Directional features of the downshifted peak observed in HF-induced stimulated electromagnetic emission spectra obtained using an interferometer.

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Directional features of the downshifted peak observed in HF-induced stimulated electromagnetic emission spectra obtained using an interferometer.

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dc.contributor.author Tereshchenko, E.D.
dc.contributor.author Rietveld, Michael T.
dc.contributor.author Belyey, Vasyl
dc.contributor.author Yurik, R.Yu
dc.contributor.author Brekke, Asgeir
dc.contributor.author Khudukon, B.Z.
dc.contributor.author Isham, B.
dc.contributor.author Hagfors, T.
dc.contributor.author Grill, M.
dc.date.accessioned 2007-01-31T13:17:56Z
dc.date.available 2007-01-31T13:17:56Z
dc.date.issued 2006-08-09
dc.description.abstract A high frequency (HF) ionospheric modification experiment was carried out between 25 September and 8 October 2004, using the EISCAT HF transmitter located near Tromsø, Norway. During this experiment the spectra of the stimulated HF sideband waves (stimulated electromagnetic emission or SEE) induced by the HF pump were observed using an interferometer consisting of three spaced receiving antennas with baselines both along and perpendicular to the meridian, and a multi-channel coherent receiver, installed in the vicinity of the HF facility. The transmitter operated at 4040kHz and its antenna beam was scanned to angles of 0°, 7°, 14°, and 21° south from vertical, pausing 4min at each position. This paper focuses on features of the downshifted peak (DP) emission, which has not been as thoroughly studied as many of the other SEE spectral features observable within the EISCAT pump frequency range. It was found that the signal-weighted direction of the DP source region remained within 5° of magnetic zenith as the HF beam was tilted between 0 and 21° south of vertical.
dc.format.extent 450915 bytes
dc.format.mimetype application/pdf
dc.identifier.issn 1432-0576 (elektronisk)
dc.identifier.uri http://hdl.handle.net/10037/588
dc.identifier.urn URN:NBN:no-uit_munin_411
dc.language.iso eng
dc.publisher European Geosciences Union
dc.relation.ispartofseries Annales Geophysicae 24(2006), pp 1819-1827
dc.subject VDP::Matematikk og naturvitenskap: 400::Fysikk: 430::Rom- og plasmafysikk: 437
dc.subject Ionosphere
dc.subject active experiments
dc.subject plasma waves and instabilities
dc.subject space plasma physics
dc.subject nonlinear phenomena
dc.title Directional features of the downshifted peak observed in HF-induced stimulated electromagnetic emission spectra obtained using an interferometer.
dc.type Journal article
dc.type Peer reviewed


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