K
K. Venkatesh
Researcher at National Atmospheric Research Laboratory
Publications - 45
Citations - 723
K. Venkatesh is an academic researcher from National Atmospheric Research Laboratory. The author has contributed to research in topics: TEC & Total electron content. The author has an hindex of 13, co-authored 40 publications receiving 495 citations. Previous affiliations of K. Venkatesh include Andhra University & University of Paraíba Valley.
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Journal ArticleDOI
Positive and negative GPS‐TEC ionospheric storm effects during the extreme space weather event of March 2015 over the Brazilian Sector
Paulo Roberto Fagundes,F. A. Cardoso,Bela G. Fejer,K. Venkatesh,Brunno Augusto Ribeiro,Valdir Gil Pillat +5 more
TL;DR: In this article, the authors studied the response of the ionosphere (F region) in the Brazilian sector during extreme space weather event of 17 March 2015 using a large network of 102 GPS-total electron content (TEC) stations.
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Electrodynamic disturbances in the Brazilian equatorial and low-latitude ionosphere on St. Patrick's Day storm of 17 March 2015
TL;DR: In this article, the St. Patrick's Day storm of 17th March, 2015 has a long lasting main phase with the Dst reaching a minimum of -223 nT. During the main phase, two strong prompt penetration electric field (PPEF) phases took place; first with the southward turning of IMF Bz around ~1200 UT and the onset of a substorm around ~1725 UT leading to strong equatorial zonal electric field enhancements.
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Day-to-day variability of equatorial electrojet and its role on the day-to-day characteristics of the equatorial ionization anomaly over the Indian and Brazilian sectors
K. Venkatesh,Paulo Roberto Fagundes,D. S. V. V. D. Prasad,Clezio Marcos Denardini,A. J. de Abreu,R. de Jesus,R. de Jesus,Mauricio Gende +7 more
TL;DR: In this paper, the authors reported simultaneous variations of the equatorial electrojet (EEJ) and GPS-TEC over Indian and Brazilian sectors to understand the role of EEJ on the day-to-day characteristics of the EIA.
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Vertical electron density and topside effective scale height ( H T ) variations over the Indian equatorial and low latitude stations
TL;DR: In this article, bottom-side electron density profiles derived from ground-based ionosonde data and the ROCSAT-1 in-situ electron density data were used to determine the estimates of the topside ionosphere density profiles using α-Chapman function over an equatorial station Trivandrum (8.47° N, 76.91° E) and a low latitude station Waltair (17.7°N, 83.3°E) in the Indian region.
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On the performance of the IRI-2012 and NeQuick2 models during the increasing phase of the unusual 24th solar cycle in the Brazilian equatorial and low-latitude sectors
K. Venkatesh,Paulo Roberto Fagundes,G. K. Seemala,R. de Jesus,A. J. de Abreu,Valdir Gil Pillat +5 more
TL;DR: In this paper, the performance of the latest available IRI-2012 and NeQuick2 models have been investigated during 2010-2013 in the increasing phase of the 24th solar cycle.