A comparison of satellite scintillation measurements with HF radar backscatter characteristics

We examine the correspondence between high latitude ionospheric scintillation measurements made at 250MHz with the occurrence of 10MHz HF coherent radar backscatter, on 13 and 14 December 2002. We demonstrate that when the ionospheric intersection point of the scintillation measurements is co-lo...

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Main Authors: S. E. Milan, S. Basu, T. K. Yeoman, R. E. Sheehan
Format: Article
Language:English
Published: Copernicus Publications 2005-12-01
Series:Annales Geophysicae
Online Access:https://www.ann-geophys.net/23/3451/2005/angeo-23-3451-2005.pdf
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spelling doaj-258e42c5bba043eaa27d3a75dedd31652020-11-24T22:54:20ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762005-12-01233451345510.5194/angeo-23-3451-2005A comparison of satellite scintillation measurements with HF radar backscatter characteristicsS. E. Milan0S. Basu1T. K. Yeoman2R. E. Sheehan3Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UKSpace Vehicles Directorate, Air Force Research Laboratory, Hanscom Air Force Base, Masachusetts 01731, USADepartment of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UKInstitute for Scientific Research, Boston College, Newton Center, Massachusetts 02467, USAWe examine the correspondence between high latitude ionospheric scintillation measurements made at 250MHz with the occurrence of 10MHz HF coherent radar backscatter, on 13 and 14 December 2002. We demonstrate that when the ionospheric intersection point of the scintillation measurements is co-located with significant HF radar backscatter, the observed scintillation, quantified by the S4 index, is elevated. Conversely, when the radar indicates that backscatter is observed away from the intersection point due to movements of the auroral zone, the observed scintillation is low. This suggests that scintillation is highly location-dependent, being enhanced in the auroral zone and being lower at sub-auroral latitudes. The coexistence of scintillation and HF radar backscatter, produced by ionospheric density perturbations with scale sizes of 100s of metres and ~15 m, respectively, suggests that a broad spectrum of density fluctuations is found in the auroral zone.https://www.ann-geophys.net/23/3451/2005/angeo-23-3451-2005.pdf
collection DOAJ
language English
format Article
sources DOAJ
author S. E. Milan
S. Basu
T. K. Yeoman
R. E. Sheehan
spellingShingle S. E. Milan
S. Basu
T. K. Yeoman
R. E. Sheehan
A comparison of satellite scintillation measurements with HF radar backscatter characteristics
Annales Geophysicae
author_facet S. E. Milan
S. Basu
T. K. Yeoman
R. E. Sheehan
author_sort S. E. Milan
title A comparison of satellite scintillation measurements with HF radar backscatter characteristics
title_short A comparison of satellite scintillation measurements with HF radar backscatter characteristics
title_full A comparison of satellite scintillation measurements with HF radar backscatter characteristics
title_fullStr A comparison of satellite scintillation measurements with HF radar backscatter characteristics
title_full_unstemmed A comparison of satellite scintillation measurements with HF radar backscatter characteristics
title_sort comparison of satellite scintillation measurements with hf radar backscatter characteristics
publisher Copernicus Publications
series Annales Geophysicae
issn 0992-7689
1432-0576
publishDate 2005-12-01
description We examine the correspondence between high latitude ionospheric scintillation measurements made at 250MHz with the occurrence of 10MHz HF coherent radar backscatter, on 13 and 14 December 2002. We demonstrate that when the ionospheric intersection point of the scintillation measurements is co-located with significant HF radar backscatter, the observed scintillation, quantified by the S4 index, is elevated. Conversely, when the radar indicates that backscatter is observed away from the intersection point due to movements of the auroral zone, the observed scintillation is low. This suggests that scintillation is highly location-dependent, being enhanced in the auroral zone and being lower at sub-auroral latitudes. The coexistence of scintillation and HF radar backscatter, produced by ionospheric density perturbations with scale sizes of 100s of metres and ~15 m, respectively, suggests that a broad spectrum of density fluctuations is found in the auroral zone.
url https://www.ann-geophys.net/23/3451/2005/angeo-23-3451-2005.pdf
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