Evaluation of a method to derive ionospheric conductivities using two auroral emissions (428 and 630 nm) measured with a photometer at Tromsø (69.6°N)
Source at: http://doi.org/10.1186/s40623-017-0677-4 This paper mainly aims at evaluating capabilities of derivation of ionospheric conductivities using two principal auroral emissions (427.8 and 630 nm). We have evaluated a photometric method of derivation of ionospheric conductivities based on simu...
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ftunivtroemsoe:oai:munin.uit.no:10037/12707 2023-05-15T16:04:26+02:00 Evaluation of a method to derive ionospheric conductivities using two auroral emissions (428 and 630 nm) measured with a photometer at Tromsø (69.6°N) Adachi, K Nozawa, Satonori Ogawa, Y Brekke, Asgeir Hall, Chris Fujii, Ryochi 2017-07-03 https://hdl.handle.net/10037/12707 https://doi.org/10.1186/s40623-017-0677-4 eng eng Springer Open Earth Planets and Space Adachi, K., Nozawa, S., Ogawa, Y., Brekke, A., Hall, C. & Fujii, R. (2017). Evaluation of a method to derive ionospheric conductivities using two auroral emissions (428 and 630 nm) measured with a photometer at Tromsø (69.6°N). Earth Planets and Space. 2017;69(1) FRIDAID 1477862 doi:10.1186/s40623-017-0677-4 1343-8832 1880-5981 https://hdl.handle.net/10037/12707 openAccess VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430 VDP::Mathematics and natural science: 400::Physics: 430 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 VDP::Mathematics and natural science: 400::Geosciences: 450 Journal article Tidsskriftartikkel Peer reviewed 2017 ftunivtroemsoe https://doi.org/10.1186/s40623-017-0677-4 2021-06-25T17:55:41Z Source at: http://doi.org/10.1186/s40623-017-0677-4 This paper mainly aims at evaluating capabilities of derivation of ionospheric conductivities using two principal auroral emissions (427.8 and 630 nm). We have evaluated a photometric method of derivation of ionospheric conductivities based on simultaneous observations of a photometer (feld of view = ~1.2°), a digital camera, and the EISCAT UHF radar (feld of view = ~0.7°) operated at Tromsø, Norway (69.6°N, 19.2°E), for two nights on October 10 and 11, 2002. We have compared height-integrated Pedersen and Hall conductivities with a post-integration time of 10 s derived from EISCAT UHF radar observations and photometer observations with wavelengths of 427.8 and 630.0 nm. Sky images taken with the digital camera are utilized for distinguishing types of auroras in the views of the EISCAT UHF radar and the photometer. In general, a good agreement of temporal variations of the height-integrated Pedersen and Hall conductivities was found between EISCAT and photometer values. In cases of auroral arcs passing by in the feld of view, however, diferences in derived values between the two methods were found. Possible causes of the differences are discussed. We conclude that (1) the photometric method using 427.8 and 630 nm can capture temporal variations of the conductivities well, but unavoidable underestimations of the Pedersen (about 30–40%) and the Hall (about 50–60%) conductivities are involved, and (2) care is necessary for using photometric observational data when auroral arcs appear in the feld of view. Article in Journal/Newspaper EISCAT Tromsø University of Tromsø: Munin Open Research Archive Norway Pedersen ENVELOPE(140.013,140.013,-66.668,-66.668) Tromsø Earth, Planets and Space 69 1 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430 VDP::Mathematics and natural science: 400::Physics: 430 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 VDP::Mathematics and natural science: 400::Geosciences: 450 |
spellingShingle |
VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430 VDP::Mathematics and natural science: 400::Physics: 430 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 VDP::Mathematics and natural science: 400::Geosciences: 450 Adachi, K Nozawa, Satonori Ogawa, Y Brekke, Asgeir Hall, Chris Fujii, Ryochi Evaluation of a method to derive ionospheric conductivities using two auroral emissions (428 and 630 nm) measured with a photometer at Tromsø (69.6°N) |
