Computer Science – Sound
Scientific paper
Mar 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980p%26ss...28..245f&link_type=abstract
Planetary and Space Science, vol. 28, Mar. 1980, p. 245-257.
Computer Science
Sound
1
Boundary Layer Plasmas, Electron Energy, Energy Spectra, Heos Satellites, Ionospheric Sounding, Magnetopause, Magnetosheath, Polar Regions, Satellite Observation, Tropical Regions
Scientific paper
Observations of the plasma sheet and of the adjacent boundary layer of HEOS-2 low latitude and high latitude passes are used to characterize the boundary layer by the electron energy spectra, from the magnetopause to the ionosphere. Three different magnetospheric low-energy electron populations have been identified: the first type is very similar to the magnetosheath energy spectrum, that is, cold electrons with energy lower than 100 eV; a second type shows warm electrons (energy between 100 and 300 eV), and the third type has a peak at or above 1 keV. The three electron populations are mapped from the magnetopause down to the high-latitude near-earth regions. The boundary layer extends along the magnetopause up to 5-7 earth radii above the equator; at higher latitudes it follows the magnetic lines of force and is found closer and closer to the earth; therefore, it has the same invariant latitudes of the system 1 currents observed by Iijima and Potemra (1976) in their region 1.
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