Remote sensing ionospheric variations due to total solar eclipse, using GNSS observations
For years great interest has been taken in the effects of physical phenomena on ionosphere structure. A total solar eclipse was visible in North America on August 21st, 2017. This event offered a great opportunity for remote sensing the ionospheric behavior under the eclipse condition. In this study...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2020-05-01
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| Series: | Geodesy and Geodynamics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674984719300394 |
| _version_ | 1819066772800667648 |
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| author | Mohamad Mahdi Alizadeh Harald Schuh Saeed Zare Sahar Sobhkhiz-Miandehi Lung-Chih Tsai |
| author_facet | Mohamad Mahdi Alizadeh Harald Schuh Saeed Zare Sahar Sobhkhiz-Miandehi Lung-Chih Tsai |
| author_sort | Mohamad Mahdi Alizadeh |
| collection | DOAJ |
| description | For years great interest has been taken in the effects of physical phenomena on ionosphere structure. A total solar eclipse was visible in North America on August 21st, 2017. This event offered a great opportunity for remote sensing the ionospheric behavior under the eclipse condition. In this study we investigated the effects of total solar eclipse on variations of Total Electron Content (TEC), and consequently deviations on regional models of Vertical TEC (VTEC), as well as variations in ionospheric scintillation occurrence. Although variations of TEC due to total solar eclipse are studied thoroughly by many authors, but the effect of solar eclipse on ionospheric scintillation has never been considered before. Our study is based on measurements from a high-rate GPS network over North America on the day of eclipse, a day before and after its occurrence, on the other hand, GPS measurements from ground-based stations on similar days were used to model TEC on the day of event, and also one day before and after it. The results of this study demonstrate that solar eclipse reduced scintillation occurrence at the totality region up to 28 percent and TEC values showed a decrease of maximum 7 TECU. Considering TEC models, our study showed apparent variations in the regional models, which confirms previous studies on ionospheric responses to eclipse as well as theoretical assumptions. |
| first_indexed | 2024-12-21T16:07:41Z |
| format | Article |
| id | doaj.art-74b2a089f35a41fab21a72289a826129 |
| institution | Directory Open Access Journal |
| issn | 1674-9847 |
| language | English |
| last_indexed | 2024-12-21T16:07:41Z |
| publishDate | 2020-05-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Geodesy and Geodynamics |
| spelling | doaj.art-74b2a089f35a41fab21a72289a8261292022-12-21T18:57:52ZengKeAi Communications Co., Ltd.Geodesy and Geodynamics1674-98472020-05-01113202210Remote sensing ionospheric variations due to total solar eclipse, using GNSS observationsMohamad Mahdi Alizadeh0Harald Schuh1Saeed Zare2Sahar Sobhkhiz-Miandehi3Lung-Chih Tsai4Dept. of Geodesy and Geomatics Eng., K. N. Toosi University of Technology, Tehran, Iran; Inst. of Geodesy and Geoinformation Science, Technical University of Berlin, Berlin, Germany; Corresponding author. Dept. of Geodesy and Geomatics Eng., K. N. Toosi University of Technology, Tehran, Iran.Inst. of Geodesy and Geoinformation Science, Technical University of Berlin, Berlin, Germany; Dept. 1: Geodesy, GFZ German Research Center for Geosciences, Potsdam, GermanyDept. of Geodesy and Geomatics Eng., K. N. Toosi University of Technology, Tehran, IranDept. of Geodesy and Geomatics Eng., K. N. Toosi University of Technology, Tehran, IranCenter for Space and Remote Sensing Research, National Central University, Chung-Li, Taiwan, China; GPS Application and Research Center, National Central University, Chung-Li, Taiwan, ChinaFor years great interest has been taken in the effects of physical phenomena on ionosphere structure. A total solar eclipse was visible in North America on August 21st, 2017. This event offered a great opportunity for remote sensing the ionospheric behavior under the eclipse condition. In this study we investigated the effects of total solar eclipse on variations of Total Electron Content (TEC), and consequently deviations on regional models of Vertical TEC (VTEC), as well as variations in ionospheric scintillation occurrence. Although variations of TEC due to total solar eclipse are studied thoroughly by many authors, but the effect of solar eclipse on ionospheric scintillation has never been considered before. Our study is based on measurements from a high-rate GPS network over North America on the day of eclipse, a day before and after its occurrence, on the other hand, GPS measurements from ground-based stations on similar days were used to model TEC on the day of event, and also one day before and after it. The results of this study demonstrate that solar eclipse reduced scintillation occurrence at the totality region up to 28 percent and TEC values showed a decrease of maximum 7 TECU. Considering TEC models, our study showed apparent variations in the regional models, which confirms previous studies on ionospheric responses to eclipse as well as theoretical assumptions.http://www.sciencedirect.com/science/article/pii/S1674984719300394IonosphereSolar eclipseRemote sensingIonospheric scintillationTotal electron contentGPS measurements |
| spellingShingle | Mohamad Mahdi Alizadeh Harald Schuh Saeed Zare Sahar Sobhkhiz-Miandehi Lung-Chih Tsai Remote sensing ionospheric variations due to total solar eclipse, using GNSS observations Geodesy and Geodynamics Ionosphere Solar eclipse Remote sensing Ionospheric scintillation Total electron content GPS measurements |
| title | Remote sensing ionospheric variations due to total solar eclipse, using GNSS observations |
| title_full | Remote sensing ionospheric variations due to total solar eclipse, using GNSS observations |
| title_fullStr | Remote sensing ionospheric variations due to total solar eclipse, using GNSS observations |
| title_full_unstemmed | Remote sensing ionospheric variations due to total solar eclipse, using GNSS observations |
| title_short | Remote sensing ionospheric variations due to total solar eclipse, using GNSS observations |
| title_sort | remote sensing ionospheric variations due to total solar eclipse using gnss observations |
| topic | Ionosphere Solar eclipse Remote sensing Ionospheric scintillation Total electron content GPS measurements |
| url | http://www.sciencedirect.com/science/article/pii/S1674984719300394 |
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