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Drift Velocity Estimation of Ionospheric Bubbles Using GNSS Observations
Radio Science ( IF 1.6 ) Pub Date : 2021-07-20 , DOI: 10.1029/2020rs007220
Ana L. C. Souza 1 , Paulo O. Camargo 1 , Marcio T. A. H. Muella 2 , Flavia Tardelli‐Coelho 2
Affiliation  

Equatorial plasma bubble (EPB) irregularities are large-scale plasma depleted structures that exist in the equatorial and low-latitude ionosphere. Thus, particularly in these regions, much attention must be given to the effects of the EPBs in the life critical applications based on global navigation satellite systems (GNSS). The study on the dynamics of plasma bubbles, particularly in the determination of their drift velocities, and their impact on ground-based augmentation system is of fundamental importance for civilian aviation. In this regard, we proposed a methodology to estimate the zonal drift velocities of the plasma bubble irregularities using slant total electron content (TEC) measurements derived from two spaced ground-based GNSS receivers. The experiments were performed with the purpose to evaluate if the drift velocities obtained using the methodology proposed in this study agree with the velocities deduced from all-sky imaging systems. The results revealed that the TEC-estimated mean eastward drift velocities were comparable with the values deduced from the airglow techniques, and with the results obtained from previous studies. Therefore, the methodology proposed in this work to infer the plasma bubble drift velocities seem to have the potential in future investigations to provide a new data source in this field.

中文翻译:

使用 GNSS 观测估计电离层气泡的漂移速度

赤道等离子体气泡 (EPB) 不规则性是存在于赤道和低纬度电离层中的大规模等离子体耗尽结构。因此,特别是在这些地区,必须高度重视 EPB 在基于全球导航卫星系统 (GNSS) 的生命关键应用中的影响。研究等离子体气泡的动力学,特别是确定其漂移速度及其对地基增强系统的影响,对于民用航空具有根本重要性。在这方面,我们提出了一种方法来估计等离子体气泡不规则性的纬向漂移速度,该方法使用来自两个间隔开的地面 GNSS 接收器的倾斜总电子含量 (TEC) 测量值。进行实验的目的是评估使用本研究中提出的方法获得的漂移速度是否与从全天空成像系统推导出的速度一致。结果表明,TEC 估计的平均向东漂移速度与从气辉技术推导出的值以及从以前的研究中获得的结果相当。因此,这项工作中提出的用于推断等离子体气泡漂移速度的方法似乎有可能在未来的研究中为该领域提供新的数据源。以及从以前的研究中获得的结果。因此,这项工作中提出的用于推断等离子体气泡漂移速度的方法似乎有可能在未来的研究中为该领域提供新的数据源。以及从以前的研究中获得的结果。因此,这项工作中提出的用于推断等离子体气泡漂移速度的方法似乎有可能在未来的研究中为该领域提供新的数据源。
更新日期:2021-08-07
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