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| Titel |
Determination of the dispersion of low frequency waves downstream of a quasiperpendicular collisionless shock |
| VerfasserIn |
M. A. Balikhin, L. J. C. Woolliscroft, H. St. C. Alleyne, M. Dunlop, M. A. Gedalin |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 15, no. 2 ; Nr. 15, no. 2, S.143-151 |
| Datensatznummer |
250012623
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| Publikation (Nr.) |
 copernicus.org/angeo-15-143-1997.pdf |
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| Zusammenfassung |
| A method of wave mode determination, which
was announced in Balikhin and Gedalin, is applied to AMPTE UKS and AMPTE IRM
magnetic field measurements downstream of supercritical quasiperpendicular
shock. The method is based on the fact that the relation between phase
difference of the waves measured by two satellites, Doppler shift equation, the
direction of the wave propagation are enough to obtain the dispersion equation
of the observed waves. It is shown that the low frequency turbulence mainly
consists of waves observed below 1 Hz with a linear dependence between the
absolute value of wave vector |k| and the plasma frame
wave frequency. The phase velocity of these waves is close to the phase velocity
of intermediate waves Vint = Vacos(θ). |
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