Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Pierre Cilliers"'
Autor:
Giulia D’Angelo, Mirko Piersanti, Alessio Pignalberi, Igino Coco, Paola De Michelis, Roberta Tozzi, Michael Pezzopane, Lucilla Alfonsi, Pierre Cilliers, Pietro Ubertini
Publikováno v:
Remote Sensing, Vol 13, Iss 13, p 2493 (2021)
The storm onset on 7 September 2017, triggered several variations in the ionospheric electron density, causing severe phase fluctuations at polar latitudes in both hemispheres. In addition, although quite rare at high latitudes, clear amplitude scint
Externí odkaz:
https://doaj.org/article/4d0e4fd6ed20462d9d907182f23f1ec3
Autor:
Isabelle J. Ansorge, Paul Skelton, Annie Bekker, P.J. Nico de Bruyn, Doug Butterworth, Pierre Cilliers, John Cooper, Don A. Cowan, Rosemary Dorrington, Sarah Fawcett, Susanne Fietz, Ken P. Findlay, William P. Froneman, Geoff H. Grantham, Michelle Greve, David Hedding, Greg G.J. Hofmeyr, Michael Kosch, Peter C. le Roux, Mike Lucas, Keith MacHutchon, Ian Meiklejohn, Werner Nel, Pierre Pistorius, Peter G. Ryan, Johan Stander, Sebastiaan Swart, Anne Treasure, Marcello Vichi, Bettine J. van Vuuren
Publikováno v:
South African Journal of Science, Vol 113, Iss 5/6, Pp 7-7 (2017)
Externí odkaz:
https://doaj.org/article/08f05810de2c42d5be1e52f273ca4e78
Autor:
Pierre Cilliers, Stefan Lotz
Space Weather refers to events on the Sun that have an impact on terrestrial technologies and man-made satellites. The Global Navigation Satellite System (GNSS) is extensively used for Geodesy and is subject to Space Weather impacts in several ways.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ff35ccc8ec5218230e8ebbd358a64d17
https://doi.org/10.5194/iag-comm4-2022-17
https://doi.org/10.5194/iag-comm4-2022-17
Autor:
Matthys Botha, Pierre Cilliers
Publikováno v:
IEEE Antennas and Wireless Propagation Letters. 19:997-1001
A posteriori error estimators typically approximate the locally measured error in a numerical solution. These error distributions can be used to drive adaptive mesh refinement algorithms. Goal-oriented error estimation is concerned with deriving erro
Autor:
Pierre Cilliers
Publikováno v:
Scopus-Elsevier
Autor:
Claudio, Cesaroni, Alfonsi, Lucilla, Luca, Spogli, Linty, NICOLA UMBERTO, Dovis, Fabio, Antonio, Cicone, Mirko, Piersanti, Pierre, Cilliers
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______2153::bc6538edfae572bcda363edb6e6506b1
http://hdl.handle.net/11583/2716031
http://hdl.handle.net/11583/2716031
Autor:
Pilosu, Luca, Ruiu, Pietro, Scionti, Alberto, Alfonsi, Lucilla, Luca, Spogli, Romano, Vincenzo, Dovis, Fabio, Linty, NICOLA UMBERTO, Pierre, Cilliers, Padraig, Riley, Jonathan, Ward, Emilia, Correia, Jose, Henrique, Michele, Bavaro, Curran, James T., Joaquim Fortuny Guasch
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______2153::69946c904a02ac1e38d47e041fcdfa38
http://hdl.handle.net/11583/2711699
http://hdl.handle.net/11583/2711699
Autor:
Charles Trevor Gaunt, P. B. Kotzé, Pierre Cilliers, Ben D.L. Opperman, Jim Wild, Alan Thomson, Stefan Lotz, Lee-Anne McKinnell, Chigomezyo M. Ngwira
Publikováno v:
Advances in Space Research. 45:1182-1190
Power grids and pipeline networks at all latitudes are known to be at risk from the natural hazard of geomagnetically induced cur- rents. At a recent workshop in South Africa, UK and South African scientists and engineers discussed the current unders
Publikováno v:
Advances in Space Research. 44:747-755
The International Reference Ionosphere (IRI) parameters B0 and B1 provide a representation of the thickness and shape, respectively, of the F2 layer of the bottomside ionosphere. These parameters can be derived from electron density profiles that are
Autor:
Pierre Cilliers, Chigomezyo M. Ngwira, Lee-Anne McKinnell, Endawoke Yizengaw, Ben D.L. Opperman
Publikováno v:
2011 XXXth URSI General Assembly and Scientific Symposium.
The effects of the 15 May 2005 severe geomagnetic storm on the South African ionosphere are studied using ground-based and satellite observations. Ionospheric disturbances have less frequently been investigated over mid-latitude regions. Recently, a