Physics
Scientific paper
May 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979p%26ss...27..593b&link_type=abstract
Planetary and Space Science, vol. 27, May 1979, p. 593-601.
Physics
8
Equatorial Atmosphere, High Altitude, Ionospheric Ion Density, Rarefied Plasmas, Spread F, Electrostatic Probes, Electrostatic Waves, Isis Satellites, Plasma Decay
Scientific paper
Observations from the high resolution spherical electrostatic analyzer experiment aboard ISIS 1 have been used to study large amplitude irregularities at low latitudes in the topside ionosphere. The irregularities appeared as plasma depletions near the magnetic equator and were observed up to satellite apogee (3500 km). The altitude local time distribution of the depletions was such that those at altitudes greater than 2000 km were found only in the post-midnight sector. This result agrees with the predictions of a model for plasma bubbles drifting under the influence of gravity-buoyancy forces. Evidence is presented that the initial steep gradients observed at low altitudes are reduced by anomalous diffusion due to drift waves.
Burke William J.
Donatelli Delia E.
Kelley Michael C.
Sagalyn R. C.
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