Initial backscatter occurrence statistics from the CUTLASS HF radars
A statistical study of the occurrence of ground and ionospheric backscatter within the fields-of-view of the CUTLASS HF radars, at an operating frequency of 10 MHz, during the first 20 months of operation has been undertaken. The diurnal variation of the occurrence of backscatter and the range at wh...
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European Geosciences Union (EGU), Copernicus Publications, Springer Verlag (Germany)
2012
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Online Access: | http://hdl.handle.net/2381/19728 http://www.ann-geophys.net/15/703/1997/angeo-15-703-1997.html https://doi.org/10.1007/s005850050486 |
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ftleicester:oai:lra.le.ac.uk:2381/19728 2023-05-15T16:51:08+02:00 Initial backscatter occurrence statistics from the CUTLASS HF radars Milan, S. E. Yeoman, T. K. Lester, M. Thomas, E. C. Jones, T. B. 2012-10-24T09:07:32Z http://hdl.handle.net/2381/19728 http://www.ann-geophys.net/15/703/1997/angeo-15-703-1997.html https://doi.org/10.1007/s005850050486 English eng European Geosciences Union (EGU), Copernicus Publications, Springer Verlag (Germany) ANNALES GEOPHYSICAE-ATMOSPHERES HYDROSPHERES AND SPACE SCIENCES, 1997, 15 (6), pp. 703-718 0992-7689 http://hdl.handle.net/2381/19728 http://www.ann-geophys.net/15/703/1997/angeo-15-703-1997.html doi:10.1007/s005850050486 1432-0576 Archived with reference to SHERPA/RoMEO and publisher website. © European Geosciences Union 1997 Version of record: http://www.ann-geophys.net/15/703/1997/angeo-15-703-1997.html Web of Science http://webofknowledge.com Science & Technology Physical Sciences Astronomy & Astrophysics Geosciences Multidisciplinary Meteorology & Atmospheric Sciences Geology SMALL-SCALE IRREGULARITIES LATITUDE F-REGION AURORAL BACKSCATTER EQUATORIAL ELECTROJET CONVECTION VELOCITY SYSTEM DRIFT Journal Article 2012 ftleicester https://doi.org/10.1007/s005850050486 2019-03-22T20:17:01Z A statistical study of the occurrence of ground and ionospheric backscatter within the fields-of-view of the CUTLASS HF radars, at an operating frequency of 10 MHz, during the first 20 months of operation has been undertaken. The diurnal variation of the occurrence of backscatter and the range at which such backscatter is observed is found to be highly dependent on seasonal changes of the ionospheric electron density in both the E and F region, determined from ionosonde observations. In general, ionospheric backscatter is observed at far ranges during the local day in winter months and at near ranges during the local night in summer months. The Iceland radar observes more near-range E region backscatter than the Finland radar as a consequence of its more zonal look-direction. The dependence of the occurrence of backscatter on geomagnetic activity and radar operating frequency are also investigated. The occurrence of ground and ionospheric backscatter is discussed in terms of HF propagation modes and ionospheric electron densities as well as geophysical processes. A brief assessment of the possible impact of solar cycle variations on the observations is made and frequency management is discussed. Such a study, with its focus on the `instrumental' aspect of backscatter occurrence, is essential for a full interpretation of HF coherent radar observations. 45545 Article in Journal/Newspaper Iceland University of Leicester: Leicester Research Archive (LRA) Annales Geophysicae 15 6 703 |
institution |
Open Polar |
collection |
University of Leicester: Leicester Research Archive (LRA) |
op_collection_id |
ftleicester |
language |
English |
topic |
Science & Technology Physical Sciences Astronomy & Astrophysics Geosciences Multidisciplinary Meteorology & Atmospheric Sciences Geology SMALL-SCALE IRREGULARITIES LATITUDE F-REGION AURORAL BACKSCATTER EQUATORIAL ELECTROJET CONVECTION VELOCITY SYSTEM DRIFT |
