Extrapolating EISCAT Pedersen conductances to other parts of the sky using ground-based TV auroral images
Ionospheric conductivity is not very easily measured directly. Incoherent scatter radars perhaps offer the best method but can only measure at one point in the sky at any one time and are limited in their time resolution. Statistical models of average conductivity are available but these may not be...
Published in: | Annales Geophysicae |
---|---|
Main Authors: | , , |
Format: | Text |
Language: | English |
Published: |
2018
|
Subjects: | |
Online Access: | https://doi.org/10.1007/s00585-998-0583-y https://angeo.copernicus.org/articles/16/583/1998/ |
id |
ftcopernicus:oai:publications.copernicus.org:angeo34157 |
---|---|
record_format |
openpolar |
spelling |
ftcopernicus:oai:publications.copernicus.org:angeo34157 2023-05-15T16:04:41+02:00 Extrapolating EISCAT Pedersen conductances to other parts of the sky using ground-based TV auroral images Kosch, M. J. Hagfors, T. Schlegel, K. 2018-09-27 application/pdf https://doi.org/10.1007/s00585-998-0583-y https://angeo.copernicus.org/articles/16/583/1998/ eng eng doi:10.1007/s00585-998-0583-y https://angeo.copernicus.org/articles/16/583/1998/ eISSN: 1432-0576 Text 2018 ftcopernicus https://doi.org/10.1007/s00585-998-0583-y 2020-07-20T16:28:06Z Ionospheric conductivity is not very easily measured directly. Incoherent scatter radars perhaps offer the best method but can only measure at one point in the sky at any one time and are limited in their time resolution. Statistical models of average conductivity are available but these may not be applied to individual case studies such as substorms. There are many instances where a real-time estimate of ionospheric conductivity over a large field-of-view is highly desirable at a high temporal and spatial resolution. We show that it is possible to make a reasonable estimate of the noctural height-integrated Pedersen conductivity, or conductance, with a single all-sky TV camera operating at 557.7 nm. This is not so in the case of the Hall conductance where at least two auroral wavelengths should be imaged in order to estimate additionally the energy of the precipitating particles. Key words. Atmospheric composition and structure (airglow and aurora) · Magnetospheric physics (auroral phenomena · instruments and techniques) Text EISCAT Copernicus Publications: E-Journals Pedersen ENVELOPE(140.013,140.013,-66.668,-66.668) Annales Geophysicae 16 5 583 588 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
Ionospheric conductivity is not very easily measured directly. Incoherent scatter radars perhaps offer the best method but can only measure at one point in the sky at any one time and are limited in their time resolution. Statistical models of average conductivity are available but these may not be applied to individual case studies such as substorms. There are many instances where a real-time estimate of ionospheric conductivity over a large field-of-view is highly desirable at a high temporal and spatial resolution. We show that it is possible to make a reasonable estimate of the noctural height-integrated Pedersen conductivity, or conductance, with a single all-sky TV camera operating at 557.7 nm. This is not so in the case of the Hall conductance where at least two auroral wavelengths should be imaged in order to estimate additionally the energy of the precipitating particles. Key words. Atmospheric composition and structure (airglow and aurora) · Magnetospheric physics (auroral phenomena · instruments and techniques) |
format |
Text |
author |
Kosch, M. J. Hagfors, T. Schlegel, K. |
spellingShingle |
Kosch, M. J. Hagfors, T. Schlegel, K. Extrapolating EISCAT Pedersen conductances to other parts of the sky using ground-based TV auroral images |
author_facet |
Kosch, M. J. Hagfors, T. Schlegel, K. |
author_sort |
Kosch, M. J. |
title |
Extrapolating EISCAT Pedersen conductances to other parts of the sky using ground-based TV auroral images |
title_short |
Extrapolating EISCAT Pedersen conductances to other parts of the sky using ground-based TV auroral images |
title_full |
Extrapolating EISCAT Pedersen conductances to other parts of the sky using ground-based TV auroral images |
title_fullStr |
Extrapolating EISCAT Pedersen conductances to other parts of the sky using ground-based TV auroral images |
title_full_unstemmed |
Extrapolating EISCAT Pedersen conductances to other parts of the sky using ground-based TV auroral images |
title_sort |
extrapolating eiscat pedersen conductances to other parts of the sky using ground-based tv auroral images |
publishDate |
2018 |
url |
https://doi.org/10.1007/s00585-998-0583-y https://angeo.copernicus.org/articles/16/583/1998/ |
long_lat |
ENVELOPE(140.013,140.013,-66.668,-66.668) |
geographic |
Pedersen |
geographic_facet |
Pedersen |
genre |
EISCAT |
genre_facet |
EISCAT |
op_source |
eISSN: 1432-0576 |
op_relation |
doi:10.1007/s00585-998-0583-y https://angeo.copernicus.org/articles/16/583/1998/ |
op_doi |
https://doi.org/10.1007/s00585-998-0583-y |
container_title |
Annales Geophysicae |
container_volume |
16 |
container_issue |
5 |
container_start_page |
583 |
op_container_end_page |
588 |
_version_ |
1766400299890638848 |