受地球上空约55~1000公里弱等离子体区域制约的无线电波传播,包括在这个区域内和透过这个区域的电波传播。电离层是冷的弱等离子体,呈电中性。电离层处在地磁场中,电子运动时因受地磁场的洛伦茨力作用而围绕磁力线旋转,旋转频率称为磁旋频率,其大小可以与短波频率相比。
斜向探测是电离层探测的主要方式之一,它能够获得电波传播群时延和频率关系的电离图。
The oblique sounding is one of the powerful tools, by which an oblique ionogram is obtained with the group path or time delay against operating frequency.
由于课题研究的对象是电离层中传播的电波,所以了解电离层对其间传播的电波的影响是很必要的。
Since the subject of the thesis is about the wave in the ionosphere, it might be essential to perceive and comprehend how the ionosphere influences the wave.
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