Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29x..58d&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 24, pp. 58-1, CiteID 2205, DOI 10.1029/2002GL015963
Physics
21
Magnetospheric Physics: Plasmasphere, Magnetospheric Physics: Magnetosphere-Inner, Magnetospheric Physics: Magnetospheric Configuration And Dynamics, Magnetospheric Physics: Instruments And Techniques
Scientific paper
Observations of the electron density ne based on measurement of the upper hybrid resonance frequency by the Polar spacecraft Plasma Wave Instrument (PWI) are available for March, 1996 to September, 1997, during which time the Polar orbit sampled all MLT values three times. Using this data set, we assume a power law form for the electron density dependence along field lines ne = ne0 (Rmax/R)α, where ne0 is the equatorial electron density and Rmax ~ LRE is the maximum geocentric radius R to any point on the field line, and model the statistical average of α as αmodel = 8.0 - 3.0 log10ne0 + 0.28 (log10ne0)2 - 0.43(Rmax/RE) for all categories of plasma (plasmasphere and plasmatrough), with an average error of 0.65. The data set on which this result is based is limited to 2.5RE <= Rmax <= 8.5RE, 2RE <= R <= Rmax, and 2 <= ne0 <= 1500 cm-3. There is no remaining dependence of the average α - αmodel on MLT or Kp.
Denton Richard E.
Goldstein Jeffrey Jay
Menietti Douglas J.
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