Ground clutter cancellation in incoherent radars: solutions for EISCAT Svalbard radar
Incoherent scatter radars measure ionosphere parameters using modified Thomson scatter from free electrons in the target (see e.g. Hagfors, 1997). The integrated cross section of the ionospheric scatterers is extremely small and the measurements can easily be disturbed by signals returned by unwante...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.210.683 2023-05-15T16:04:33+02:00 Ground clutter cancellation in incoherent radars: solutions for EISCAT Svalbard radar T. Turunen J. Markkanen A. P. Van Eyken The Pennsylvania State University CiteSeerX Archives 2000 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.210.683 http://www.ann-geophys.net/18/1242/2000/angeo-18-1242-2000.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.210.683 http://www.ann-geophys.net/18/1242/2000/angeo-18-1242-2000.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.ann-geophys.net/18/1242/2000/angeo-18-1242-2000.pdf text 2000 ftciteseerx 2016-01-07T17:50:37Z Incoherent scatter radars measure ionosphere parameters using modified Thomson scatter from free electrons in the target (see e.g. Hagfors, 1997). The integrated cross section of the ionospheric scatterers is extremely small and the measurements can easily be disturbed by signals returned by unwanted targets. Ground clutter signals, entering via the antenna side lobes, can render measurements at the nearest target ranges totally impossible. The EISCAT Svalbard Radar (ESR), which started measurements in 1996, su€ers from severe ground clutter and the ionosphere cannot be measured in any simple manner at ranges less than about 120±150 km, depending on the modulation employed. If the target and clutter signals have di€erent, and clearly identifiable, properties then, in principle, there are always ways to eliminate the clutter. In incoherent scatter measurements, di€erences in the coherence times of the wanted and unwanted signals can be used for clutter cancellation. The clutter cancellation must be applied to all modulations, usually alternating codes in modern experiments, used for shorter ranges. Excellent results have been obtained at the ESR using a simple pulse-to-pulse clutter subtraction method, but there are also other possibilities. Text EISCAT Svalbard Unknown Hagfors ENVELOPE(13.290,13.290,65.822,65.822) Svalbard |
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ftciteseerx |
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English |
description |
Incoherent scatter radars measure ionosphere parameters using modified Thomson scatter from free electrons in the target (see e.g. Hagfors, 1997). The integrated cross section of the ionospheric scatterers is extremely small and the measurements can easily be disturbed by signals returned by unwanted targets. Ground clutter signals, entering via the antenna side lobes, can render measurements at the nearest target ranges totally impossible. The EISCAT Svalbard Radar (ESR), which started measurements in 1996, su€ers from severe ground clutter and the ionosphere cannot be measured in any simple manner at ranges less than about 120±150 km, depending on the modulation employed. If the target and clutter signals have di€erent, and clearly identifiable, properties then, in principle, there are always ways to eliminate the clutter. In incoherent scatter measurements, di€erences in the coherence times of the wanted and unwanted signals can be used for clutter cancellation. The clutter cancellation must be applied to all modulations, usually alternating codes in modern experiments, used for shorter ranges. Excellent results have been obtained at the ESR using a simple pulse-to-pulse clutter subtraction method, but there are also other possibilities. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
T. Turunen J. Markkanen A. P. Van Eyken |
spellingShingle |
T. Turunen J. Markkanen A. P. Van Eyken Ground clutter cancellation in incoherent radars: solutions for EISCAT Svalbard radar |
author_facet |
T. Turunen J. Markkanen A. P. Van Eyken |
author_sort |
T. Turunen |
title |
Ground clutter cancellation in incoherent radars: solutions for EISCAT Svalbard radar |
title_short |
Ground clutter cancellation in incoherent radars: solutions for EISCAT Svalbard radar |
title_full |
Ground clutter cancellation in incoherent radars: solutions for EISCAT Svalbard radar |
title_fullStr |
Ground clutter cancellation in incoherent radars: solutions for EISCAT Svalbard radar |
title_full_unstemmed |
Ground clutter cancellation in incoherent radars: solutions for EISCAT Svalbard radar |
title_sort |
ground clutter cancellation in incoherent radars: solutions for eiscat svalbard radar |
publishDate |
2000 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.210.683 http://www.ann-geophys.net/18/1242/2000/angeo-18-1242-2000.pdf |
long_lat |
ENVELOPE(13.290,13.290,65.822,65.822) |
geographic |
Hagfors Svalbard |
geographic_facet |
Hagfors Svalbard |
genre |
EISCAT Svalbard |
genre_facet |
EISCAT Svalbard |
op_source |
http://www.ann-geophys.net/18/1242/2000/angeo-18-1242-2000.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.210.683 http://www.ann-geophys.net/18/1242/2000/angeo-18-1242-2000.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766400145738432512 |