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Measurement of magnetic field aligned potential differences using high resolution conjugate photoelectron energy spectraSimultaneous 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.
Document ID
19770066429
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Peterson, W. K.
(Johns Hopkins Univ. Baltimore, MD, United States)
Doering, J. P.
(Johns Hopkins University Baltimore, Md., United States)
Potemra, T. A.
(Johns Hopkins Univ. Baltimore, MD, United States)
Bostrom, C. O.
(Johns Hopkins University Laurel, Md., United States)
Brace, L. H.
(NASA Goddard Space Flight Center Greenbelt, Md., United States)
Heelis, R. A.
(Johns Hopkins Univ. Baltimore, MD, United States)
Hanson, W. B.
(Texas, University Richardson, Tex., United States)
Date Acquired
August 9, 2013
Publication Date
September 1, 1977
Publication Information
Publication: Geophysical Research Letters
Volume: 4
Subject Category
Geophysics
Accession Number
77A49281
Funding Number(s)
CONTRACT_GRANT: NAS5-11415
CONTRACT_GRANT: NAS5-11407
Distribution Limits
Public
Copyright
Other

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