topic_facet |
VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430 VDP::Mathematics and natural science: 400::Physics: 430 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 VDP::Mathematics and natural science: 400::Geosciences: 450 |
description |
Source at: http://doi.org/10.1186/s40623-017-0677-4 This paper mainly aims at evaluating capabilities of derivation of ionospheric conductivities using two principal auroral emissions (427.8 and 630 nm). We have evaluated a photometric method of derivation of ionospheric conductivities based on simultaneous observations of a photometer (feld of view = ~1.2°), a digital camera, and the EISCAT UHF radar (feld of view = ~0.7°) operated at Tromsø, Norway (69.6°N, 19.2°E), for two nights on October 10 and 11, 2002. We have compared height-integrated Pedersen and Hall conductivities with a post-integration time of 10 s derived from EISCAT UHF radar observations and photometer observations with wavelengths of 427.8 and 630.0 nm. Sky images taken with the digital camera are utilized for distinguishing types of auroras in the views of the EISCAT UHF radar and the photometer. In general, a good agreement of temporal variations of the height-integrated Pedersen and Hall conductivities was found between EISCAT and photometer values. In cases of auroral arcs passing by in the feld of view, however, diferences in derived values between the two methods were found. Possible causes of the differences are discussed. We conclude that (1) the photometric method using 427.8 and 630 nm can capture temporal variations of the conductivities well, but unavoidable underestimations of the Pedersen (about 30–40%) and the Hall (about 50–60%) conductivities are involved, and (2) care is necessary for using photometric observational data when auroral arcs appear in the feld of view. |
format |
Article in Journal/Newspaper |
author |
Adachi, K Nozawa, Satonori Ogawa, Y Brekke, Asgeir Hall, Chris Fujii, Ryochi |
author_facet |
Adachi, K Nozawa, Satonori Ogawa, Y Brekke, Asgeir Hall, Chris Fujii, Ryochi |
author_sort |
Adachi, K |
title |
Evaluation of a method to derive ionospheric conductivities using two auroral emissions (428 and 630 nm) measured with a photometer at Tromsø (69.6°N) |
title_short |
Evaluation of a method to derive ionospheric conductivities using two auroral emissions (428 and 630 nm) measured with a photometer at Tromsø (69.6°N) |
title_full |
Evaluation of a method to derive ionospheric conductivities using two auroral emissions (428 and 630 nm) measured with a photometer at Tromsø (69.6°N) |
title_fullStr |
Evaluation of a method to derive ionospheric conductivities using two auroral emissions (428 and 630 nm) measured with a photometer at Tromsø (69.6°N) |
title_full_unstemmed |
Evaluation of a method to derive ionospheric conductivities using two auroral emissions (428 and 630 nm) measured with a photometer at Tromsø (69.6°N) |
title_sort |
evaluation of a method to derive ionospheric conductivities using two auroral emissions (428 and 630 nm) measured with a photometer at tromsø (69.6°n) |
publisher |
Springer Open |
publishDate |
2017 |
url |
https://hdl.handle.net/10037/12707 https://doi.org/10.1186/s40623-017-0677-4 |
long_lat |
ENVELOPE(140.013,140.013,-66.668,-66.668) |
geographic |
Norway Pedersen Tromsø |
geographic_facet |
Norway Pedersen Tromsø |
genre |
EISCAT Tromsø |
genre_facet |
EISCAT Tromsø |
op_relation |
Earth Planets and Space Adachi, K., Nozawa, S., Ogawa, Y., Brekke, A., Hall, C. & Fujii, R. (2017). Evaluation of a method to derive ionospheric conductivities using two auroral emissions (428 and 630 nm) measured with a photometer at Tromsø (69.6°N). Earth Planets and Space. 2017;69(1) FRIDAID 1477862 doi:10.1186/s40623-017-0677-4 1343-8832 1880-5981 https://hdl.handle.net/10037/12707 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1186/s40623-017-0677-4 |
container_title |
Earth, Planets and Space |
container_volume |
69 |
container_issue |
1 |
_version_ |
1766400044722814976 |