Development of scanning narrow beam riometer
A new riometer system of high spatial resolution by means of a scanning narrow beam method is in operation at Syowa Station, Antarctica (69.0°S, 36.6°E, L=6.1) since February 1985. Ionospheric absorption of cosmic radio noise over Syowa Station within 120km in geomagnetic north-south and east-west d...
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National Institute of Polar Research
1989
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fttriple:oai:gotriple.eu:oai:doaj.org/article:ba0880e9c215403099233569a8ab46d7 2023-05-15T13:47:19+02:00 Development of scanning narrow beam riometer Hisao Yamagishi Takashi Kikuchi 1989-03-01 https://doi.org/10.15094/00008617 https://doaj.org/article/ba0880e9c215403099233569a8ab46d7 en other eng National Institute of Polar Research doi:10.15094/00008617 0085-7289 2432-079X https://doaj.org/article/ba0880e9c215403099233569a8ab46d7 undefined Antarctic Record, Vol 33, Iss 1, Pp 17-32 (1989) geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 1989 fttriple https://doi.org/10.15094/00008617 2023-01-22T19:27:39Z A new riometer system of high spatial resolution by means of a scanning narrow beam method is in operation at Syowa Station, Antarctica (69.0°S, 36.6°E, L=6.1) since February 1985. Ionospheric absorption of cosmic radio noise over Syowa Station within 120km in geomagnetic north-south and east-west directions, can be measured with a spatial resolution of 10km and a temporal resolution of 10s. The antenna system has four other fixed-direction beams pointing to the zenith and to the magnetic north, south and west with a zenith angle of 30°. Each signal from these fixed beams, constituting a separate riometer, is used for higher time resolution (0.25s) observation. This riometer system can discriminate a small-scale absorption region of a few tens of kilometers, which cannot be seen by a conventional broad beam riometer. This riometer system can also detect a drift velocity of pulsative absorption with a short wavelength of ∿100km. Comparing simultaneous observations of this riometer and a scanning photometer at Syowa Station, we found a considerable difference in spatial distribution between auroral absorption region and auroral emission region. Article in Journal/Newspaper Antarc* Antarctica Unknown Syowa Station |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
geo |
spellingShingle |
geo Hisao Yamagishi Takashi Kikuchi Development of scanning narrow beam riometer |
topic_facet |
geo |
description |
A new riometer system of high spatial resolution by means of a scanning narrow beam method is in operation at Syowa Station, Antarctica (69.0°S, 36.6°E, L=6.1) since February 1985. Ionospheric absorption of cosmic radio noise over Syowa Station within 120km in geomagnetic north-south and east-west directions, can be measured with a spatial resolution of 10km and a temporal resolution of 10s. The antenna system has four other fixed-direction beams pointing to the zenith and to the magnetic north, south and west with a zenith angle of 30°. Each signal from these fixed beams, constituting a separate riometer, is used for higher time resolution (0.25s) observation. This riometer system can discriminate a small-scale absorption region of a few tens of kilometers, which cannot be seen by a conventional broad beam riometer. This riometer system can also detect a drift velocity of pulsative absorption with a short wavelength of ∿100km. Comparing simultaneous observations of this riometer and a scanning photometer at Syowa Station, we found a considerable difference in spatial distribution between auroral absorption region and auroral emission region. |
format |
Article in Journal/Newspaper |
author |
Hisao Yamagishi Takashi Kikuchi |
author_facet |
Hisao Yamagishi Takashi Kikuchi |
author_sort |
Hisao Yamagishi |
title |
Development of scanning narrow beam riometer |
title_short |
Development of scanning narrow beam riometer |
title_full |
Development of scanning narrow beam riometer |
title_fullStr |
Development of scanning narrow beam riometer |
title_full_unstemmed |
Development of scanning narrow beam riometer |
title_sort |
development of scanning narrow beam riometer |
publisher |
National Institute of Polar Research |
publishDate |
1989 |
url |
https://doi.org/10.15094/00008617 https://doaj.org/article/ba0880e9c215403099233569a8ab46d7 |
geographic |
Syowa Station |
geographic_facet |
Syowa Station |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Antarctic Record, Vol 33, Iss 1, Pp 17-32 (1989) |
op_relation |
doi:10.15094/00008617 0085-7289 2432-079X https://doaj.org/article/ba0880e9c215403099233569a8ab46d7 |
op_rights |
undefined |
op_doi |
https://doi.org/10.15094/00008617 |
_version_ |
1766246883626319872 |