Computer Science – Sound
Scientific paper
May 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980georl...7..393b&link_type=abstract
Geophysical Research Letters, vol. 7, May 1980, p. 393-396.
Computer Science
Sound
10
Astrophysics, Earth Magnetosphere, Interplanetary Magnetic Fields, Precipitation Particle Measurement, Satellite Sounding, Birkeland Currents, Convective Flow, Energy Spectra, Positive Ions, Spectrograms
Scientific paper
Data from Atmosphere Explorer D for periods of strong northward interplanetary magnetic field show the following characteristic behavior in the dayside magnetospheric cusp region: energy-time spectrograms of suprathermal positive ion fluxes exhibit a characteristic 'V' pattern as the spacecraft moves toward higher latitudes; that is, with the peak in the energy spectrum falling in energy and then rising again. Convection velocities follow this pattern closely with strong east-west flows (with antisunward components) occurring in the equatorward half of the 'V' and significant sunward flows occurring in the poleward half of the 'V'. These patterns can be understood qualitatively in terms of a model of ionospheric electric potential produced by the known dependence of Birkeland current densities on magnetic activity.
Burch James. L.
Fields Stanley A.
Heelis Roderick A.
Reiff Patricia H.
Spiro Robert W.
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