Zobrazeno 1 - 10
of 68
pro vyhledávání: '"Lee-Anne McKinnell"'
Publikováno v:
Annals of Geophysics, Vol 58, Iss 2 (2015)
In this paper the South African Ionospheric Map (SAIM) is upgraded with the usage of recent International Reference Ionosphere (IRI)-2012 model and South African Bottomside Model (SABIM) version 5 and validated for the critical frequency (foF2) of th
Externí odkaz:
https://doaj.org/article/602f76248d8e4fc0ae668571d2e69113
Publikováno v:
Advances in Space Research. 61:2891-2903
In this paper, the modeling of the ionospheric foF 2 changes during geomagnetic storms by means of neural network (NN) and linear regression (LR) techniques is presented. The results will lead to a valuable tool to model the complex ionospheric chang
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::288afcb0ef0ed853dd9d1d7e2e4e54de
https://doi.org/10.1016/j.asr.2018.03.025
https://doi.org/10.1016/j.asr.2018.03.025
Publikováno v:
Advances in Space Research. 57:245-256
This paper aims to show the results of an ionospheric tomography algorithm called Multi-Instrument Data Analysis System (MIDAS) over the South African region. Recorded data from a network of 49–53 Global Positioning System (GPS) receivers over the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a8c081489c420670f82cc0c64d145943
https://doi.org/10.1016/j.asr.2015.08.017
https://doi.org/10.1016/j.asr.2015.08.017
Autor:
Daniel Okoh, Bonaventure Okere, Pierre J. Cilliers, Lee-Anne McKinnell, Babatunde Rabiu, Chinelo Henrietta Okonkwo
Publikováno v:
Advances in Space Research. 55:1941-1947
Following the recent proliferation of dual-frequency GPS (Global Positioning System) receiver systems across the African continent, there is a growing number of papers that compare vertical Total Electron Content (vTEC) values derived from the Intern
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b3bd21c81623dff0a4f9767bb64c055
https://doi.org/10.1016/j.asr.2014.06.037
https://doi.org/10.1016/j.asr.2014.06.037
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 112:20-30
This paper describes a statistical method (TEC2F2) of estimating the critical frequency (foF2) values from Global Positioning System (GPS) Vertical Total Electron Content (VTEC). The method has been developed over the South African region using the a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df4aa1da1212fafcb56cdb24254ab909
https://doi.org/10.1016/j.jastp.2014.02.003
https://doi.org/10.1016/j.jastp.2014.02.003
Publikováno v:
Advances in Space Research. 53:371-386
A new version of global empirical model for the ionospheric propagation factor, M(3000)F2 prediction is presented. Artificial neural network (ANN) technique was employed by considering the relevant geophysical input parameters which are known to infl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a7b38300beea1c2cc6e4bdcc640481c3
https://doi.org/10.1016/j.asr.2013.11.023
https://doi.org/10.1016/j.asr.2013.11.023
Publikováno v:
Journal of Geophysical Research: Space Physics. 118:7768-7782
[1] In this article, the propagation characteristics of large-scale traveling ionospheric disturbances (LS TIDs) are estimated during the geomagnetic storm periods of 14–16 May 2005 and 25–27 September 2011 over South Africa. One and two GPS arra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac622ee96e6879c9856f7287840b99bd
https://doi.org/10.1002/2013ja018997
https://doi.org/10.1002/2013ja018997
Publikováno v:
Advances in Space Research. 52:1798-1808
This paper presents an investigation into the variability and predictability of the maximum height of the ionospheric F2 layer, hmF2 over the South African region. Data from three South African stations, namely Madimbo (22.4°S, 26.5°E, dip angle:
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4621fc6d42db7a02d21ace80e20b9a8
https://doi.org/10.1016/j.asr.2013.06.022
https://doi.org/10.1016/j.asr.2013.06.022
Publikováno v:
Advances in Space Research. 52:1791-1797
This paper presents the development of a Total Electron Content (TEC) map for the Nigerian ionosphere. In this work, TEC measurements obtained from the AFRL-SCINDA GPS (Air Force Research Laboratory-Scintillation Network Decision Aid, Global Position
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8e5172395b40fc0104575e157908f869
https://doi.org/10.1016/j.asr.2012.11.013
https://doi.org/10.1016/j.asr.2012.11.013
Autor:
G. K. Seemala, Jaroslav Chum, Dalia Buresova, Lee-Anne McKinnell, John Bosco Habarulema, Yongliang Zhang, Chigomezyo M. Ngwira, Ben D.L. Opperman
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 102:105-114
The solar wind effects on the Earth's environment are studied for their basic scientific values and crucial practical impacts on technological systems. This paper reports results of Total Electron Content (TEC) changes during two successive ionospher
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::128579128f27016528d21c10c69b1541
https://doi.org/10.1016/j.jastp.2013.05.008
https://doi.org/10.1016/j.jastp.2013.05.008