Multi-Instrument Observations of the Ionospheric Response to the 26 December 2019 Solar Eclipse Over Indian and Southeast Asian Longitudes

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dc.contributor.author Barad, R. K.
dc.contributor.author Sripathi, S.
dc.contributor.author England, S. L.
dc.date.accessioned 2023-02-21T05:50:18Z
dc.date.available 2023-02-21T05:50:18Z
dc.date.issued 2022
dc.identifier.citation JGR Space Physics, v. 127, 9, https://doi.org/10.1029/2022JA030330 en_US
dc.identifier.uri http://library.iigm.res.in:8080/xmlui/handle/123456789/1701
dc.description.abstract Here, the impact of the 26 December 2019 solar eclipse on the equatorial and low latitude ionosphere has been investigated using ground and space-based observations over Indian and Southeast Asian longitudes. The high-resolution Ionosonde observations at Tirunelveli, GPS Total Electron Content (TEC) observations from a chain of GPS receivers along and across the eclipse path, TIMED-SABER, and Ionospheric Connection Explorer (ICON) satellites were utilized to investigate the eclipse-induced variations in electron density and thermospheric cooling. We noticed a tremendous increase and decrease in the base height of the F-layer, resembling the nighttime Pre-Reversal Enhancement (PRE). Near the eclipse maximum, a strong blanketing sporadic E layer was observed at Tirunelveli with a top frequency of ∼18 MHz for 1 hr and 26 min. Satellite traces (STs) and “U” shaped ionograms were noticed for the first time over Tirunelveli during eclipse maximum and end phases. The “STs” and “U” shaped traces indicate the presence of short-period gravity waves or TID type of wave perturbations over the Indian region. A maximum of ∼5–7 TECU (30%–40%) decrease in TEC is observed on the eclipse day for iisc, hyde, and tiru stations. Periodogram analyses of TEC data showed the presence of wavelike structures with periodicities of 18–24 min for different stations. Simultaneous observations from the ICON satellite showed an increase and decrease in hmF2 and NmF2 which matches well with the ionosonde observations from Tirunelveli. The temperature profiles from TIMED-SABER and ICON satellites showed a reduction and enhancement in the lower and upper E regions respectively. en_US
dc.language.iso en en_US
dc.subject Solar eclipse en_US
dc.subject Gravity waves en_US
dc.subject Satellite traces en_US
dc.subject Equatorial ionosphere en_US
dc.subject Ionosonde observations en_US
dc.subject GPS TEC observations en_US
dc.title Multi-Instrument Observations of the Ionospheric Response to the 26 December 2019 Solar Eclipse Over Indian and Southeast Asian Longitudes en_US
dc.type Article en_US
dcterms.source https://doi.org/10.1029/2022JA030330


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