First observations of SPEAR-induced artificial backscatter from CUTLASS and the EISCAT Svalbard radars
Results are presented from the first two active experimental campaigns undertaken by the new SPEAR (Space Plasma Exploration by Active Radar) high-power system that has recently become operational on Spitzbergen, in the Svalbard archipelago. SPEAR's high-power beam was used to excite artificial...
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ftleicesterunfig:oai:figshare.com:article/10096961 2023-05-15T16:04:27+02:00 First observations of SPEAR-induced artificial backscatter from CUTLASS and the EISCAT Svalbard radars T. R. Robinson Tim K. Yeoman R. S. Dhillon M. Lester E. C. Thomas J. D. Thornhill D. M. Wright A. P. van Eyken I. W. McCrea 2006-03-07T00:00:00Z https://figshare.com/articles/journal_contribution/First_observations_of_SPEAR-induced_artificial_backscatter_from_CUTLASS_and_the_EISCAT_Svalbard_radars/10096961 unknown 2381/8113 https://figshare.com/articles/journal_contribution/First_observations_of_SPEAR-induced_artificial_backscatter_from_CUTLASS_and_the_EISCAT_Svalbard_radars/10096961 All Rights Reserved Uncategorized IR content Text Journal contribution 2006 ftleicesterunfig 2021-11-11T20:10:55Z Results are presented from the first two active experimental campaigns undertaken by the new SPEAR (Space Plasma Exploration by Active Radar) high-power system that has recently become operational on Spitzbergen, in the Svalbard archipelago. SPEAR's high-power beam was used to excite artificial enhancements in the backscatter detected by the ESR (EISCAT Svalbard Radar) parallel to the geomagnetic field, as well as coherent backscatter detected by both of the CUTLASS (Co-operative UK Twin Located Auroral Sounding System) coherent radars, in directions orthogonal to the geomagnetic field. The ESR detected both enhanced ion-lines as well as enhanced plasma-lines, that were sustained for the whole period when SPEAR was transmitting ordinary mode radio waves, at frequencies below the maximum F-region plasma frequency. On a number of occasions, coherent backscatter was also observed in one or in both of the CUTLASS radars, in beams that intersected the heated volume. Although the levels of enhanced backscatter varied considerably in time, it appeared that ion-line, plasma-line and coherent backscatter were all excited simultaneously, in contrast to what has typically been reported at Tromsø, during EISCAT heater operations. A description of the technical and operational aspects of the new SPEAR system is also included. Other Non-Article Part of Journal/Newspaper EISCAT Spitzbergen Svalbard Tromsø University of Leicester: Figshare Svalbard Svalbard Archipelago Tromsø |
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University of Leicester: Figshare |
op_collection_id |
ftleicesterunfig |
language |
unknown |
topic |
Uncategorized IR content |
spellingShingle |
Uncategorized IR content T. R. Robinson Tim K. Yeoman R. S. Dhillon M. Lester E. C. Thomas J. D. Thornhill D. M. Wright A. P. van Eyken I. W. McCrea First observations of SPEAR-induced artificial backscatter from CUTLASS and the EISCAT Svalbard radars |
topic_facet |
Uncategorized IR content |
description |
Results are presented from the first two active experimental campaigns undertaken by the new SPEAR (Space Plasma Exploration by Active Radar) high-power system that has recently become operational on Spitzbergen, in the Svalbard archipelago. SPEAR's high-power beam was used to excite artificial enhancements in the backscatter detected by the ESR (EISCAT Svalbard Radar) parallel to the geomagnetic field, as well as coherent backscatter detected by both of the CUTLASS (Co-operative UK Twin Located Auroral Sounding System) coherent radars, in directions orthogonal to the geomagnetic field. The ESR detected both enhanced ion-lines as well as enhanced plasma-lines, that were sustained for the whole period when SPEAR was transmitting ordinary mode radio waves, at frequencies below the maximum F-region plasma frequency. On a number of occasions, coherent backscatter was also observed in one or in both of the CUTLASS radars, in beams that intersected the heated volume. Although the levels of enhanced backscatter varied considerably in time, it appeared that ion-line, plasma-line and coherent backscatter were all excited simultaneously, in contrast to what has typically been reported at Tromsø, during EISCAT heater operations. A description of the technical and operational aspects of the new SPEAR system is also included. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
T. R. Robinson Tim K. Yeoman R. S. Dhillon M. Lester E. C. Thomas J. D. Thornhill D. M. Wright A. P. van Eyken I. W. McCrea |
author_facet |
T. R. Robinson Tim K. Yeoman R. S. Dhillon M. Lester E. C. Thomas J. D. Thornhill D. M. Wright A. P. van Eyken I. W. McCrea |
author_sort |
T. R. Robinson |
title |
First observations of SPEAR-induced artificial backscatter from CUTLASS and the EISCAT Svalbard radars |
title_short |
First observations of SPEAR-induced artificial backscatter from CUTLASS and the EISCAT Svalbard radars |
title_full |
First observations of SPEAR-induced artificial backscatter from CUTLASS and the EISCAT Svalbard radars |
title_fullStr |
First observations of SPEAR-induced artificial backscatter from CUTLASS and the EISCAT Svalbard radars |
title_full_unstemmed |
First observations of SPEAR-induced artificial backscatter from CUTLASS and the EISCAT Svalbard radars |
title_sort |
first observations of spear-induced artificial backscatter from cutlass and the eiscat svalbard radars |
publishDate |
2006 |
url |
https://figshare.com/articles/journal_contribution/First_observations_of_SPEAR-induced_artificial_backscatter_from_CUTLASS_and_the_EISCAT_Svalbard_radars/10096961 |
geographic |
Svalbard Svalbard Archipelago Tromsø |
geographic_facet |
Svalbard Svalbard Archipelago Tromsø |
genre |
EISCAT Spitzbergen Svalbard Tromsø |
genre_facet |
EISCAT Spitzbergen Svalbard Tromsø |
op_relation |
2381/8113 https://figshare.com/articles/journal_contribution/First_observations_of_SPEAR-induced_artificial_backscatter_from_CUTLASS_and_the_EISCAT_Svalbard_radars/10096961 |
op_rights |
All Rights Reserved |
_version_ |
1766400054608789504 |