A.: A comparison of EISCAT and HF Doppler observations of a ULF wave
Abstract. Since the middle of 1995, an HF Doppler sounder has been running almost continuously in northern Norway, with the receiver at Ramfjordmoen and the transmitter at Seljelvnes. Concurrent operation of the EISCAT UHF radar in common programme (CP-1) mode has made it possible to study the ionos...
Main Authors: | , , |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
1998
|
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.371.4441 http://hal.archives-ouvertes.fr/docs/00/31/64/47/PDF/angeo-16-1190-1998.pdf |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.371.4441 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.371.4441 2023-05-15T16:04:32+02:00 A.: A comparison of EISCAT and HF Doppler observations of a ULF wave D. M. Wright T. K. Yeoman J. A. Davies The Pennsylvania State University CiteSeerX Archives 1998 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.371.4441 http://hal.archives-ouvertes.fr/docs/00/31/64/47/PDF/angeo-16-1190-1998.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.371.4441 http://hal.archives-ouvertes.fr/docs/00/31/64/47/PDF/angeo-16-1190-1998.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://hal.archives-ouvertes.fr/docs/00/31/64/47/PDF/angeo-16-1190-1998.pdf text 1998 ftciteseerx 2016-01-08T01:19:41Z Abstract. Since the middle of 1995, an HF Doppler sounder has been running almost continuously in northern Norway, with the receiver at Ramfjordmoen and the transmitter at Seljelvnes. Concurrent operation of the EISCAT UHF radar in common programme (CP-1) mode has made it possible to study the ionospheric signature of a magnetospheric ULF wave. These are the ®rst results of such wave signatures observed simultaneously in both instruments. It has been demonstrated that the observed Doppler signature was mainly due to the vertical bulk motion of the ionosphere caused by the electric ®eld perturbation of the ULF wave and the ®rst direct observational con®rmation of a numerical simulation has been achieved. The wave, which was Alfve nic in nature, was detected by the instruments 8 ° equatorward of the broad resonance region. The implications for the deduced wave modes in the ionosphere and the mechanism producing the HF Doppler variations are discussed. Key words. Magnetosphere-ionosphere interactions á MHD waves and instabilities á Radio science á Ionospheric physics Text EISCAT Northern Norway Unknown Norway Ramfjordmoen ENVELOPE(19.207,19.207,69.584,69.584) Seljelvnes ENVELOPE(19.411,19.411,69.282,69.282) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
Abstract. Since the middle of 1995, an HF Doppler sounder has been running almost continuously in northern Norway, with the receiver at Ramfjordmoen and the transmitter at Seljelvnes. Concurrent operation of the EISCAT UHF radar in common programme (CP-1) mode has made it possible to study the ionospheric signature of a magnetospheric ULF wave. These are the ®rst results of such wave signatures observed simultaneously in both instruments. It has been demonstrated that the observed Doppler signature was mainly due to the vertical bulk motion of the ionosphere caused by the electric ®eld perturbation of the ULF wave and the ®rst direct observational con®rmation of a numerical simulation has been achieved. The wave, which was Alfve nic in nature, was detected by the instruments 8 ° equatorward of the broad resonance region. The implications for the deduced wave modes in the ionosphere and the mechanism producing the HF Doppler variations are discussed. Key words. Magnetosphere-ionosphere interactions á MHD waves and instabilities á Radio science á Ionospheric physics |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
D. M. Wright T. K. Yeoman J. A. Davies |
spellingShingle |
D. M. Wright T. K. Yeoman J. A. Davies A.: A comparison of EISCAT and HF Doppler observations of a ULF wave |
author_facet |
D. M. Wright T. K. Yeoman J. A. Davies |
author_sort |
D. M. Wright |
title |
A.: A comparison of EISCAT and HF Doppler observations of a ULF wave |
title_short |
A.: A comparison of EISCAT and HF Doppler observations of a ULF wave |
title_full |
A.: A comparison of EISCAT and HF Doppler observations of a ULF wave |
title_fullStr |
A.: A comparison of EISCAT and HF Doppler observations of a ULF wave |
title_full_unstemmed |
A.: A comparison of EISCAT and HF Doppler observations of a ULF wave |
title_sort |
a.: a comparison of eiscat and hf doppler observations of a ulf wave |
publishDate |
1998 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.371.4441 http://hal.archives-ouvertes.fr/docs/00/31/64/47/PDF/angeo-16-1190-1998.pdf |
long_lat |
ENVELOPE(19.207,19.207,69.584,69.584) ENVELOPE(19.411,19.411,69.282,69.282) |
geographic |
Norway Ramfjordmoen Seljelvnes |
geographic_facet |
Norway Ramfjordmoen Seljelvnes |
genre |
EISCAT Northern Norway |
genre_facet |
EISCAT Northern Norway |
op_source |
http://hal.archives-ouvertes.fr/docs/00/31/64/47/PDF/angeo-16-1190-1998.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.371.4441 http://hal.archives-ouvertes.fr/docs/00/31/64/47/PDF/angeo-16-1190-1998.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766400118840360960 |