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由后向散射电离图的前沿——最小群路径确定地面距离,是短波超视距雷达和其他应用中需要解决的重要问题。作者根据他本人所导出的最小群路径射线仰角与工作频率以及电离层参数的关系,找出了一种在后向散射电离图中以已知地物描迹作参考确定未知地物地面距离的方法。该法适应于零距离到远距离的广大范围,定地面距离的误差小于2公里;而且该法对最小群路径的测量误差不敏感。
Determining the ground distance from the leading edge of the backscattered ionogram - the smallest group path is an important issue that needs to be addressed in short-wave OTHR and other applications. Based on his own derived minimum angle of elevation of the group of paths and the working frequency and ionospheric parameters of the relationship between a backscattered ionization map to find a trace of known features as a reference to determine the unknown terrestrial distance method. The method adapts to a wide range of zero distance to long distance, and the error of the fixed ground distance is less than 2 km. Moreover, this method is insensitive to the measurement error of the smallest group of paths.