Modification of the IRI Electron Density Profile from an Observation Ionogram using the Full Wave Method in the Lower Ionosphere
Modification of the IRI Electron Density Profile from an Observation Ionogram using the Full Wave Method in the Lower Ionosphere
复制标题
使用低电离层中的全波方法根据观测电离图修改 IRI 电子密度剖面
DOI：
10.1109/piers-spring46901.2019.9017241
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
深見哲男，長野勇，東亮一
中科院分区：
文献类型：
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作者：
Fukami Tetsuo;Higashi Ryoichi;Nagano Isamu;深見哲男，東亮一;深見哲男，長野勇，東亮一
由于国际参考电离层（IRI）非常有用，因此必须经常检查IRI剖面与实际剖面之间的差异。对于电子密度分布图来说，电离层图是了解电离层下层实际情况的有效资料。虽然电离图中包含了大量视高度和反射系数对观测频率的影响信息，但目前电离图信息中只使用了foE和foF2等特殊数据。我们提出了一种通过全波计算同时从电子密度分布和碰撞频率分布估计延迟时间的方法。本文以一个实例，研究了实测离子图与IRI理论离子图的区别。并对IRI电子密度谱进行了修正，使计算的离子图与实测的离子图吻合。
As the International Reference Ionosphere (IRI) is very useful, the difference between the IRI profile and the actual profile must be checked constantly. For the electron density profile, ionograms are effective data to know the actual lower ionospheric conditions. Now, only special data such as foE and foF2 are used in the ionogram information, though the ionograms have much information of both apparent heights and reflection coefficients on observation frequencies. We suggest a method that estimate the delay time from both the electron density profile and the collision frequency profile by the full wave calculation. In this paper, we investigate difference between the measured ionogram and the IRI theoretical ionogram for one example. And we modify the IRI electron density profile so that the calculated ionogram fit to the measured ionogram.