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Characterization of ionospheric irregularities over the equatorial and low latitude Nigeria region

Simi, K. G.; Ogwala, Aghogho; Oyedokun, Oluwole John +5 more

Ionospheric irregularity poses severe challenges to the highly dynamic satellite communication, navigation and tracking operations that rely on transionospheric satellite services like the operation of the Global Navigation Satellite System (GNSS). Although numerous studies on the effect of geomagnetic storms on the inhibition or suppression of ir…

Variation of ionospheric plasma density during the annular solar eclipse on December 26, 2019

Palit, Sourav; Kundu, Subrata; Chowdhury, Swati +2 more

The annular solar eclipse of the previous decade that occurred on December 26, 2019, was mostly visible from most Asian countries, including India. In this manuscript, we present the variation of ionospheric plasma density profiles at different heights during the eclipse and non-eclipse days. We use both the ground- and space-based instruments to …

Active region and flare ribbon properties associated with X-class flares and CMEs of solar cycle 24

Moon, Y. -J.; Shanmugaraju, A.; Lim, Daye +4 more

The solar eruptive events and their origin are important in the context of forecasting their occurrence and their effects on the space and the earth. In this paper, a set of 45 X-class flare-associated coronal mass ejections (CMEs) and their source region characteristics are analysed. The X-ray flares and white light CMEs were observed by GOES and…

Constructing a global ionospheric TEC map with a high spatial and temporal resolution by spherical harmonic functions

Xiong, Bo; Wang, Yuqing; Li, Xiaolin +2 more

The Massachusetts Institute of Technology (MIT) Haystack Observatory provides the ionospheric Total Electron Content (TEC) data with a temporal resolution of 5 minutes and limited spatial coverage, as they do not provide data where there are no TEC measurements. To improve the spatial coverage of MIT-TEC, we have proposed an approach for construct…

Kinematics and interplanetary characteristics of a halo Coronal Mass Ejection: a multi-wavelength analysis

Ebenezer, E.; Soni, Shirsh Lata

In this paper, we present the evolution and speed expansion of a shock driven by a Coronal Mass Ejection (CME) that triggered a type II radio. We combine radio analysis with a broad range of observations taken by other ground-based and space borne observatories to track the evolution of this CME/shock from Sun to 1 AU. The Halo CME studied here oc…