长波天波传播几何参量的分析

The effect of atmospheric refraction on the calculation of skywave propagation geometry parameters

深入分析了在长波天波传播几何参量的确定和计算中 ,大气折射效应对其产生的影响 .澄清了以往有关工作中在定义天波传播路径距离方面存在的含糊不清的问题 ;首次在选取不同大气折射率分布模型的前提下 ,得到无线电视距、天波传播路径、出射角、入射角等长波天波传播几何参量的计算结果及其对天波传播时延和场强的影响 .研究结果表明 ,在确定天波传播几何参量和预测天波传播时延及场强时 ,不能忽视因选取大气折射率分布模型的不同而引入的误差 .

The effect of atmospheric refraction on geometry parameters of skywave propagation is analyzed. Some ambiguities about the definition of the skywave propagation path distance are clarified. For the first time, by choosing the three segment model of atmospheric refraction, the calculated result of skywave propagation geometry parameters, such as radio range of visibility, skywave propagation path, angle of incidence, angle of elevation, etc, as well as the effect on the skywave propagation time delay is obtained. The study shows that the error resulting from choosing a different atmospheric refraction model can not be ignored.