Ionospheric Bow Wave Induced by the Moon Shadow Ship Over the Continent of United States on 21 August 2017
Ionospheric Bow Wave Induced by the Moon Shadow Ship Over the Continent of United States on 21 August 2017
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DOI：
10.1002/2017gl075926
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发表时间：
2018-01
影响因子：
5.2
通讯作者：
Yang‐Yi Sun;Jann‐Yenq Liu;C. Lin;Chi‐Yen Lin;M. Shen;Chieh‐Hung Chen;Chia‐Hung Chen;M. Chou
中科院分区：
文献类型：
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作者：
Yang‐Yi Sun;Jann‐Yenq Liu;C. Lin;Chi‐Yen Lin;M. Shen;Chieh‐Hung Chen;Chia‐Hung Chen;M. Chou
2017 年 8 月 21 日，日全食的月影从西向东扫过美国大陆（CONUS）。来自 2,255 个地面全球导航卫星系统接收器的大量总电子含量（从 0 公里到 20,200 公里高度的电子密度积分）观测表明，月影船产生了一个巨大的电离层弓形波前，距离覆盖整个 CONUS 的全食路径延伸约 1,500 公里。弓波前由超音速/近超音速月影船引起的声冲击波和由于阴影区域内太阳辐射减少而产生的显着等离子体重组组成。深弓波谷（−0.02 总电子含量单位（1 TECU = 1016 el m−2）面积）几乎与整个日食期间沿着圆锥体上的全食路径移动的 100% 遮光度一致。超音速月影船在船前诱发弓波波峰（约 80% 遮光度）。首次在全食附近发现声波冲击波形成的弓波波谷和波峰。
A moon shadow of the total solar eclipse swept through the continent of United States (CONUS) from west to east on 21 August 2017. Massive total electron content (integration of electron density from 0 km to 20,200 km altitude) observations from 2,255 ground‐based Global Navigation Satellite System receivers show that the moon shadow ship generates a great ionospheric bow wave front which extends ~1,500 km away from the totality path covering the entire CONUS. The bow wave front consists of the acoustic shock wave due to the supersonic/near‐supersonic moon shadow ship and the significant plasma recombination due to the reduction in solar irradiation within the shadow area. The deep bow wave trough (−0.02 total electron content unit (1 TECU = 1016 el m−2) area) nearly coincides with the 100% obscuration moving along the totality path over the CONUS through the entire eclipse period. The supersonic moon shadow ship induces a bow wave crest in front of the ship (~80% obscuration). It is the first time to find the acoustic shock wave‐formed bow wave trough and crest near the totality.