Ionospheric electron density observed by FORMOSAT-3/COSMIC over the European region and validated by ionosonde data
Ionospheric electron density observed by FORMOSAT-3/COSMIC over the European region and validated by ionosonde data
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DOI：
10.1007/s00190-011-0481-z
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发表时间：
2011-05
影响因子：
4.4
通讯作者：
A. Krankowski;I. Zakharenkova;A. Krypiak-Gregorczyk;I. Shagimuratov;P. Wielgosz
中科院分区：
文献类型：
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作者：
A. Krankowski;I. Zakharenkova;A. Krypiak-Gregorczyk;I. Shagimuratov;P. Wielgosz
这项研究的动机是最近在英国纽卡斯尔举行的IGS 2010年研讨会上发布的IGS电离层工作组的建议。本建议鼓励开展研究，评估宇宙射电掩星剖面在国际地球物理系统全球电离层图(GIM)验证中的应用。这是因为GIM的可靠性对许多大地测量应用至关重要。另一方面，利用GPS信号进行无线电掩星已被证明是一种很有前途的技术，可以在全球范围内以高垂直分辨率反演电离层电子密度的精确剖面。然而，在常规使用这一强大的电离层探测技术之前，仍然需要进行系统的验证工作。本文分析了从宇宙射电掩星测量中反演的电离层电子密度剖面的特性。无线电掩星数据与地面测量的比较表明，无论是在F2层的峰值电子密度还是在剖面的底部，宇宙剖面通常都与电离层剖面很好地吻合。为了进行比较，使用了欧洲电离层观测站(DIAS网络)2008年记录的电离图。
This research is motivated by the recent IGS Ionosphere Working Group recommendation issued at the IGS 2010 Workshop held in Newcastle, UK. This recommendation encourages studies on the evaluation of the application of COSMIC radio occultation profiles for additional IGS global ionosphere map (GIM) validation. This is because the reliability of GIMs is crucial to many geodetic applications. On the other hand, radio occultation using GPS signals has been proven to be a promising technique to retrieve accurate profiles of the ionospheric electron density with high vertical resolution on a global scale. However, systematic validation work is still needed before using this powerful technique for sounding the ionosphere on a routine basis. In this paper, we analyze the properties of the ionospheric electron density profiling retrieved from COSMIC radio occultation measurements. A comparison of radio occultation data with ground-based measurements indicates that COSMIC profiles are usually in good agreement with ionosonde profiles, both in the F2 layer peak electron density and the bottom side of the profiles. For this comparison, ionograms recorded by European ionospheric stations (DIAS network) in 2008 were used.