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电离层具有明显的日变化规律,这就使我们能够依据这些规律预报出适合于电离层变化的工作频率。提前一天发布次日的最高可用频率在实际短波军事通信中具有重要价值,它在某些方面可以弥补长期预报和实时选频预报技术的不足。电离层参数随地磁纬度的变化具有更加相关的规律,我们可以利用电离层观测站实时提供的数据,采用七天加权平均法和内插法预报短波通信线路控制点处的电离层参量,从而预报出次日的最高可用频率MUF。借助于微机或可编程序计算器可使这种短期频率预报工作具有迅速,简便,经济,易行及便于部队推广的特点。本文根据有关的文献资料,简要地介绍这种方法的算法步骤,并在附录中给出了作者自编的两个BASIC程序。假定读者对一般的频率预报方法己有所了解,为节省篇幅,公式的推导均从略,有兴趣的读者可自行查阅给出的参考文献。
The ionosphere has a clear diurnal variation that allows us to predict the operating frequency suitable for ionospheric variations based on these laws. The highest available frequency of the next day’s release one day in advance is of great value in the actual short-wave military communications and can in some ways remedy the shortfall of long-term forecasting and real-time frequency-selective forecasting techniques. The ionospheric parameters have more regularity with the change of geomagnetic latitude. We can use the data provided by ionospheric stations in real time to predict the ionospheric parameters at the control points of shortwave communication lines by using seven-day weighted average method and interpolation method The next day the highest frequency MUF. This short-term frequency forecasting can be quickly and easily, economically, easily and easily promoted by the army by means of a microcomputer or a programmable calculator. Based on the relevant literature, this article briefly introduces the algorithm steps of this method, and gives the author in the appendix two BASIC programs. Assuming the reader has a general understanding of the frequency forecasting method, in order to save space, the derivation of the formula is omitted, interested readers are free to refer to the given reference.