Observations and modeling of D-region ionospheric response of Annular Solar Eclipse on December 26, 2019, using VLF signal amplitude and phase variation

Ghosh, Soujan; Chowdhury, Swati; Kundu, Subrata; Biswas, Sagardweep; Dawn, Arjun; Ray, Suman; Choudhury, A. K.; Bari, Md. Wasimul; Bhowmick, Debashis; Manna, Souvik; Mondal, S. K.; Chakrabarti, S.; Maiti, Rajkumar; Das, Ram C.; Basak, Tamal; Chakrabarti, Sandip K.

doi:10.1007/s10509-023-04179-1

Cited by 4 publications

(1 citation statement)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Kundu et al [36] presented the change in ionospheric plasma density during the annular solar eclipse on 26 December 2019, through multi-directional approaches by using ground-based TEC and space-based Swarm satellite and observed a depletion in TEC and N e that is directly proportional to the solar obscuration function. Several authors have used different instruments (mainly VLF receivers) and computed N e variation using LWPC simulation also [37][38][39][40]. Including ionospheric responses to the partial and annular eclipse in different regions will help the reader to make comparisons with other cases and results obtained from other instruments.…”

Section: Introductionmentioning

confidence: 99%

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

View full text Add to dashboard Cite

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.

show abstract