异常传播条件对低频信号的影响

Effect of the Abnormal Propagation Conditions on the LF Signals

根据低频夭波实测资料和实验结果的分析表明:引起低频夭波信号的幅度与相位产生突然异常的原因,与太阳地球物理现象有关。而在高精度的授时结果中,必须考虑到异常传播条件对低频天波信号的影响。

It is shown from the analyses of the observed data of LF skywaves and the experimental results that the reason why the amplitude and phase of the LF skywaves become suddenly abnormal is related to the solar-geophysical phenomenon.Therefore,the effect of the abnormal propagation conditions on the LF skywaves should be taken into account in the highly accurate results of the time service.