Change in Total Electron Content During the 26 December 2019 Solar Eclipse: Constraints From GNSS Observations and Comparison With SAMI3 Model Results
Change in Total Electron Content During the 26 December 2019 Solar Eclipse: Constraints From GNSS Observations and Comparison With SAMI3 Model Results
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DOI：
10.1029/2020ja028230
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发表时间：
2020-10
期刊：
影响因子：
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通讯作者：
Batakrushna Senapati;J. Huba;B. Kundu;V. Gahalaut;Dibyashakti Panda;Saroj Mondal;J. Catherine
中科院分区：
文献类型：
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作者：
Batakrushna Senapati;J. Huba;B. Kundu;V. Gahalaut;Dibyashakti Panda;Saroj Mondal;J. Catherine
我们报告了由2019年12月26日日的日环食引起的电离层总电子含量（TEC）的时空变化，在东南亚大部分地区都可以看到。分布在大陆部分和岛屿上的全球导航卫星系统站点稀疏网络记录了电离层电子密度的跨半球共椭圆变化。沿着日食阴影的路径，观测到了~6-8 TECU（1 TECU = 1 × 1016电子m−2）的TEC显著损耗。使用SAMI 3模型的模拟结果与TEC消耗的观测结果一致。该模型还预测了在日本北方和邻近的太平洋附近存在一个TEC边缘增加约0.2-0.3 TECU的磁共轭区域，这也与该区域的地基GNSS观测结果一致。
We report spatiotemporal variation in the total electron content (TEC) in ionosphere caused by the 26 December 2019 annular solar eclipse, seen over most of the Southeast Asia. Sparsely distributed network of the Global Navigation Satellite System (GNSS) sites located on the continental parts and on islands documented the transhemispheric coellipse changes in the ionospheric electron density. A significant depletion in TEC of ~6–8 TECU (1 TECU = 1 × 1016 electrons m−2) is observed along the path of the eclipse shadow. Simulations using the SAMI3 model are consistent with the observations of TEC depletion. The model also predicted a magnetically conjugate region of marginal increased TEC of ~0.2–0.3 TECU around northern Japan and adjacent Pacific Ocean, which is also consistent with the ground‐based GNSS observations in that region.