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.
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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