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...
Published in: | Annales Geophysicae |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications on behalf of the European Geosciences Union (EGU)
2010
|
Subjects: | |
Online Access: | http://www.ann-geophys.net/24/291/2006/ http://hdl.handle.net/2381/8113 https://doi.org/10.5194/angeo-24-291-2006 |
id |
ftleicester:oai:lra.le.ac.uk:2381/8113 |
---|---|
record_format |
openpolar |
spelling |
ftleicester:oai:lra.le.ac.uk:2381/8113 2023-05-15T16:04:27+02:00 First observations of SPEAR-induced artificial backscatter from CUTLASS and the EISCAT Svalbard radars Robinson, T. R. Yeoman, Tim K. Dhillon, R. S. Lester, M. Thomas, E. C. Thornhill, J. D. Wright, D. M. van Eyken, A. P. McCrea, I. W. 2010-06-28T14:28:07Z http://www.ann-geophys.net/24/291/2006/ http://hdl.handle.net/2381/8113 https://doi.org/10.5194/angeo-24-291-2006 en eng Copernicus Publications on behalf of the European Geosciences Union (EGU) Radio and Space Plasma Physics Annales Geophysicae, 2006, 24 (1), pp. 291-309. 0992-7689 http://www.ann-geophys.net/24/291/2006/ http://hdl.handle.net/2381/8113 doi:10.5194/angeo-24-291-2006 This paper was published as Annales Geophysicae, 2006, 24 (1), pp. 291-309. It is also available from http://www.ann-geophys.net/24/291/2006/angeo-24-291-2006.html. Doi:10.5194/angeo-24-291-2006 © Author(s) 2006. This work is distributed under the Creative Commons Attribution 3.0 License. CC-BY Article 2010 ftleicester https://doi.org/10.5194/angeo-24-291-2006 2019-03-22T20:14:12Z 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. Article in Journal/Newspaper EISCAT Spitzbergen Svalbard Tromsø University of Leicester: Leicester Research Archive (LRA) Svalbard Svalbard Archipelago Tromsø Annales Geophysicae 24 1 291 309 |
institution |
Open Polar |
collection |
University of Leicester: Leicester Research Archive (LRA) |
op_collection_id |
ftleicester |
language |
English |
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 |
Article in Journal/Newspaper |
author |
Robinson, T. R. Yeoman, Tim K. Dhillon, R. S. Lester, M. Thomas, E. C. Thornhill, J. D. Wright, D. M. van Eyken, A. P. McCrea, I. W. |
spellingShingle |
Robinson, T. R. Yeoman, Tim K. Dhillon, R. S. Lester, M. Thomas, E. C. Thornhill, J. D. Wright, D. M. van Eyken, A. P. McCrea, I. W. First observations of SPEAR-induced artificial backscatter from CUTLASS and the EISCAT Svalbard radars |
author_facet |
Robinson, T. R. Yeoman, Tim K. Dhillon, R. S. Lester, M. Thomas, E. C. Thornhill, J. D. Wright, D. M. van Eyken, A. P. McCrea, I. W. |
author_sort |
Robinson, T. R. |
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 |
publisher |
Copernicus Publications on behalf of the European Geosciences Union (EGU) |
publishDate |
2010 |
url |
http://www.ann-geophys.net/24/291/2006/ http://hdl.handle.net/2381/8113 https://doi.org/10.5194/angeo-24-291-2006 |
geographic |
Svalbard Svalbard Archipelago Tromsø |
geographic_facet |
Svalbard Svalbard Archipelago Tromsø |
genre |
EISCAT Spitzbergen Svalbard Tromsø |
genre_facet |
EISCAT Spitzbergen Svalbard Tromsø |
op_relation |
Radio and Space Plasma Physics Annales Geophysicae, 2006, 24 (1), pp. 291-309. 0992-7689 http://www.ann-geophys.net/24/291/2006/ http://hdl.handle.net/2381/8113 doi:10.5194/angeo-24-291-2006 |
op_rights |
This paper was published as Annales Geophysicae, 2006, 24 (1), pp. 291-309. It is also available from http://www.ann-geophys.net/24/291/2006/angeo-24-291-2006.html. Doi:10.5194/angeo-24-291-2006 © Author(s) 2006. This work is distributed under the Creative Commons Attribution 3.0 License. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/angeo-24-291-2006 |
container_title |
Annales Geophysicae |
container_volume |
24 |
container_issue |
1 |
container_start_page |
291 |
op_container_end_page |
309 |
_version_ |
1766400055605985280 |