在数字频高图换算电子浓度剖面的基础上，利用卡普曼函数拟合法建立模型电离层。
Based on the electron density profiles which were inverted from digital ionograms, a Chapman function is used to give a fitted model of ionosphere.
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.
根据电离层垂测图，利用POLAN程序反演获得电离层的实高剖面。
According to the vertical detection ionograms, use POLAN to calculate the real-height profile of the ionosphere.
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