light echo是什么意思

用法例句

Starting from the range equations of EODM , this paper discusses the following problems: the ef-fecf of the atmospheric decrement upon the EODM return light intensity; the statistics of linear analysis for the relation between EODM precision and the return light signals ; presentation of new precision ex-pression for the experimental instruments by experimental data statistics.

本文从光电测距的测程方程式出发讨论:大气衰减对测距回光强度的影响;线性分析统计测距精度与回光信号的关系;通过实验数据统计给出实验仪器新的精度表达式。