全球/短波传播熟悉使用较低的频率在超高频是未知的。
The global /shortwave/ propagation familiar to use of lower frequencies is unknown at UHF.
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。
Continous observations of the propagation delay variation of BPM standard time signal were carried out in real time at Wuhan Ionospheric Observatory by a digital display system.
光是一种能量形式——光在短波长方面以波形的形式传播。
Light is a form of energy - Light travels in waveform in short wavelengths.
提出了前兆应力波扩展与传播的最小阻力或最短波径定律以及地应力波传播的概略模型。
The law of least resistance or shortest path of spread of stress wave as well as general propagation model of stress wave are given.
从该电子密度模式和电离层波传播特性出发确定多径分量，计算短波信道相干带宽。
The coherence bandwidth of shortwave channel is calculated by using the density profile and wave propagation features in ionosphere.
短波通信由于其天波传播特性，在通信领域具有其它通信手段无法替代的地位。
High frequency (HF) communications play an important role in the field of their communications because of their skywave propagation characteristics.
分析近距短波无盲区通信的电波传播方式及性能，对指导工程实践具有重要的意义。
In the engineering applications of short-range HF no-blind zone communication, analyzing the propagation modes and characteristics of electromagnetic wave plays guidance role to engineering practice.
该短波扰动与风场的波动不相匹配，其位相传播特征与重力波相似。
The short wave disturbance did not match the undulation of the wind field, and the characteristics of its phase propagation were similar to those of gravity waves.
在对当前短波频率预测方法进行分析的基础上，提出了一种天波传播最大可用频率预测的改进方法。
Firstly, this paper presents an improved prediction method of maximum usable frequency (MUF) of skywave propagation based on the analysis of the current shortwave frequency prediction method.
无线通信系统按其传播信息的方式，可分为长波、中波、短波、超短波和微波通信方式。
From the mode of information transmission, the wireless communication can be classified as long wave, medium wave, shortwave, ultra short wave, and microwave.
因此短波通信的主要传播路径是天波。
The sky wave is the major transmitting way of short-wave communication.
短波天波传播频率预测是短波天波通信电路性能预测的前提。
The frequency prediction of skywave propagation in shortwave band is the precondition of performance prediction of skywave communication circuit.
短波天波传播频率预测是短波天波通信电路性能预测的前提。
The frequency prediction of skywave propagation in shortwave band is the precondition of performance prediction of skywave communication circuit.
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