Tomographic Imaging of a Large Scale TID during the Halloween Storm of 2003
Tomographic Imaging of a Large Scale TID during the Halloween Storm of 2003
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DOI：
10.5194/angeo-2020-26
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发表时间：
2020-05
影响因子：
1.9
通讯作者：
K. Bolmgren;C. Mitchell;Talini Pinto Jayawardena;G. Bust;Jon Bruno
中科院分区：
文献类型：
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作者：
K. Bolmgren;C. Mitchell;Talini Pinto Jayawardena;G. Bust;Jon Bruno
抽象的。最近观测到的最强烈的电离层风暴发生在2003年10月29日至31日。高纬度地区的扰动引发了几次大尺度移动电离层扰动（LSTIDS），电离层电子密度的波动。本文利用北美全球定位系统（GPS）接收机网络数据和层析成像技术研究了2003年10月31日发生的一次特殊的电离层移动扰动（TID）。TID的估计周期为30分钟，估计水平波长为700公里，并在北美向西南传播。波的层析重建验证使用模拟的观测和独立的观测电离层探测仪和CHAMP平面朗缪尔探针。结果进行了讨论的背景下，磁和电离层的条件，可能有助于发射的波。大规模的TID是具有挑战性的研究在地球的大区域，这里的GPS网络被证明提供了一个独特的视角上的TID的空间和时间变化。实验结果得到了模拟的支持，模拟显示了更密集的接收器网络，如近年来可用的那样，将提高TID成像的精度。
Abstract. The most intense ionospheric storm observed in recent times occurred between 29–31 October 2003. The disturbances to the high-latitude regions set off several Large-Scale Travelling Ionospheric Disturbances (LSTIDs), wavelike perturbations in the ionospheric electron density. This paper investigates one particular Travelling Ionospheric Disturbance (TID) on 31 October 2003 using North American Global Positioning System (GPS) receiver network data and a tomographic imaging technique. The TID has an estimated period of 30 min, an estimated horizontal wavelength of 700 km and propagates South-Westward over North America. The tomographic reconstruction of the wave is validated using a simulation of the observations and with independent observations from ionosondes and the CHAMP Planar Langmuir Probe. The results are discussed in the context of the magnetic and ionospheric conditions that may have contributed to the launch of the wave. Large-scale TIDs are challenging to study over large regions of the Earth, and the GPS network here is shown to offer a unique perspective on the spatial and temporal variation of the TID. The experimental results are backed up by simulations that show a denser network of receivers, as is available in more recent years, would produce improved accuracy in the TID imaging.