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Browsing by Subject "D-region ionosphere"

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D‐region ionosphere response to the total solar eclipse of 22 July 2009 deduced from ELF‐VLF tweek observations in the Indian sector

Singh, Rajesh; Veenadhari, B.; Maurya, A.K.; Cohen, Morris B.; Kumar, Sushil; Selvakumaran, R.; Pant, P.; Singh, Abhay K.; Inan, Umran S. (2011)

Observations of tweeks with higher harmonics (n > 1) at low latitude stations Allahabad and Nainital, in the Indian sector, during the total solar eclipse on 22 July 2009, are presented. Allahabad and Nainital stations ...
Effect of 21 June 2020 solar eclipse on the ionosphere using VLF and GPS observations and modeling

Tripathi, Gaurish; Singh, S.B.; Kumar, Sanjay; Singh, Ashutosh K.; Singh, Rajesh; Singh, A.K. (2022)

A solar eclipse event provides a great opportunity to examine the behavioral concept of the ionospheric electron density (Ne) variability in the low latitude region. The current work presents our outcomes from the simultaneous ...
ELF/VLF wave studies of ionosphere and magnetosphere electromagnetic phenomenon in low latitude region

Maurya, Ajeet Kumar (Indian Institute of Geomagnetism, Mumbai, 2013)
Extreme space weather events of solar cycle 24: X-class solar flares and their impact on the low-latitude D-region ionosphere

Venkatesham, K.; Maurya, Ajeet K.; Singh, Rajesh; Dwivedi, Suneet (2023)

X-class solar flares, which occurred in the daytime from 2008 to 2016 during solar cycle 24, were studied for their influence on the lower ionosphere over the low-equatorial Indian region. To understand the D-region behaviour ...
Extreme space-weather effect on D-region ionosphere in Indian low latitude region

Venkatesham, K.; Singh, Rajesh (2018)

The present study delineates on the observations and modelling of low latitude D-region ionosphere perturbations caused by strongest solar flare (X6.9) of solar cycle 24. An extreme space weather event occurred on 9 ...
Initial results from AWESOME VLF receivers: set up in low latitude Indian regions under IHY2007/UNBSSI program

Singh, Rajesh; Veenadhari, B.; Cohen, M.B.; Pant, P.; Singh, A.K.; Maurya, A.K.; Vohat, P.; Inan, U.S. (2010)

This article delineates preliminary results obtained from three newly set up very low frequency (VLF) radio receiver observation stations at low latitude Indian sites Allahabad (16.49°N), Nainital (20.48°N) and Varanasi ...
Solar flares induced D-region ionospheric and geomagnetic perturbations

Selvakumaran, R.; Maurya, A.K.; Gokani, Sneha A.; Veenadhari, B.; Kumar, Sushil; Venkatesham, K.; Phanikumar, D.V.; Singh, Abhay K.; Siingh, Devendraa; Singh, Rajesh (2015)

The D-region ionospheric perturbations caused by solar flares which occurred during January 2010–February 2011, a low solar activity period of current solar cycle 24, have been examined on NWC transmitter signal (19.8 kHz) ...
Waves-like signatures in the D-region ionosphere generated by solar flares

Maurya, Ajeet K; Singh, Rajesh; Kumar, Sushil; Kumar, D.V. Phani; Veenadhari, B. (2014)

The present study reports presence of periodic Wave-Like Signatures (WLS) in the D-region ionosphere detected using NWC, Australia, VLF navigational transmitter signal (19.8 kHz) observed at Allahabad, an Indian low latitude ...

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