Zobrazeno 1 - 10
of 230
pro vyhledávání: '"E.M. Warrington"'
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 228:105826
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b3af136851904b89a34c4fb122a53e50
https://doi.org/10.1016/j.jastp.2022.105826
https://doi.org/10.1016/j.jastp.2022.105826
Publikováno v:
Space Weather. 14:950-972
During Solar Proton Events (SPE), energetic protons ionize the polar mesosphere causing HF radiowave attenuation, more strongly on the dayside where the effective recombination coefficient, αeff, is low. Polar cap absorption (PCA) models predict the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2590e8249588842b3c6fe65bc449bffb
https://doi.org/10.1002/2016sw001527
https://doi.org/10.1002/2016sw001527
Autor:
N. Y. Zaalov, Farideh Honary, Donald Danskin, D. R. Siddle, E.M. Warrington, J. M. Hallam, David Boteler, A. J. Stocker, H. A. H. Al-Behadili, Neil Rogers
Publikováno v:
Radio Science. 51:1048-1059
There is a need for improved techniques for nowcasting and forecasting (over several hours) HF propagation at northerly latitudes to support airlines operating over the increasingly popular trans-polar routes. In this paper the assimilation of real-t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f743ec00fe1b8370a4ec183a267da382
https://doi.org/10.1002/2015rs005880
https://doi.org/10.1002/2015rs005880
Autor:
A. Zeqaj, Paolo Tortora, A. J. Stocker, Mattia Mercolino, G. Mariotti, D. R. Siddle, D. Silvestri, E.M. Warrington, Antonios Argyriou, Ricard Abello, J. De Vicente
Spacecraft communication systems operating at X band are strongly affected when the propagation path passes close to the Sun (which can be characterized by the Sun-Earth-Probe, SEP, angle). In this paper, a channel model that can generate a time seri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ef9e7e0ae19f014da0159bd7378ee49b
http://hdl.handle.net/11585/679178
http://hdl.handle.net/11585/679178
Autor:
D. R. Siddle, H. A. H. Al-Behadili, N. Y. Zaalov, E.M. Warrington, Farideh Honary, A. J. Stocker, Donald Danskin, David Boteler, Neil Rogers
Publikováno v:
2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS).
HF communications can be difficult in the polar regions since they are strongly influenced by space weather events. Airline communications within the polar regions rely on HF communications and improved nowcasting and forecasting techniques in suppor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a91da31d15b590362018074c738cd5c0
https://doi.org/10.23919/ursigass.2017.8104965
https://doi.org/10.23919/ursigass.2017.8104965
Autor:
N. Y. Zaalov, David Boteler, E.M. Warrington, Farideh Honary, Mathew James Beharrell, Donald Danskin, D. R. Siddle, Neil Rogers, A. J. Stocker, H. A. H. Al-Behadili
Publikováno v:
2017 Progress In Electromagnetics Research Symposium - Spring (PIERS).
Commercial airlines began operations over polar routes in 1999 with a small number of proving flights. By 2014 the number had increased to in excess of 12,000 flights per year, and further increases are expected. For safe operations, the aircraft hav
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b3bc12ab46203aad64d6a8082f0729e5
https://doi.org/10.1109/piers.2017.8262070
https://doi.org/10.1109/piers.2017.8262070
Publikováno v:
Radio Science. 48:638-645
[1] Information on delay and Doppler spreading is of importance to designers and operators of digital communication systems within the HF band since modem performance rapidly deteriorates when delay and Doppler spreads exceed system dependent thresho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ffbceaf4641ee21b29ae5e2b71577263
https://doi.org/10.1002/2013rs005264
https://doi.org/10.1002/2013rs005264
Publikováno v:
Advances in Space Research. 52:781-790
The morphology of the auroral, sub-auroral and mid-latitude trough region of the ionosphere is strongly dependent on the interplanetary magnetic field and the level of geomagnetic activity. Changes in the morphology impact on the characteristics of H
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c5314aa72591de5fbfdc81dd8b21a619
https://doi.org/10.1016/j.asr.2013.05.023
https://doi.org/10.1016/j.asr.2013.05.023
Publikováno v:
Radio Science. 48:564-572
[1] The total electron content of the ionosphere over Alert, Canada was measured continuously for over 3 years using a dual frequency GPS receiver. Peaks in the measured total electron content are attributed to the presence of convecting polar patche
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3de05b97b66279fe1e77cb637823898e
https://doi.org/10.1002/rds.20062
https://doi.org/10.1002/rds.20062
Publikováno v:
Wireless Networks. 20:89-103
Wireless mesh networks have emerged as a viable means of communicating between points that are not within wireless range of each other. There are still, however, a number of challenges involved in designing and implementing such wireless multi-hop ne
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::65eab2fca44d48ca7834ca9aba4e43bb
https://doi.org/10.1007/s11276-013-0595-8
https://doi.org/10.1007/s11276-013-0595-8