Statistics – Methodology
Scientific paper
Dec 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9521187o&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Dec. 1, 1990, p. 21187-21202.
Statistics
Methodology
14
Auroras, Electron Precipitation, Low Frequencies, Wave Functions, Gyrofrequency, Magnetic Field Configurations, Magnetospheric Proton Density, Satellite Observation
Scientific paper
An investigation of low-frequency waves observed on auroral field lines below the acceleration region by the Swedish satellite Viking is presented. To obtain information about the distribution of wave energy in wave vector space, the wave distribution function (WDF) is reconstructed from observed spectral densities. A new method is employed that permits simultaneous reconstruction of the WDF over a broad frequency band. This methodology also can take into account available particle observations as well as Doppler shifts caused by the relative motion between the plasma and the satellite. The distribution of energy in wave vector space suggested by the reconstructed WDF is found to be consistent with what is expected from a plasma instability driven by the observed precipitating electrons.
Oscarsson Tord E.
Ronnmark Kjell G.
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