Long-term comparison of the ionospheric F2 layer electron density peak derived from ionosonde data and Formosat-3/COSMIC occultations
Long-term comparison of the ionospheric F2 layer electron density peak derived from ionosonde data and Formosat-3/COSMIC occultations
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电离探空仪数据与Formosat-3/COSMIC掩星电离层F2层电子密度峰值的长期比较
DOI：
10.1051/swsc/2015023
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发表时间：
2015
影响因子：
3.3
通讯作者：
Dettmering
中科院分区：
文献类型：
--
作者：
Limberger;Hernández-Pajares;Aragón-Ángel;Altadill;Dettmering
由全球导航卫星系统无线电掩星测量得到的电子密度分布提供了关于电离层垂直电子密度结构的宝贵信息，除其他外，可用于提取关键参数，例如最大电子密度和F2层的最大电子密度NmF2和相应的峰值高度mF2。在这项工作中，应用了UPC(西班牙巴塞罗那)开发的一种有效的电子密度反演方法，以评估根据2006年至2014年期间超过半个太阳周期的FORMOSAT-3/COSMIC(F-3/C)无线电掩星测量确定的NmF2和hmF2的准确性。空间物理交互数据资源(SPIDR)网络的电离层探空测量可作为参考。对全球趋势进行了研究，并对掩星和电离层测量得到的F2层电子密度峰进行了比较。这些研究是在全球范围内进行的，磁赤道周围的不同纬度扇区[[0°，20°]，±]20°，60°]和±]60°，90°])和当地时间(LT)考虑了夜间(02：00LT±0.2小时)、黎明(08：00 LT±0.2小时)和白天(14：00 LT±0.2小时)的不同电离层条件。F-3/C和电离层探测仪观测到的F2层电子密度峰的平均差异不显著。峰差的相对变化范围为NmF2为22%-30%，HmF2为10%-15%。在白天和黎明，赤道和中纬度地区观测的一致性一般很高，而极地地区和夜间则发现了退化现象。结果表明，由F-3/C掩星得到的NmF2和hmF2的全球平均值是反映太阳活动的良好指标。
Electron density profiles (EDPs) derived from GNSS radio occultation (RO) measurements provide valuable information on the vertical electron density structure of the ionosphere and, among others, allow the extraction of key parameters such as the maximum electron densityNmF2 and the corresponding peak heighthmF2 of the F2 layer. An efficient electron density retrieval method, developed at the UPC (Barcelona, Spain), has been applied in this work to assess the accuracy ofNmF2andhmF2 as determined from Formosat-3/COSMIC (F-3/C) radio occultation measurements for a period of more than half a solar cycle between 2006 and 2014. Ionosonde measurements of the Space Physics Interactive Data Resource (SPIDR) network serve as a reference. Investigations on the global trend as well as comparisons of the F2 layer electron density peaks derived from both occultations and ionosonde measurements are carried out. The studies are performed in the global domain and with the distinction of different latitude sectors around the magnetic equator ±[0°, 20°], ±]20°, 60°] and ±]60°, 90°]) and local times (LT) accounting for different ionospheric conditions at night (02:00 LT ± 2 h), dawn (08:00 LT ± 2 h), and day (14:00 LT ± 2 h).The mean differences of F2 layer electron density peaks observed by F-3/C and ionosondes are found to be insignificant. Relative variations of the peak differences are determined in the range of 22%–30% forNmF2 and 10%–15% forhmF2. The consistency of observations is generally high for the equatorial and mid-latitude sectors at daytime and dawn whereas degradations have been detected in the polar regions and during night. It is shown, that the global averages ofNmF2 andhmF2 derived from F-3/C occultations appear as excellent indicators for the solar activity.
对电离层电子密度反演的贡献
DOI：
--
发表时间：
2010
期刊：
影响因子：
--
作者：
A. A. Àngel
通讯作者：
A. A. Àngel