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根据电离层参数随地磁纬度变化的相关规律,利用电离层观测站的实时观测资料,采用七天加权均值法预报出给定电路控制点处的电离层参量,继而用内插、外推以及准实时预测图方法预报出次日该电路的最高可用频率。这种提前一天向用户发布的准实时频率预报技术在某些方面可以弥补长期频率预报方法和实时选频技术的不足,该技术在短波通信中具有较高的实用阶值,具有经济、简便、易行、便于广泛推广使用的优点。
According to the correlation law of ionospheric parameters with the change of geomagnetic latitude, the ionospheric parameters at the control points of a given circuit are predicted by real-time observational data of ionospheric observation stations using seven-day weighted average method, and then interpolation, extrapolation and quasi-real-time The forecast map method predicts the highest available frequency of the circuit the next day. This kind of quasi-real-time frequency forecasting technology released to users one day in advance can make up for some shortages of long-term frequency forecasting methods and real-time frequency selection techniques. The technology has higher practical order values in shortwave communications and has the advantages of economy, simplicity, Easy, easy to widely promote the use of advantages.