Wait公式与Millington经验公式预测地波时延的比较

Comparison between Wait formula and Millington empirical formula for predicting ground-wave delay

为了了解用于预测沿光滑分段均匀混合路径传播的地波时延的Millington经验公式的实用性,对Millington经验公式和用于预测沿光滑分段均匀混合路径传播的地波时延的严格的Wait公式进行了比较。在Wait积分法用计算机软件实现的基础上,用上述2种方法分别计算多条实际路径的地波二次相位因子,并对计算结果进行了比较。比较结果表明,在实际工程应用中用Millington经验公式进行地波时延预测符合应用要求。

For learning the practicality of Millington empirical formula in predicting the time delay of ground-wave propagating along piecewise smooth mixed path, the Millington empirical formula is compared with the strict Wait integral method. On the basis that the Wait integral method is realized with computer software, the secondary phase factors for the ground-waves propagating along several paths are calculated with the Millington empirical formula and the Wait integral method respectively. The calculations are compared and the results show that the Millington empirical formula can meet the requirements of practical engineering in ground-wave delay prediction.