【摘要】 本文通过对短波时号电离层传播的长期观测研究，详细分析了时号经由电离层传播时出现的各种现象及对其短波定时性能的影响。理论研究和实验均表明：采取有效方法克服电离层电波传播因素的影响，现有短波定时的精度及性能有可能进一步提高。更多还原

【Abstract】 In this paper, some ionospheric propagation phenorncna of HF time signal are discussed based on along period observation. Their effects on the accuracy of HF timing precision are studied It is shown that the HFtiming performance would be improved if these effects are removed effectively. A new method for HF time-signalreception has been put forward. Some measurments show that this method enables users to obtain a timing accuracyof 1 ms automatically in real-time.更多还原