HF ground scatter from the polar cap: Ionospheric propagation and ground surface effects
Identifieur interne : 001C21 ( Main/Exploration ); précédent : 001C20; suivant : 001C22HF ground scatter from the polar cap: Ionospheric propagation and ground surface effects
Auteurs : P. V. Ponomarenko [Canada] ; J. St. Maurice [Canada] ; G. C. Hussey [Canada] ; A. V. Koustov [Canada]Source :
- Journal of Geophysical Research: Space Physics [ 0148-0227 ] ; 2010-10.
Abstract
In addition to being scattered by the ionospheric field‐aligned irregularities, HF radar signals can be reflected by the ionosphere toward the Earth and then scattered back to the radar by the rugged ground surface. These ground scatter (GS) echoes are responsible for a substantial part of the returns observed by HF radars making up the Super Dual Auroral Radar Network (SuperDARN). While a GS component is conventionally used in studying ionosphere dynamics (e.g., traveling ionospheric disturbances, ULF waves), its potential in monitoring the state of the scattering surface remains largely unexploited. To fill this gap, we investigated diurnal and seasonal variation of the ground echo occurrence and location from a poleward‐looking SuperDARN radar at Rankin Inlet, Canada. Using colocated ionosonde information, we have shown that seasonal and diurnal changes in the high‐latitude ionosphere periodically modulate the overall echo occurrence rate and spatial coverage. In addition, characteristics of GS from a particular geographic location are strongly affected by the state of the underlying ground surface. We have shown that (1) ice sheets rarely produce detectable backscatter, (2) mountain ranges are the major source of GS as they can produce echoes at all seasons of the year, and (3) sea surface becomes a significant source of GS once the Arctic sea ice has melted away. Finally, we discuss how the obtained results can expand SuperDARN abilities in monitoring both the ionosphere and ground surface.
Url:
DOI: 10.1029/2010JA015828
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 000334
- to stream Istex, to step Curation: 000334
- to stream Istex, to step Checkpoint: 000608
- to stream Main, to step Merge: 001D35
- to stream Main, to step Curation: 001C21
Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">HF ground scatter from the polar cap: Ionospheric propagation and ground surface effects</title><author><name sortKey="Ponomarenko, P V" sort="Ponomarenko, P V" uniqKey="Ponomarenko P" first="P. V." last="Ponomarenko">P. V. Ponomarenko</name></author><author><name sortKey="St Maurice, J" sort="St Maurice, J" uniqKey="St Maurice J" first="J." last="St. Maurice">J. St. Maurice</name></author><author><name sortKey="Hussey, G C" sort="Hussey, G C" uniqKey="Hussey G" first="G. C." last="Hussey">G. C. Hussey</name></author><author><name sortKey="Koustov, A V" sort="Koustov, A V" uniqKey="Koustov A" first="A. V." last="Koustov">A. V. Koustov</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:1CAB9F9DB165C06DFA96393C9BAFB2691CCC79B8</idno><date when="2010" year="2010">2010</date><idno type="doi">10.1029/2010JA015828</idno><idno type="url">https://api-v5.istex.fr/document/1CAB9F9DB165C06DFA96393C9BAFB2691CCC79B8/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000334</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000334</idno><idno type="wicri:Area/Istex/Curation">000334</idno><idno type="wicri:Area/Istex/Checkpoint">000608</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">000608</idno><idno type="wicri:doubleKey">0148-0227:2010:Ponomarenko P:hf:ground:scatter</idno><idno type="wicri:Area/Main/Merge">001D35</idno><idno type="wicri:Area/Main/Curation">001C21</idno><idno type="wicri:Area/Main/Exploration">001C21</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">HF ground scatter from the polar cap: Ionospheric propagation and ground surface effects</title><author><name sortKey="Ponomarenko, P V" sort="Ponomarenko, P V" uniqKey="Ponomarenko P" first="P. V." last="Ponomarenko">P. V. Ponomarenko</name><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, Saskatchewan</wicri:regionArea><wicri:noRegion>Saskatchewan</wicri:noRegion></affiliation><affiliation wicri:level="1"><country wicri:rule="url">Canada</country></affiliation></author><author><name sortKey="St Maurice, J" sort="St Maurice, J" uniqKey="St