Initial backscatter occurrence statistics from the CUTLASS
Abstract. 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 occur-rence of backscatter and the...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.579.8563 2023-05-15T16:50:37+02:00 Initial backscatter occurrence statistics from the CUTLASS S. E. Milan T. K. Yeoman M. Lester E. C. Thomas T. B. Jones The Pennsylvania State University CiteSeerX Archives 1997 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.579.8563 http://www.ann-geophys.net/15/703/1997/angeo-15-703-1997.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.579.8563 http://www.ann-geophys.net/15/703/1997/angeo-15-703-1997.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.ann-geophys.net/15/703/1997/angeo-15-703-1997.pdf text 1997 ftciteseerx 2016-01-08T12:55:59Z Abstract. 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 occur-rence 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 geo-magnetic 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 interpr-etation of HF coherent radar observations. 1 Text Iceland Unknown |
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ftciteseerx |
language |
English |
description |
Abstract. 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 occur-rence 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 geo-magnetic 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 interpr-etation of HF coherent radar observations. 1 |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
S. E. Milan T. K. Yeoman M. Lester E. C. Thomas T. B. Jones |
spellingShingle |
S. E. Milan T. K. Yeoman M. Lester E. C. Thomas T. B. Jones Initial backscatter occurrence statistics from the CUTLASS |
author_facet |
S. E. Milan T. K. Yeoman M. Lester E. C. Thomas T. B. Jones |
author_sort |
S. E. Milan |
title |
Initial backscatter occurrence statistics from the CUTLASS |
title_short |
Initial backscatter occurrence statistics from the CUTLASS |
title_full |
Initial backscatter occurrence statistics from the CUTLASS |
title_fullStr |
Initial backscatter occurrence statistics from the CUTLASS |
title_full_unstemmed |
Initial backscatter occurrence statistics from the CUTLASS |
title_sort |
initial backscatter occurrence statistics from the cutlass |
publishDate |
1997 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.579.8563 http://www.ann-geophys.net/15/703/1997/angeo-15-703-1997.pdf |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
http://www.ann-geophys.net/15/703/1997/angeo-15-703-1997.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.579.8563 http://www.ann-geophys.net/15/703/1997/angeo-15-703-1997.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766040744987983872 |