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Title: A comparison of EISCAT and HF Doppler observations of a ULF wave
Authors: Wright, D. M.
Yeoman, Tim K.
Davies, J. A.
First Published: 1-Oct-1998
Presented at: 8th EISCAT Scientific Workshop, UNIV LEICESTER, LEICESTER, ENGLAND
Start Date: 23-Jun-1997
End Date: 27-Jun-1997
Publisher: European Geosciences Union (EGU), Copernicus Publications, Springer Verlag (Germany)
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 first 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 field perturbation of the ULF wave and the first direct observational confirmation of a numerical simulation has been achieved. The wave, which was Alfvénic 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.
DOI Link: 10.1007/s00585-998-1190-7
ISSN: 0992-7689
eISSN: 1432-0576
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Archived with reference to SHERPA/RoMEO and publisher website. © European Geosciences Union 1998. Version of record:
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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