TY - JOUR
T1 - Simultaneous observations of Sun‐aligned polar cap arcs in both hemispheres by Exos‐C and Viking
AU - Obara, Takahiro
AU - Kitayama, Masanobu
AU - Mukai, Toshifumi
AU - Kaya, Nobuyuki
AU - Murphree, J. S.
AU - Cogger, L. L.
PY - 1988/7
Y1 - 1988/7
N2 - On September 25, 1986, the EXOS‐C satellite traversed an intense electron precipitation in the southern polar cap, while the Viking satellite simultaneously obtained image data of the polar cap arc in the northern hemisphere. The energy spectrum of the precipitation, measured by instrumentation aboard EXOS‐C, was very similar to that of adjacent (typical) auroral arcs, and the precipitation in the southern polar cap was observed in the same local time sector in which the arc was found in the northern polar cap. Observations seem to support the view that the polar cap arc occurs on closed field lines and is conjugate in both hemispheres.
AB - On September 25, 1986, the EXOS‐C satellite traversed an intense electron precipitation in the southern polar cap, while the Viking satellite simultaneously obtained image data of the polar cap arc in the northern hemisphere. The energy spectrum of the precipitation, measured by instrumentation aboard EXOS‐C, was very similar to that of adjacent (typical) auroral arcs, and the precipitation in the southern polar cap was observed in the same local time sector in which the arc was found in the northern polar cap. Observations seem to support the view that the polar cap arc occurs on closed field lines and is conjugate in both hemispheres.
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U2 - 10.1029/GL015i007p00713
DO - 10.1029/GL015i007p00713
M3 - Article
AN - SCOPUS:84986356234
VL - 15
SP - 713
EP - 716
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 7
ER -