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Aspect angle dependence of the E region irregularity velocity at large flow angles

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Aspect angle dependence of the E region irregularity velocity at large flow angles. / Makarevich, R. A.; Koustov, A. V.; Senior, Andrew et al.
In: Journal of Geophysical Research, Vol. 112, 11.2007, p. A11303.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Makarevich, RA, Koustov, AV, Senior, A, Uspensky, M, Honary, F & Dyson, PL 2007, 'Aspect angle dependence of the E region irregularity velocity at large flow angles', Journal of Geophysical Research, vol. 112, pp. A11303. https://doi.org/10.1029/2007JA012342

APA

Makarevich, R. A., Koustov, A. V., Senior, A., Uspensky, M., Honary, F., & Dyson, P. L. (2007). Aspect angle dependence of the E region irregularity velocity at large flow angles. Journal of Geophysical Research, 112, A11303. https://doi.org/10.1029/2007JA012342

Vancouver

Makarevich RA, Koustov AV, Senior A, Uspensky M, Honary F, Dyson PL. Aspect angle dependence of the E region irregularity velocity at large flow angles. Journal of Geophysical Research. 2007 Nov;112:A11303. doi: 10.1029/2007JA012342

Author

Makarevich, R. A. ; Koustov, A. V. ; Senior, Andrew et al. / Aspect angle dependence of the E region irregularity velocity at large flow angles. In: Journal of Geophysical Research. 2007 ; Vol. 112. pp. A11303.

Bibtex

@article{da3d3817a4964608903d12b86c4f2fc5,
title = "Aspect angle dependence of the E region irregularity velocity at large flow angles",
abstract = "We present the Doppler velocity observations of 1-m plasma waves in the auroral E region by the Scandinavian Twin Auroral Radar Experiment (STARE) Norway VHF coherent radar in the context of simultaneous and coincident measurements of electron and ion drift velocities determined by the European Incoherent Scatter (EISCAT) tristatic radar facility. The measurements were performed in the afternoon sector (1500–2000 MLT) at seven locations along the STARE radar beam 2 with different values of the magnetic off-perpendicular (aspect) angle α between 0.48° and 2.63° and at large angles with respect to the electron background drift ( = 55°–90°). It is demonstrated that the STARE line-of-sight velocity, normalized to the EISCAT-derived electron drift speed at large flow angles, exhibits a decrease with increasing aspect angle, and the rate of decrease is investigated as a function of the flow angle. We also compare the STARE velocity with the electron and ion drift velocity components along the STARE radar beam look direction and show that, at large aspect angles, the E region velocity is correlated (anticorrelated) with the ion (electron) drift velocity component. The results are discussed in the contexts of the linear fluid theory of the modified two-stream plasma instability and the theory of anomalous collisions.",
keywords = "stare, eiscat DCS-publications-id, art-870, DCS-publications-credits, iono, DCS-publications-personnel-id, 51, 5, 81",
author = "Makarevich, {R. A.} and Koustov, {A. V.} and Andrew Senior and M. Uspensky and Farideh Honary and Dyson, {P. L.}",
note = "Copyright (2007) American Geophysical Union. Further reproduction or electronic distribution is not permitted",
year = "2007",
month = nov,
doi = "10.1029/2007JA012342",
language = "English",
volume = "112",
pages = "A11303",
journal = "Journal of Geophysical Research",
issn = "0148-0227",
publisher = "American Geophysical Union",

}

RIS

TY - JOUR

T1 - Aspect angle dependence of the E region irregularity velocity at large flow angles

AU - Makarevich, R. A.

AU - Koustov, A. V.

AU - Senior, Andrew

AU - Uspensky, M.

AU - Honary, Farideh

AU - Dyson, P. L.

N1 - Copyright (2007) American Geophysical Union. Further reproduction or electronic distribution is not permitted

PY - 2007/11

Y1 - 2007/11

N2 - We present the Doppler velocity observations of 1-m plasma waves in the auroral E region by the Scandinavian Twin Auroral Radar Experiment (STARE) Norway VHF coherent radar in the context of simultaneous and coincident measurements of electron and ion drift velocities determined by the European Incoherent Scatter (EISCAT) tristatic radar facility. The measurements were performed in the afternoon sector (1500–2000 MLT) at seven locations along the STARE radar beam 2 with different values of the magnetic off-perpendicular (aspect) angle α between 0.48° and 2.63° and at large angles with respect to the electron background drift ( = 55°–90°). It is demonstrated that the STARE line-of-sight velocity, normalized to the EISCAT-derived electron drift speed at large flow angles, exhibits a decrease with increasing aspect angle, and the rate of decrease is investigated as a function of the flow angle. We also compare the STARE velocity with the electron and ion drift velocity components along the STARE radar beam look direction and show that, at large aspect angles, the E region velocity is correlated (anticorrelated) with the ion (electron) drift velocity component. The results are discussed in the contexts of the linear fluid theory of the modified two-stream plasma instability and the theory of anomalous collisions.

AB - We present the Doppler velocity observations of 1-m plasma waves in the auroral E region by the Scandinavian Twin Auroral Radar Experiment (STARE) Norway VHF coherent radar in the context of simultaneous and coincident measurements of electron and ion drift velocities determined by the European Incoherent Scatter (EISCAT) tristatic radar facility. The measurements were performed in the afternoon sector (1500–2000 MLT) at seven locations along the STARE radar beam 2 with different values of the magnetic off-perpendicular (aspect) angle α between 0.48° and 2.63° and at large angles with respect to the electron background drift ( = 55°–90°). It is demonstrated that the STARE line-of-sight velocity, normalized to the EISCAT-derived electron drift speed at large flow angles, exhibits a decrease with increasing aspect angle, and the rate of decrease is investigated as a function of the flow angle. We also compare the STARE velocity with the electron and ion drift velocity components along the STARE radar beam look direction and show that, at large aspect angles, the E region velocity is correlated (anticorrelated) with the ion (electron) drift velocity component. The results are discussed in the contexts of the linear fluid theory of the modified two-stream plasma instability and the theory of anomalous collisions.

KW - stare

KW - eiscat DCS-publications-id

KW - art-870

KW - DCS-publications-credits

KW - iono

KW - DCS-publications-personnel-id

KW - 51

KW - 5

KW - 81

U2 - 10.1029/2007JA012342

DO - 10.1029/2007JA012342

M3 - Journal article

VL - 112

SP - A11303

JO - Journal of Geophysical Research

JF - Journal of Geophysical Research

SN - 0148-0227

ER -