Swarm Satellite Observations of the 21 August 2017 Solar Eclipse

Hussien, Fayrouz; Ghamry, Essam; Fathy, Adel; Mahrous, Salah

doi:10.5140/jass.2020.37.1.29

Cited by 8 publications

(3 citation statements)

References 30 publications

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“…Also, our T e decrease values are consistent with the findings of earlier studies. For example, previous work reported drops in temperature (T e ∼−50 to −20%) under the shadow of the 21 August 2017 total solar eclipse [76][77][78] and 26 December 2019 annular solar eclipse [28]. The effects on the ionosphere were observed post-eclipse of 2022 with the satellites.…”

Section: Swa and F18 Measurementsmentioning

confidence: 95%

IonosphericTotal Electron Content Changes during the 15 February 2018 and 30 April 2022 Solar Eclipses over South America and Antarctica

Valdés-Abreu,

Díaz,

Bravo

et al. 2023

Remote Sensing

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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.

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Section: Swa and F18 Measurementsmentioning

confidence: 95%

IonosphericTotal Electron Content Changes during the 15 February 2018 and 30 April 2022 Solar Eclipses over South America and Antarctica

Valdés-Abreu,

Díaz,

Bravo

et al. 2023

Remote Sensing

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“…States and traveling through the lunar penumbra. Swarm mission data over the United States was used by Hussien et al [28] to study the effects of solar eclipses on electron temperature, slanted TEC (STEC), and electron density. It can be inferred from observations that (1) a notable decrease in electron density and STEC coincided with the eclipse, possibly as a result of extreme ultraviolet reduction favoring dissociative recombination over photoionization, (2) The electron temperature in 41°-57° latitude decreased by up to 150K compared to the reference date (December 23) [28].…”

Section: Ionospherementioning

confidence: 99%

“…and ionospheric changes caused by earthquakes or solar eclipses [27,28] have been studied. Papers related to the polar ionosphere include polar cap and aurora observations from European Incoherent Scatter (EISCAT) radar [29] and JBS Vertical Incidence Pulsed Ionospheric Radar (VIPIR) observation results [30].…”

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confidence: 99%

Latest Research Trends on Space Environments in Korea

Kim,

Lee,

Kim

2023

J. Space Technol. Appl.

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The Journal of Astronomy and Space Sciences (JASS) has published research papers on a range of topics since its initial publication in 1984, giving space science researchers a platform. In this paper, we reviewed recent publications (2019-2023) that deal with the space environment. In the space environment field, we reviewed 37 papers published in JASS during this time, covering research topics such as the sun, magnetosphere, ionosphere, atmosphere, and space radiation. We hope that researchers in the field will make use of this in the future as it will allow us to share the most recent trends in the field of space environment research that is currently underway.

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