Latitudinal density dependence of magnetic field lines inferred from Polar plasma wave data

Details Latitudinal density dependence of magnetic field lines inferred from Polar plasma wave data Latitudinal density dependence of magnetic field lines inferred from Polar plasma wave data

Apr 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001jgr...106.6195g&link_type=abstract

Journal of Geophysical Research, Volume 106, Issue A4, p. 6195-6202

Physics

37

Magnetospheric Physics: Magnetosphere-Inner, Magnetospheric Physics: Plasmasphere

Scientific paper

Using observations of the electron density ne based on measurement of the upper hybrid resonance frequency by the Polar spacecraft Plasma Wave Instrument, we have examined the radial density dependence along field lines in the outer plasmasphere and the near plasma trough. Our technique depends on the fact that Polar crosses particular L values at two different points with different radial distance R. Sampled L values range from 2.5 to 6.3. In our plasmaspheric data set (ne>=100cm-3) we find that, on average, ne is flat along field lines from the equator up to the latitudes sampled by Polar (R>~2RE). In the plasma trough data set (ne<100cm-3) there is, on average, a mild radial dependence ne~R-1.7.

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