First observation of the anomalous electric field in the topside ionosphere by ionospheric modification over EISCAT
We have developed an active ground-based technique to estimate the steady state field-aligned anomalous electric field (E*) in the topside ionosphere, up to ~600 km, using the European Incoherent Scatter (EISCAT) ionospheric modification facility and UHF incoherent scatter radar. When pumping the io...
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ftulancaster:oai:eprints.lancs.ac.uk:71797 2023-08-27T04:09:13+02:00 First observation of the anomalous electric field in the topside ionosphere by ionospheric modification over EISCAT Kosch, Michael Vickers, H. Ogawa, Y. Senior, Andrew Blagoveshchenskaya, N. F. 2014-11-16 https://eprints.lancs.ac.uk/id/eprint/71797/ https://doi.org/10.1002/2014GL061679 unknown Kosch, Michael and Vickers, H. and Ogawa, Y. and Senior, Andrew and Blagoveshchenskaya, N. F. (2014) First observation of the anomalous electric field in the topside ionosphere by ionospheric modification over EISCAT. Geophysical Research Letters, 41 (21). pp. 7427-7435. ISSN 0094-8276 Journal Article PeerReviewed 2014 ftulancaster https://doi.org/10.1002/2014GL061679 2023-08-03T22:26:56Z We have developed an active ground-based technique to estimate the steady state field-aligned anomalous electric field (E*) in the topside ionosphere, up to ~600 km, using the European Incoherent Scatter (EISCAT) ionospheric modification facility and UHF incoherent scatter radar. When pumping the ionosphere with high-power high-frequency radio waves, the F region electron temperature is significantly raised, increasing the plasma pressure gradient in the topside ionosphere, resulting in ion upflow along the magnetic field line. We estimate E* using a modified ion momentum equation and the Mass Spectrometer Incoherent Scatter model. From an experiment on 23 October 2013, E* points downward with an average amplitude of ~1.6 μV/m, becoming weaker at higher altitudes. The mechanism for anomalous resistivity is thought to be low-frequency ion acoustic waves generated by the pump-induced flux of suprathermal electrons. These high-energy electrons are produced near the pump wave reflection altitude by plasma resonance and also result in observed artificially induced optical emissions. Article in Journal/Newspaper EISCAT Lancaster University: Lancaster Eprints Geophysical Research Letters 41 21 7427 7435 |
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Open Polar |
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Lancaster University: Lancaster Eprints |
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ftulancaster |
language |
unknown |
description |
We have developed an active ground-based technique to estimate the steady state field-aligned anomalous electric field (E*) in the topside ionosphere, up to ~600 km, using the European Incoherent Scatter (EISCAT) ionospheric modification facility and UHF incoherent scatter radar. When pumping the ionosphere with high-power high-frequency radio waves, the F region electron temperature is significantly raised, increasing the plasma pressure gradient in the topside ionosphere, resulting in ion upflow along the magnetic field line. We estimate E* using a modified ion momentum equation and the Mass Spectrometer Incoherent Scatter model. From an experiment on 23 October 2013, E* points downward with an average amplitude of ~1.6 μV/m, becoming weaker at higher altitudes. The mechanism for anomalous resistivity is thought to be low-frequency ion acoustic waves generated by the pump-induced flux of suprathermal electrons. These high-energy electrons are produced near the pump wave reflection altitude by plasma resonance and also result in observed artificially induced optical emissions. |
format |
Article in Journal/Newspaper |
author |
Kosch, Michael Vickers, H. Ogawa, Y. Senior, Andrew Blagoveshchenskaya, N. F. |
spellingShingle |
Kosch, Michael Vickers, H. Ogawa, Y. Senior, Andrew Blagoveshchenskaya, N. F. First observation of the anomalous electric field in the topside ionosphere by ionospheric modification over EISCAT |
author_facet |
Kosch, Michael Vickers, H. Ogawa, Y. Senior, Andrew Blagoveshchenskaya, N. F. |
author_sort |
Kosch, Michael |
title |
First observation of the anomalous electric field in the topside ionosphere by ionospheric modification over EISCAT |
title_short |
First observation of the anomalous electric field in the topside ionosphere by ionospheric modification over EISCAT |
title_full |
First observation of the anomalous electric field in the topside ionosphere by ionospheric modification over EISCAT |
title_fullStr |
First observation of the anomalous electric field in the topside ionosphere by ionospheric modification over EISCAT |
title_full_unstemmed |
First observation of the anomalous electric field in the topside ionosphere by ionospheric modification over EISCAT |
title_sort |
first observation of the anomalous electric field in the topside ionosphere by ionospheric modification over eiscat |
publishDate |
2014 |
url |
https://eprints.lancs.ac.uk/id/eprint/71797/ https://doi.org/10.1002/2014GL061679 |
genre |
EISCAT |
genre_facet |
EISCAT |
op_relation |
Kosch, Michael and Vickers, H. and Ogawa, Y. and Senior, Andrew and Blagoveshchenskaya, N. F. (2014) First observation of the anomalous electric field in the topside ionosphere by ionospheric modification over EISCAT. Geophysical Research Letters, 41 (21). pp. 7427-7435. ISSN 0094-8276 |
op_doi |
https://doi.org/10.1002/2014GL061679 |
container_title |
Geophysical Research Letters |
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41 |
container_issue |
21 |
container_start_page |
7427 |
op_container_end_page |
7435 |
_version_ |
1775350379023695872 |