Simultaneous observations of sun-aligned polar cap arcs in both hemispheres by EXOS-C and viking

Journal Article · Fri Jul 01 00:00:00 EDT 1988 · Geophys. Res. Lett.; (United States)

DOI:https://doi.org/10.1029/GL015i007p00713· OSTI ID:7023492

Obara, T; Kitayama, M; Mukai, T; Kaya, N; Murphree, J S; Cogger, L L

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. copyright American Geophysical Union 1988

• Research Organization: Institute of Space and Astronautical Science, Japan
• OSTI ID: 7023492
• Journal Information: Geophys. Res. Lett.; (United States), Vol. 15:7, Issue 7
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
POLAR-CAP AURORAE
ELECTRON PRECIPITATION
ENERGY SPECTRA
IMAGES
MORPHOLOGY
VIKING SPACE PROBES
AURORAE
CHARGED-PARTICLE PRECIPITATION
SPACE VEHICLES
SPECTRA
VEHICLES
640201* - Atmospheric Physics- Auroral
Ionospheric
& Magetospheric Phenomena