Computer Science – Numerical Analysis
Scientific paper
Jun 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87.4476w&link_type=abstract
Journal of Geophysical Research, vol. 87, June 1, 1982, p. 4476-4487.
Computer Science
Numerical Analysis
74
Auroral Zones, Electric Fields, Electron Energy, Ionospheric Electron Density, Kilometric Waves, Numerical Analysis, Atmospheric Models, Electron Scattering, Geomagnetism, Satellite Observation
Scientific paper
Data collected from the S3-3 spacecraft in the auroral kilometric radiation (AKR) source region are employed to form a stability theory from which numerical results are obtained and discussed. The distribution function was found to be isotropic outside the auroral atmospheric loss-cone region, which was partially filled with upcoming electrons. A parallel electric field was observed to be modifying the loss-cone distribution. A model distribution function is formulated, along with a magnetic field model expressed in terms of the electron cyclotron frequency. Models for the parallel electric field are also introduced, the first with the field distributed over a broad altitude range, while the second assumes a potential drop only above 4000 km. The presence of the field is found to enhance the growth rate of the AKR. At higher altitudes, the cutoff frequency of the X mode is affected by the rising energetic electrons. Finally, the folding distances of spatial amplification are calculated.
Gorney David J.
Lee Clarence L.
Wong Hung K.
Wu Shang-Chen
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