A comparison of velocity measurements from the CUTLASS Finland radar and the EISCAT UHF system
International audience The CUTLASS Finland radar, which comprises an integral part of the SuperDARN system of HF coherent radars, provides near continuous observations of high-latitude plasma irregularities within a field-of-view which extends over some four million square kilometres. Within the Fin...
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ftccsdartic:oai:HAL:hal-00316627v1 2023-11-12T04:16:34+01:00 A comparison of velocity measurements from the CUTLASS Finland radar and the EISCAT UHF system Davies, J. A. Lester, M. Milan, S. E. Yeoman, T. K. Department of Physics and Astronomy Leicester University of Leicester 1999 https://hal.science/hal-00316627 https://hal.science/hal-00316627/document https://hal.science/hal-00316627/file/angeo-17-892-1999.pdf en eng HAL CCSD European Geosciences Union hal-00316627 https://hal.science/hal-00316627 https://hal.science/hal-00316627/document https://hal.science/hal-00316627/file/angeo-17-892-1999.pdf info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00316627 Annales Geophysicae, 1999, 17 (7), pp.892-902 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 1999 ftccsdartic 2023-10-21T23:08:17Z International audience The CUTLASS Finland radar, which comprises an integral part of the SuperDARN system of HF coherent radars, provides near continuous observations of high-latitude plasma irregularities within a field-of-view which extends over some four million square kilometres. Within the Finland radar field-of-view lie both the EISCAT mainland and EISCAT Svalbard incoherent scatter radar facilities. Since the CUTLASS Finland radar commenced operation, in February 1995, the mainland EISCAT UHF radar has been run in common programme 1 and 2 modes for a total duration exceeding 1000 h. Simultaneous and spatially coincident returns from these two radars over this period provide the basis for a comparison of irregularity drift velocity and F-region ion velocity. Initial comparison is limited to velocities from four intervals of simultaneous radar returns; intervals are selected such that they exhibit a variety of velocity signatures including that characteristic of the convection reversal and a rapidly fluctuating velocity feature. Subsequent comparison is on a statistical basis. The velocities measured by the two systems demonstrate reasonable correspondence over the velocity regime encountered during the simultaneous occurrence of coherent and incoherent scatter; differences between the EISCAT UHF measurements of F-region ion drift and the irregularity drift velocities from the Finland radar are explained in terms of a number of contributing factors including contamination of the latter by E-region echoes, a factor which is investigated further, and the potentially deleterious effect of discrepant volume and time sampling intervals. Article in Journal/Newspaper EISCAT Svalbard Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Svalbard |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Davies, J. A. Lester, M. Milan, S. E. Yeoman, T. K. A comparison of velocity measurements from the CUTLASS Finland radar and the EISCAT UHF system |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience The CUTLASS Finland radar, which comprises an integral part of the SuperDARN system of HF coherent radars, provides near continuous observations of high-latitude plasma irregularities within a field-of-view which extends over some four million square kilometres. Within the Finland radar field-of-view lie both the EISCAT mainland and EISCAT Svalbard incoherent scatter radar facilities. Since the CUTLASS Finland radar commenced operation, in February 1995, the mainland EISCAT UHF radar has been run in common programme 1 and 2 modes for a total duration exceeding 1000 h. Simultaneous and spatially coincident returns from these two radars over this period provide the basis for a comparison of irregularity drift velocity and F-region ion velocity. Initial comparison is limited to velocities from four intervals of simultaneous radar returns; intervals are selected such that they exhibit a variety of velocity signatures including that characteristic of the convection reversal and a rapidly fluctuating velocity feature. Subsequent comparison is on a statistical basis. The velocities measured by the two systems demonstrate reasonable correspondence over the velocity regime encountered during the simultaneous occurrence of coherent and incoherent scatter; differences between the EISCAT UHF measurements of F-region ion drift and the irregularity drift velocities from the Finland radar are explained in terms of a number of contributing factors including contamination of the latter by E-region echoes, a factor which is investigated further, and the potentially deleterious effect of discrepant volume and time sampling intervals. |
author2 |
Department of Physics and Astronomy Leicester University of Leicester |
format |
Article in Journal/Newspaper |
author |
Davies, J. A. Lester, M. Milan, S. E. Yeoman, T. K. |
author_facet |
Davies, J. A. Lester, M. Milan, S. E. Yeoman, T. K. |
author_sort |
Davies, J. A. |
title |
A comparison of velocity measurements from the CUTLASS Finland radar and the EISCAT UHF system |
title_short |
A comparison of velocity measurements from the CUTLASS Finland radar and the EISCAT UHF system |
title_full |
A comparison of velocity measurements from the CUTLASS Finland radar and the EISCAT UHF system |
title_fullStr |
A comparison of velocity measurements from the CUTLASS Finland radar and the EISCAT UHF system |
title_full_unstemmed |
A comparison of velocity measurements from the CUTLASS Finland radar and the EISCAT UHF system |
title_sort |
comparison of velocity measurements from the cutlass finland radar and the eiscat uhf system |
publisher |
HAL CCSD |
publishDate |
1999 |
url |
https://hal.science/hal-00316627 https://hal.science/hal-00316627/document https://hal.science/hal-00316627/file/angeo-17-892-1999.pdf |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
EISCAT Svalbard |
genre_facet |
EISCAT Svalbard |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00316627 Annales Geophysicae, 1999, 17 (7), pp.892-902 |
op_relation |
hal-00316627 https://hal.science/hal-00316627 https://hal.science/hal-00316627/document https://hal.science/hal-00316627/file/angeo-17-892-1999.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782333618548375552 |