Study of Total Electron Content-TEC and electron density profile during geomagnetic storms

Bhattarai, Niraj; Chapagain, Narayan P.; Adhikari, Binod

doi:10.48550/arxiv.1803.06066

Cited by 3 publications

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“…The solar wind velocity, temperature, and density change dramatically during a geomagnetic disturbance, along with large variations in the north-south component of the interplanetary magnetic fields (IMF-Bz). However, during quiet periods, measurements on the ground show no significant disturbances [10,11]. In addition, the geomagnetic storm caused significant ionospheric irregularities in the auroral region [12].…”

Section: Introductionmentioning

confidence: 99%

Variation of Total Electron Content in the Quiet and Disturbed Period and Their Correlation with Solar Wind Parameters

et al. 2022

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Total electron content and electron density are the fundamental parameters that determine the main properties of the ionosphere. We have observed variation of Global Positioning System (GPS) derived Vertical Total Electron Content (VTEC) on three different geomagnetic events. The observed VTEC data is recorded from four GPS stations at different locations (87.26°E, 26.48°N); (85.79°E, 27.87°N); (84.57°E, 28.17°N), and (86.70°E, 27.81°N). To determine the severity of storms, we analysed the north-south component of interplanetary magnetic field (IMF-Bz), solar wind parameters- solar wind speed (Vsw) and solar wind dynamic pressure (Psw) ,and geomagnetic indices- Dst index, Kp index and Auroral Electrojet (AE). For all the studied event days, we observed intensified VTEC on geomagnetically disturbed days over quiet days. The VTEC enhancement was significantly high on the severely disturbed day, followed by the moderate storm and the minor storm.The study made to observe association of VTEC with different interplanetary and geomagnetic indices shows that during all studied event days, VTEC enhancement is positively correlated with Vsw, Psw, AE and Kp with cross-correlation coefficient above 0.8 at zero time lag and strong negative correlation with Dst index. In contrast, the correlation of IMF-Bz vary with the intensity of storm. Our finding show a significant variation in VTEC during the geomagnetic disturbances, supporting previous studies on ionospheric responses to geomagnetic storms as well as theoretical assumptions.

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Section: Introductionmentioning

confidence: 99%

Variation of Total Electron Content in the Quiet and Disturbed Period and Their Correlation with Solar Wind Parameters

et al. 2022

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“…Storms have an impact on the Earth's ionosphere, causing uctuations in Total Electron Content (TEC). TEC is an important indicator that quanti es the number of electrons inside a vertical column of the ionosphere, spanning from 50 km to 1000 km above the Earth's surface (Bhattarai et al, 2018) and 1 TEC unit = 1×10 16 electrons/m 2 . Signi cant information on the effects of space weather on satellite systems, communication, and navigation may be obtained by comprehending the latitudinal response of ionospheric thermoelectric conduction during geomagnetic storms (Kintner et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Ionospheric TEC variations during an intense geomagnetic storm on 11 May 2024

Nagaraja

2024

Preprint

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On May 11, 2024, a severe geomagnetic storm occurred, causing significant disruptions to Earth’s magnetosphere and ionosphere. These storms, primarily caused by solar activity, are distinguished by variations in solar wind that increase energy flow from the Sun to Earth. The present research aims to analyze the latitudinal response of ionospheric Total Electron Content (TEC) during this event. The analysis is based on data collected from three different geographic locations: IISC (13.02°N, 77.57°E), POL2 (42.68°N, 74.69°E), and NOVM (55.03°N, 82.91°E). The electron density of the ionosphere is crucial for satellite-based communication and navigation systems. Geomagnetic storm strength is measured by the Kp-index and Disturbance storm time (Dst) index. During a geomagnetic storm and X-class flare of magnitude 5.89, a maximum Dst index of -412 nT and Kp index of 9 are observed during the storm day. TEC values increased at IISc during the storm period compared to quiet days, but decreased over POL2 and NOVM stations. A good correlation was observed between the observed TEC during a storm day and the predicted TEC by the IRI-2020 model over IISC and NOVM, while moderate correlation was observed over POL2.

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“…The parameter of the ionosphere that produces most of the effects on radio signals is the total electron content (TEC). TEC is an integral of electron density along the path between the GPS satellite and the receiver (Bhattarai et al 2018), which is calculated as…”

Section: Introductionmentioning

confidence: 99%

Effects of Total Solar Eclipse on Ionospheric Total Electron Content over Antarctica on 2021 December 4

Idosa

Rikitu

2022

ApJ

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The effects of a total solar eclipse that occurred on 2021 December 4 on ionospheric total electron content (TEC) over Antarctic stations were studied. The study was based on GPS data obtained over Antarctica on the day of the eclipse and the days before and after the eclipse over six GPS stations. The findings of this study show that a total solar eclipse lowers the amount of ionization reaching the Earth’s surface with TEC values dropping across the stations. Finally, the enhancement of ΔTEC is quite different from one station to another station. This may also be due to the effect of solar heating conditions and the density of the Sun as exerted over the stations with the Sun side over one station and the clouded part over the others.

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Study of Total Electron Content-TEC and electron density profile during geomagnetic storms

Cited by 3 publications

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Variation of Total Electron Content in the Quiet and Disturbed Period and Their Correlation with Solar Wind Parameters

Variation of Total Electron Content in the Quiet and Disturbed Period and Their Correlation with Solar Wind Parameters

Ionospheric TEC variations during an intense geomagnetic storm on 11 May 2024

Effects of Total Solar Eclipse on Ionospheric Total Electron Content over Antarctica on 2021 December 4

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