IonosphericTotal Electron Content Changes during the 15 February 2018 and 30 April 2022 Solar Eclipses over South America and Antarctica
This is one of the first papers to study the ionospheric effects of two solar eclipses that occurred in South America and Antarctica under geomagnetic activity in different seasons (summer and autumn) and their impact on the equatorial ionization anomaly (EIA). The changes in total electron content...
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ftdoajarticles:oai:doaj.org/article:185584a995aa4e11be6e3cdeb7262a29 2023-11-12T04:08:15+01:00 IonosphericTotal Electron Content Changes during the 15 February 2018 and 30 April 2022 Solar Eclipses over South America and Antarctica Juan Carlos Valdés-Abreu Marcos Díaz Manuel Bravo Yohadne Stable-Sánchez 2023-10-01T00:00:00Z https://doi.org/10.3390/rs15194810 https://doaj.org/article/185584a995aa4e11be6e3cdeb7262a29 EN eng MDPI AG https://www.mdpi.com/2072-4292/15/19/4810 https://doaj.org/toc/2072-4292 doi:10.3390/rs15194810 2072-4292 https://doaj.org/article/185584a995aa4e11be6e3cdeb7262a29 Remote Sensing, Vol 15, Iss 4810, p 4810 (2023) ionosphere solar eclipse global positioning system (GPS) satellite measurements total electron content (TEC) in situ measurements Science Q article 2023 ftdoajarticles https://doi.org/10.3390/rs15194810 2023-10-15T00:35:17Z This is one of the first papers to study the ionospheric effects of two solar eclipses that occurred in South America and Antarctica under geomagnetic activity in different seasons (summer and autumn) and their impact on the equatorial ionization anomaly (EIA). The changes in total electron content (TEC) during the 15 February 2018 and 30 April 2022 partial solar eclipses will be analyzed. The study is based on more than 390 GPS stations, Swarm-A, and DMSP F18 satellite measurements, such as TEC, electron density, and electron temperature. The ionospheric behaviors over the two-fifth days on both sides of each eclipse were used as a reference for estimating TEC changes. Regional TEC maps were created for the analysis. Background TEC levels were significantly higher during the 2022 eclipse than during the 2018 eclipse because ionospheric levels depend on solar index parameters. On the days of the 2018 and 2022 eclipses, the ionospheric enhancement was noticeable due to levels of geomagnetic activity. Although geomagnetic forcing impacted the ionosphere, both eclipses had evident depletions under the penumbra, wherein differential vertical TEC (DVTEC) reached values <−40%. The duration of the ionospheric effects persisted after 24 UT. Also, while a noticeable TEC depletion (DVTEC ∼−50%) of the southern EIA crest was observed during the 2018 eclipse (hemisphere summer), an evident TEC enhancement (DVTEC > 30%) at the same crest was seen during the eclipse of 2022 (hemisphere autumn). Swarm-A and DMSP F18 satellite measurements and analysis of other solar eclipses in the sector under quiet conditions supported the ionospheric behavior. Article in Journal/Newspaper Antarc* Antarctica Directory of Open Access Journals: DOAJ Articles Eia ENVELOPE(7.755,7.755,63.024,63.024) Remote Sensing 15 19 4810 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
ionosphere solar eclipse global positioning system (GPS) satellite measurements total electron content (TEC) in situ measurements Science Q |
spellingShingle |
ionosphere solar eclipse global positioning system (GPS) satellite measurements total electron content (TEC) in situ measurements Science Q Juan Carlos Valdés-Abreu Marcos Díaz Manuel Bravo Yohadne Stable-Sánchez IonosphericTotal Electron Content Changes during the 15 February 2018 and 30 April 2022 Solar Eclipses over South America and Antarctica |
topic_facet |
ionosphere solar eclipse global positioning system (GPS) satellite measurements total electron content (TEC) in situ measurements Science Q |
description |
This is one of the first papers to study the ionospheric effects of two solar eclipses that occurred in South America and Antarctica under geomagnetic activity in different seasons (summer and autumn) and their impact on the equatorial ionization anomaly (EIA). The changes in total electron content (TEC) during the 15 February 2018 and 30 April 2022 partial solar eclipses will be analyzed. The study is based on more than 390 GPS stations, Swarm-A, and DMSP F18 satellite measurements, such as TEC, electron density, and electron temperature. The ionospheric behaviors over the two-fifth days on both sides of each eclipse were used as a reference for estimating TEC changes. Regional TEC maps were created for the analysis. Background TEC levels were significantly higher during the 2022 eclipse than during the 2018 eclipse because ionospheric levels depend on solar index parameters. On the days of the 2018 and 2022 eclipses, the ionospheric enhancement was noticeable due to levels of geomagnetic activity. Although geomagnetic forcing impacted the ionosphere, both eclipses had evident depletions under the penumbra, wherein differential vertical TEC (DVTEC) reached values <−40%. The duration of the ionospheric effects persisted after 24 UT. Also, while a noticeable TEC depletion (DVTEC ∼−50%) of the southern EIA crest was observed during the 2018 eclipse (hemisphere summer), an evident TEC enhancement (DVTEC > 30%) at the same crest was seen during the eclipse of 2022 (hemisphere autumn). Swarm-A and DMSP F18 satellite measurements and analysis of other solar eclipses in the sector under quiet conditions supported the ionospheric behavior. |
format |
Article in Journal/Newspaper |
author |
Juan Carlos Valdés-Abreu Marcos Díaz Manuel Bravo Yohadne Stable-Sánchez |
author_facet |
Juan Carlos Valdés-Abreu Marcos Díaz Manuel Bravo Yohadne Stable-Sánchez |
author_sort |
Juan Carlos Valdés-Abreu |
title |
IonosphericTotal Electron Content Changes during the 15 February 2018 and 30 April 2022 Solar Eclipses over South America and Antarctica |
title_short |
IonosphericTotal Electron Content Changes during the 15 February 2018 and 30 April 2022 Solar Eclipses over South America and Antarctica |
title_full |
IonosphericTotal Electron Content Changes during the 15 February 2018 and 30 April 2022 Solar Eclipses over South America and Antarctica |
title_fullStr |
IonosphericTotal Electron Content Changes during the 15 February 2018 and 30 April 2022 Solar Eclipses over South America and Antarctica |
title_full_unstemmed |
IonosphericTotal Electron Content Changes during the 15 February 2018 and 30 April 2022 Solar Eclipses over South America and Antarctica |
title_sort |
ionospherictotal electron content changes during the 15 february 2018 and 30 april 2022 solar eclipses over south america and antarctica |
publisher |
MDPI AG |
publishDate |
2023 |
url |
https://doi.org/10.3390/rs15194810 https://doaj.org/article/185584a995aa4e11be6e3cdeb7262a29 |
long_lat |
ENVELOPE(7.755,7.755,63.024,63.024) |
geographic |
Eia |
geographic_facet |
Eia |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Remote Sensing, Vol 15, Iss 4810, p 4810 (2023) |
op_relation |
https://www.mdpi.com/2072-4292/15/19/4810 https://doaj.org/toc/2072-4292 doi:10.3390/rs15194810 2072-4292 https://doaj.org/article/185584a995aa4e11be6e3cdeb7262a29 |
op_doi |
https://doi.org/10.3390/rs15194810 |
container_title |
Remote Sensing |
container_volume |
15 |
container_issue |
19 |
container_start_page |
4810 |
_version_ |
1782328591420227584 |