表明其约为双边技术所需的两个标准具中每个标准具孔径的一半。与条纹成像多普勒频移分析仪更详细的建模结果进行比较，结果表明对于瑞利模型两者吻合良好，对于气溶胶模型吻合程度尚可，证实了这种更简单的技术在分析仪设计和性能预测方面的有效性。
