Comparison of the characteristic energy of precipitating electrons derived from ground-based and DMSP satellite data
International audience Energy maps are important for ionosphere-magnetosphere coupling studies, because quantitative determination of field-aligned currents requires knowledge of the conductances and their spatial gradients. By combining imaging riometer absorption and all-sky auroral optical data i...
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ftinsu:oai:HAL:hal-00317498v1 2023-11-12T04:16:37+01:00 Comparison of the characteristic energy of precipitating electrons derived from ground-based and DMSP satellite data Ashrafi, M. Kosch, M. J. Honary, F. Department of Communications Systems 2005-01-31 https://hal.science/hal-00317498 https://hal.science/hal-00317498/document https://hal.science/hal-00317498/file/angeo-23-135-2005.pdf en eng HAL CCSD European Geosciences Union hal-00317498 https://hal.science/hal-00317498 https://hal.science/hal-00317498/document https://hal.science/hal-00317498/file/angeo-23-135-2005.pdf info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00317498 Annales Geophysicae, 2005, 23 (1), pp.135-145 [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 2005 ftinsu 2023-10-25T16:25:15Z International audience Energy maps are important for ionosphere-magnetosphere coupling studies, because quantitative determination of field-aligned currents requires knowledge of the conductances and their spatial gradients. By combining imaging riometer absorption and all-sky auroral optical data it is possible to produce high temporal and spatial resolution maps of the Maxwellian characteristic energy of precipitating electrons within a 240240 common field of view. These data have been calibrated by inverting EISCAT electron density profiles into equivalent energy spectra. In this paper energy maps produced by ground-based instruments (optical and riometer) are compared with DMSP satellite data during geomagnetic conjunctions. For the period 1995-2002, twelve satellite passes over the ground-based instruments' field of view for the cloud-free conditions have been considered. Four of the satellite conjunctions occurred during moderate geomagnetic, steady-state conditions and without any ion precipitation. In these cases with Maxwellian satellite spectra, there is 71% agreement between the characteristic energies derived from the satellite and the ground-based energy map method. Article in Journal/Newspaper EISCAT Institut national des sciences de l'Univers: HAL-INSU |
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Open Polar |
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Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
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 Ashrafi, M. Kosch, M. J. Honary, F. Comparison of the characteristic energy of precipitating electrons derived from ground-based and DMSP satellite data |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience Energy maps are important for ionosphere-magnetosphere coupling studies, because quantitative determination of field-aligned currents requires knowledge of the conductances and their spatial gradients. By combining imaging riometer absorption and all-sky auroral optical data it is possible to produce high temporal and spatial resolution maps of the Maxwellian characteristic energy of precipitating electrons within a 240240 common field of view. These data have been calibrated by inverting EISCAT electron density profiles into equivalent energy spectra. In this paper energy maps produced by ground-based instruments (optical and riometer) are compared with DMSP satellite data during geomagnetic conjunctions. For the period 1995-2002, twelve satellite passes over the ground-based instruments' field of view for the cloud-free conditions have been considered. Four of the satellite conjunctions occurred during moderate geomagnetic, steady-state conditions and without any ion precipitation. In these cases with Maxwellian satellite spectra, there is 71% agreement between the characteristic energies derived from the satellite and the ground-based energy map method. |
author2 |
Department of Communications Systems |
format |
Article in Journal/Newspaper |
author |
Ashrafi, M. Kosch, M. J. Honary, F. |
author_facet |
Ashrafi, M. Kosch, M. J. Honary, F. |
author_sort |
Ashrafi, M. |
title |
Comparison of the characteristic energy of precipitating electrons derived from ground-based and DMSP satellite data |
title_short |
Comparison of the characteristic energy of precipitating electrons derived from ground-based and DMSP satellite data |
title_full |
Comparison of the characteristic energy of precipitating electrons derived from ground-based and DMSP satellite data |
title_fullStr |
Comparison of the characteristic energy of precipitating electrons derived from ground-based and DMSP satellite data |
title_full_unstemmed |
Comparison of the characteristic energy of precipitating electrons derived from ground-based and DMSP satellite data |
title_sort |
comparison of the characteristic energy of precipitating electrons derived from ground-based and dmsp satellite data |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://hal.science/hal-00317498 https://hal.science/hal-00317498/document https://hal.science/hal-00317498/file/angeo-23-135-2005.pdf |
genre |
EISCAT |
genre_facet |
EISCAT |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00317498 Annales Geophysicae, 2005, 23 (1), pp.135-145 |
op_relation |
hal-00317498 https://hal.science/hal-00317498 https://hal.science/hal-00317498/document https://hal.science/hal-00317498/file/angeo-23-135-2005.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782333694822842368 |