Towards a Real-Time Description of the Ionosphere: A Comparison between International Reference Ionosphere (IRI) and IRI Real-Time Assimilative Mapping (IRTAM) Models
Towards a Real-Time Description of the Ionosphere: A Comparison between International Reference Ionosphere (IRI) and IRI Real-Time Assimilative Mapping (IRTAM) Models
复制标题
实现电离层的实时描述：国际参考电离层 (IRI) 和 IRI 实时同化测绘 (IRTAM) 模型之间的比较
DOI：
10.3390/atmos12081003
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发表时间：
2021
期刊：
影响因子：
2.9
通讯作者：
M. Pezzopane
中科院分区：
文献类型：
--
作者：
A. Pignalberi;M. Pietrella;M. Pezzopane
本文着重于一个详细的比较，基于F2层的峰值特征foF 2和hmF 2，国际参考电离层（IRI），这是一个气候学的经验模式的地面电离层，和IRI实时同化映射（IRTAM）的程序，这是一个实时版本的IRI的基础上同化从全球网络的电离层探测仪。为了进行这样的比较，考虑了两种不同类型的数据集：（1）2000年至2019年分布在世界各地的40个地基电离层探测仪记录的foF 2和hmF 2;（2）2006年至2018年记录的天基COSMIC/FORMOSAT-3无线电掩星测量的foF 2和hmF 2。本文的目的是了解IRTAM是否以及在多大程度上改善了不同地点和不同昼夜，季节，太阳和磁活动条件下的IRI foF 2和hmF 2输出。研究的主要结果是：（1）当电离层探测器观测被认为是验证，IRTAM显着提高了IRI foF 2建模的准确性和精度，而IRI hmF 2建模略有改善，观察到特定的位置和条件;（2）当COSMIC观测被认为是验证，从IRTAM方面没有观察到明显的改善foF 2和hmF 2。事实上，IRTAM可以改善IRI foF 2的描述，只有附近的同化电离层探测器的位置，而IRI hmF 2的描述总是更准确和精确比IRTAM之一。
This paper focuses on a detailed comparison, based on the F2-layer peak characteristics foF2 and hmF2, between the International Reference Ionosphere (IRI), which is a climatological empirical model of the terrestrial ionosphere, and the IRI Real-Time Assimilative Mapping (IRTAM) procedure, which is a real-time version of IRI based on data assimilation from a global network of ionosondes. To perform such a comparison, two different kinds of datasets have been considered: (1) foF2 and hmF2 as recorded by 40 ground-based ionosondes spread all over the world from 2000 to 2019; (2) foF2 and hmF2 from space-based COSMIC/FORMOSAT-3 radio occultation measurements recorded from 2006 to 2018. The aim of the paper is to understand whether and how much IRTAM improves IRI foF2 and hmF2 outputs for different locations and under different diurnal, seasonal, solar and magnetic activity conditions. The main outcomes of the study are: (1) when ionosonde observations are considered for validation, IRTAM significantly improves the IRI foF2 modeling both in accuracy and precision, while a slight improvement in the IRI hmF2 modeling is observed for specific locations and conditions; (2) when COSMIC observations are considered for validation, no noticeable improvement is observed from the IRTAM side for both foF2 and hmF2. Indeed, IRTAM can improve the IRI foF2 description only nearby the assimilated ionosonde locations, while the IRI hmF2 description is always more accurate and precise than IRTAM one.
地磁风暴期间电离层规范的验证：2013 年 3 月风暴事件期间的 TEC 和 foF2
影响因子：
3.7
作者：
Shim, J. S.;Tsagouri, I.;Goncharenko, L.;Rastaetter, L.;Kuznetsova, M.;Bilitza, D.;Codrescu, M.;Coster, A. J.;Solomon, S. C.;Fedrizzi, M.
通讯作者：
Fedrizzi, M.