Plasma rest frame frequencies and polarizations of the low-frequency upstream waves - ISEE 1 and 2 observations

Details Plasma rest frame frequencies and polarizations of the low-frequency upstream waves - ISEE 1 and 2 observations Plasma rest frame frequencies and polarizations of the low-frequency upstream waves - ISEE 1 and 2 observations

Mar 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.2021h&link_type=abstract

Journal of Geophysical Research, vol. 88, Mar. 1, 1983, p. 2021-2027.

Physics

151

Geomagnetism, Magnetosonic Resonance, Plasma Frequencies, Polarization Characteristics, Satellite Observation, Cyclotron Resonance, International Sun Earth Explorers, Sine Waves, Time Lag

Scientific paper

The plasma rest frame frequencies and polarizations of the large amplitude low frequency (0.03 Hz) upstream waves are investigated using magnetic field data from the dual ISEE 1 and 2 spacecraft. The monochromatic sinusoidal waves associated with intermediate ion fluxes are propagating in both the Alfven and magnetosonic modes, in both cases with typical frequencies approximately 0.1 times the local proton gyrofrequency and wavelengths of approximately 1 R(E). It is shown that the generation of the magnetosonic mode can be explained by the cyclotron resonance mechanism driven by narrow reflected ion beams, but the concurrent observation of Alfven mode waves appears to require wave generation by the more isotropic diffuse ion distributions as well.

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