论文部分内容阅读
利用新研制的短波传播时延实时数字显示系统,在武汉电离层观象台对BPM时号的传播时延进行了长时间连续观测。发现这种时延曲线的主要特征是:它是分段光滑的,光滑段工的相对时间比对精度可优于0.1ms;各光滑段之间,时延值发生突跳。结合多普勒图和频高图的同时观测记录,解释了时延突跳的原因,着重说明了突跳好几毫秒的所谓异常时号的传播机制。此外,还讨论了提高短波授时精度的某些技术措施。
Using the newly developed shortwave propagation time delay real-time digital display system, the propagation delay of BPM Horizons was observed continuously for a long time at Wuhan Ionospheric Observatory. It is found that the main characteristic of this kind of time-delay curve is that it is segmented and smooth, and the precision of the relative time alignment of the smoothing section workers can be better than 0.1ms; the sudden delay of the time delay values between the smoothing sections. Combined with the simultaneous observation and recording of Doppler plots and frequency-height plots, the reasons for the delay jitters are explained, highlighting the propagation mechanism of so-called anomaly signals that burst for several milliseconds. In addition, some technical measures to improve the accuracy of short-wave timing are also discussed.