Physics
Scientific paper
Sep 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977georl...4..373p&link_type=abstract
Geophysical Research Letters, vol. 4, Sept. 1977, p. 373-376.
Physics
5
Energy Spectra, Ionospheric Electron Density, Magnetic Measurement, Photoelectrons, Spacecraft Charging, Conjugate Points, Electric Potential, Lines Of Force
Scientific paper
Simultaneous high-resolution observations of a distinctive feature in the energy spectrum of conjugate photoelectrons and spacecraft potential relative to the local ionosphere have allowed the net potential difference between magnetic conjugate points at latitudes below the region of low-energy (i.e., lower than 100 eV) auroral electron precipitation to be determined. Measurements made at 300 km from Atmosphere Explorer C show that there is normally no net potential difference between hemispheres in this region, which extended up to invariant latitudes as high as 74 deg. Two types of apparently related anomalous behavior were infrequently observed at high latitudes. During these periods the incident flux of conjugate photoelectrons was either decelerated by about 3 eV or was not detected.
Bostrom C. O.
Brace Larry H.
Doering John P.
Hanson William B.
Heelis Roderick A.
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