Simultaneous measurements of polar cap electron distributions in opposite hemispheres

Details Simultaneous measurements of polar cap electron distributions in opposite hemispheres Simultaneous measurements of polar cap electron distributions in opposite hemispheres

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91.9007m&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, Aug. 1, 1986, p. 9007-9011. NOAA-supported research.

Other

12

Auroral Arcs, Electron Distribution, Magnetic Flux, Polar Caps, Earth Observations (From Space), Electron Precipitation, Energy Spectra, Hemispheres, Interplanetary Magnetic Fields

Scientific paper

On January 16, 1983, the NOAA 6 and NOAA 7 satellites traversed polar cap auroral arcs in the Northern Hemisphere while the DMSP-F6 satellite traversed similar polar cap arcs in the Southern Hemisphere. All of these encounters were in the morning local time sector and were made within 5 min in universal time of one another. The interplanetary magnetic field at this time had a strong northward Bz. The satellite observations of auroral electrons indicated that the precipitation exhibited a high degree of similarity, indicating a linkage between the two hemispheres. In particular, the source electron distributions, inferred from the satellite observations of precipitating electrons, were identical to within experimental error. For the comparison made when the satellites were closest to the same magnetic local time-invariant magnetic latitude locations and nearly simultaneous in universal time, the electron spectrums in the Northern and Southern Hemispheres displayed a peak near 1 keV, suggesting a common source and a similar acceleration process for these electrons.

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