Other
Scientific paper
Jan 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83..163k&link_type=abstract
Journal of Geophysical Research, vol. 83, Jan. 1, 1978, p. 163-168. Navy-supported research;
Other
Cusps, Earth Magnetosphere, Electric Field Strength, Electron Flux Density, Polar Cusps, Electron Energy, Electronic Spectra, Hawkeye Satellites, Polar Regions
Scientific paper
Correlated electric field and low-energy electron measurements are presented for two passes of Hawkeye 1 through the south polar cusp at 2000-km altitude during local morning. In one case the electric field reversal coincides with the boundary of detectable 5.2keV electron intensities and the equatorward boundary of the cusp. In the other case the electric field reversal and the 5.2 keV electron trapping boundary coincide, but the equatorward edge of the cusp as determined from the presence of 180 eV electron intensities is 5 degrees invariant latitude equatorward of the electric field reversal. It is concluded that in the second case, electron intensities associated with the polar cusp populate closed dayside field lines, and hence the corresponding equatorward edge of these electron intensities is not always an indicator of the boundary between closed dayside field lines and polar cap field lines.
Ackerson K. L.
Frank Louis A.
Gurnett Donald A.
Kintner Paul M.
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