Numerical simulations based on previously validated models for the wide-angle airborne laser ranging system are used here for assessing the precision in coordinate estimates of ground-based cube-corner retroreflectors (CCR's). It is shown that the precision can be optimized to first order as a function of instrument performance, number of laser shots (LS's), and network size. Laser beam divergence, aircraft altitude, and CCR density are only second-order parameters, provided that the number of echoes per LS is greater than 20. Thus precision in the vertical is -1 mm with a signal-to-noise ratio of 50 at nadir, a lO-kin altitude, a 20° beam divergence, and ~5 x 10↑(3) measurements. Scintillation and fair-weather cumulus clouds usually have negligible influence on the estimates. Laser biases and path delay are compensated for by adjustment of aircraft offsets. The predominant atmospheric effect is with mesoscale nonuniform horizontal temperature gradients, which might lead to biases near 0.5 mm. #1999 Optical Society of America OCIS codes: 120.2830, 280.3400, 280.3640.
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机译：在此，使用基于先前验证的广角机载激光测距系统模型的数值模拟，以评估基于地面的立方角后向反射器（CCR）的坐标估计精度。结果表明，可以将精度最优化为一阶，具体取决于仪器性能，激光发射次数（LS）和网络大小。激光束发散，飞机高度和CCR密度仅是第二阶参数，条件是每个LS的回波数大于20。因此，垂直精度为-1 mm，信噪比为50，在天底，10 kin高度，20°光束发散度和〜5 x 10↑（3）测量值。闪烁和晴天积云通常对估计值的影响可忽略不计。激光偏移和路径延迟可通过调整飞机偏移来补偿。主要的大气影响是中尺度的不均匀水平温度梯度，这可能导致偏差接近0.5 mm。 ＃1999美国光学学会OCIS编码：120.2830、280.3400、280.3640。
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