GNSS Observations of Ionospheric Variations During the 21 August 2017 Solar Eclipse

被引：113

作者：

Coster, Anthea J. ^{[1
]}

Goncharenko, Larisa ^{[1
]}

Zhang, Shun-Rong ^{[1
]}

Erickson, Philip J. ^{[1
]}

Rideout, William ^{[1
]}

Vierinen, Juha ^{[2
]}

机构：

[1] MIT, Haystack Observ, Westford, MA 01886 USA

[2] Univ Tromso, Dept Phys & Technol, Tromso, Norway

来源：

GEOPHYSICAL RESEARCH LETTERS | 2017年 / 44卷 / 24期

基金：

美国国家科学基金会;

关键词：

eclipse; total electron content; traveling ionospheric disturbances; GNSS networks; mountain waves; TOTAL ELECTRON-CONTENT; NORTH-AMERICA; THERMOSPHERE; ATMOSPHERE; EUROPE; TEC;

D O I：

10.1002/2017GL075774

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

On 21 August 2017, during daytime hours, a total solar eclipse with a narrow similar to 160km wide umbral shadow occurred across the continental United States. Totality was observed from the Oregon coast at similar to 9:15 local standard time (LST) (17:20 UT) to the South Carolina coast at similar to 13:27 LST (18:47 UT). A dense network of Global Navigation Satellite Systems (GNSS) receivers was utilized to produce total electron content (TEC) and differential TEC. These data were analyzed for the latitudinal and longitudinal response of the TEC and for the presence of traveling ionospheric disturbances (TIDs) during eclipse passage. A significant TEC depletion, in some cases greater than 60%, was observed associated with the eclipse shadow, exceeding initial model predictions of 35%. Evidence of enhanced large-scale TID activity was detected over the United States prior to and following the large TEC depletion observed near the time of totality. Signatures of enhanced TEC structures were observed over the Rocky Mountain chain during the main period of TEC depletion.

引用

页码：12041 / 12048

页数：8

共 28 条

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