A correction for the IRI topside electron density model based on Alouette/ISIS topside sounder data
A correction for the IRI topside electron density model based on Alouette/ISIS topside sounder data
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DOI：
10.1016/j.asr.2003.07.009
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发表时间：
2004-01-01
期刊：
影响因子：
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通讯作者：
Bilitza, D
中科院分区：
文献类型：
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作者：
Bilitza, D
国际参考电离层 (IRI) 电子密度模型（以及 Bent 模型）的上部部分基于当时可用的有限数量的上部数据（类似于 40,000 个 Alouette 1. 剖面）。由于是根据如此小的数据库建立的，因此这些模型具有众所周知的缺点（例如在太阳活动较高时）也就不足为奇了。与此同时，包含来自 Alouette 1、2 和 ISIS 1、2 的近 200,000 个上部剖面的大型数据库已在线提供。大量数字化电离图的自动缩放和反演程序不断地添加到该数据池中。我们使用当前可用的 ISIS/Alouette 上部剖面来评估 IRI 上部模型并研究改进模型的方法。 IRI 模型在中纬度地区总体表现良好，但在低纬度和高纬度地区表现出差异，并且这些差异在太阳活动频繁期间最大。在上部顶面，IRI 始终高估测量值。根据数据模型比率的平均值，我们建立了 IRI 模型的校正因子。这些因素随海拔高度、修正倾角纬度和当地时间的变化而变化。 (C) 2003 年国际空间研究委员会。由爱思唯尔有限公司出版。保留所有权利。
The topside segment of the International Reference Ionosphere (IRI) electron density model (and also of the Bent model) is based on the limited amount of topside data available at the time (similar to40,000 Alouette 1. profiles). Being established from such a small database it is therefore not surprising that these models have well-known shortcomings, for example, at high solar activities. Meanwhile a large data base of close to 200,000 topside profiles from Alouette 1, 2, and ISIS 1, 2 has become available online. A program of automated scaling and inversion of a large volume of digitized ionograms adds continuously to this data pool. We have used the currently available ISIS/Alouette topside profiles to evaluate the IRI topside model and to investigate ways of improving the model. The IRI model performs generally well at middle latitudes and shows discrepancies at low and high latitudes and these discrepancies are largest during high solar activity. In the upper topside IRI consistently overestimates the measurements. Based on averages of the data-model ratios we have established correction factors for the IRI model. These factors vary with altitude, modified dip latitude, and local time. (C) 2003 COSPAR. Published by Elsevier Ltd. All rights reserved.