Maurice J" first="J." last="St. Maurice">J. St. Maurice</name><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, Saskatchewan</wicri:regionArea><wicri:noRegion>Saskatchewan</wicri:noRegion></affiliation></author><author><name sortKey="Hussey, G C" sort="Hussey, G C" uniqKey="Hussey G" first="G. C." last="Hussey">G. C. Hussey</name><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, Saskatchewan</wicri:regionArea><wicri:noRegion>Saskatchewan</wicri:noRegion></affiliation></author><author><name sortKey="Koustov, A V" sort="Koustov, A V" uniqKey="Koustov A" first="A. V." last="Koustov">A. V. Koustov</name><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, Saskatchewan</wicri:regionArea><wicri:noRegion>Saskatchewan</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Geophysical Research: Space Physics</title><title level="j" type="abbrev">J. Geophys. Res.</title><idno type="ISSN">0148-0227</idno><idno type="eISSN">2156-2202</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="2010-10">2010-10</date><biblScope unit="volume">115</biblScope><biblScope unit="issue">A10</biblScope><biblScope unit="page" from="/">n/a</biblScope><biblScope unit="page" to="/">n/a</biblScope></imprint><idno type="ISSN">0148-0227</idno></series><idno type="istex">1CAB9F9DB165C06DFA96393C9BAFB2691CCC79B8</idno><idno type="DOI">10.1029/2010JA015828</idno><idno type="ArticleID">2010JA015828</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0148-0227</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">In addition to being scattered by the ionospheric field‐aligned irregularities, HF radar signals can be reflected by the ionosphere toward the Earth and then scattered back to the radar by the rugged ground surface. These ground scatter (GS) echoes are responsible for a substantial part of the returns observed by HF radars making up the Super Dual Auroral Radar Network (SuperDARN). While a GS component is conventionally used in studying ionosphere dynamics (e.g., traveling ionospheric disturbances, ULF waves), its potential in monitoring the state of the scattering surface remains largely unexploited. To fill this gap, we investigated diurnal and seasonal variation of the ground echo occurrence and location from a poleward‐looking SuperDARN radar at Rankin Inlet, Canada. Using colocated ionosonde information, we have shown that seasonal and diurnal changes in the high‐latitude ionosphere periodically modulate the overall echo occurrence rate and spatial coverage. In addition, characteristics of GS from a particular geographic location are strongly affected by the state of the underlying ground surface. We have shown that (1) ice sheets rarely produce detectable backscatter, (2) mountain ranges are the major source of GS as they can produce echoes at all seasons of the year, and (3) sea surface becomes a significant source of GS once the Arctic sea ice has melted away. Finally, we discuss how the obtained results can expand SuperDARN abilities in monitoring both the ionosphere and ground surface.</div></front></TEI><affiliations><list><country><li>Canada</li></country></list><tree><country name="Canada"><noRegion><name sortKey="Ponomarenko, P V" sort="Ponomarenko, P V" uniqKey="Ponomarenko P" first="P. V." last="Ponomarenko">P. V. Ponomarenko</name></noRegion><name sortKey="Hussey, G C" sort="Hussey, G C" uniqKey="Hussey G" first="G. C." last="Hussey">G. C. Hussey</name><name sortKey="Koustov, A V" sort="Koustov, A V" uniqKey="Koustov A" first="A. V." last="Koustov">A. V. Koustov</name><name sortKey="Ponomarenko, P V" sort="Ponomarenko, P V" uniqKey="Ponomarenko P" first="P. V." last="Ponomarenko">P. V. Ponomarenko</name><name sortKey="St Maurice, J" sort="St Maurice, J" uniqKey="St Maurice J" first="J." last="St. Maurice">J. St. Maurice</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Canada/explor/ParkinsonCanadaV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 001C21 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 001C21 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Canada
|area= ParkinsonCanadaV1
|flux= Main
|étape= Exploration
|type= RBID
|clé= ISTEX:1CAB9F9DB165C06DFA96393C9BAFB2691CCC79B8
|texte= HF ground scatter from the polar cap: Ionospheric propagation and ground surface effects
}}
| This area was generated with Dilib version V0.6.29. |  |