spellingShingle |
Science & Technology Physical Sciences Astronomy & Astrophysics Geosciences Multidisciplinary Meteorology & Atmospheric Sciences Geology SMALL-SCALE IRREGULARITIES LATITUDE F-REGION AURORAL BACKSCATTER EQUATORIAL ELECTROJET CONVECTION VELOCITY SYSTEM DRIFT Milan, S. E. Yeoman, T. K. Lester, M. Thomas, E. C. Jones, T. B. Initial backscatter occurrence statistics from the CUTLASS HF radars |
topic_facet |
Science & Technology Physical Sciences Astronomy & Astrophysics Geosciences Multidisciplinary Meteorology & Atmospheric Sciences Geology SMALL-SCALE IRREGULARITIES LATITUDE F-REGION AURORAL BACKSCATTER EQUATORIAL ELECTROJET CONVECTION VELOCITY SYSTEM DRIFT |
description |
A statistical study of the occurrence of ground and ionospheric backscatter within the fields-of-view of the CUTLASS HF radars, at an operating frequency of 10 MHz, during the first 20 months of operation has been undertaken. The diurnal variation of the occurrence of backscatter and the range at which such backscatter is observed is found to be highly dependent on seasonal changes of the ionospheric electron density in both the E and F region, determined from ionosonde observations. In general, ionospheric backscatter is observed at far ranges during the local day in winter months and at near ranges during the local night in summer months. The Iceland radar observes more near-range E region backscatter than the Finland radar as a consequence of its more zonal look-direction. The dependence of the occurrence of backscatter on geomagnetic activity and radar operating frequency are also investigated. The occurrence of ground and ionospheric backscatter is discussed in terms of HF propagation modes and ionospheric electron densities as well as geophysical processes. A brief assessment of the possible impact of solar cycle variations on the observations is made and frequency management is discussed. Such a study, with its focus on the `instrumental' aspect of backscatter occurrence, is essential for a full interpretation of HF coherent radar observations. 45545 |
format |
Article in Journal/Newspaper |
author |
Milan, S. E. Yeoman, T. K. Lester, M. Thomas, E. C. Jones, T. B. |
author_facet |
Milan, S. E. Yeoman, T. K. Lester, M. Thomas, E. C. Jones, T. B. |
author_sort |
Milan, S. E. |
title |
Initial backscatter occurrence statistics from the CUTLASS HF radars |
title_short |
Initial backscatter occurrence statistics from the CUTLASS HF radars |
title_full |
Initial backscatter occurrence statistics from the CUTLASS HF radars |
title_fullStr |
Initial backscatter occurrence statistics from the CUTLASS HF radars |
title_full_unstemmed |
Initial backscatter occurrence statistics from the CUTLASS HF radars |
title_sort |
initial backscatter occurrence statistics from the cutlass hf radars |
publisher |
European Geosciences Union (EGU), Copernicus Publications, Springer Verlag (Germany) |
publishDate |
2012 |
url |
http://hdl.handle.net/2381/19728 http://www.ann-geophys.net/15/703/1997/angeo-15-703-1997.html https://doi.org/10.1007/s005850050486 |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Web of Science http://webofknowledge.com |
op_relation |
ANNALES GEOPHYSICAE-ATMOSPHERES HYDROSPHERES AND SPACE SCIENCES, 1997, 15 (6), pp. 703-718 0992-7689 http://hdl.handle.net/2381/19728 http://www.ann-geophys.net/15/703/1997/angeo-15-703-1997.html doi:10.1007/s005850050486 1432-0576 |
op_rights |
Archived with reference to SHERPA/RoMEO and publisher website. © European Geosciences Union 1997 Version of record: http://www.ann-geophys.net/15/703/1997/angeo-15-703-1997.html |
op_doi |
https://doi.org/10.1007/s005850050486 |
container_title |
Annales Geophysicae |
container_volume |
15 |
container_issue |
6 |
container_start_page |
703 |
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1766041252236623872 |