Characteristics of a stable auroral red arc event

Details Characteristics of a stable auroral red arc event Characteristics of a stable auroral red arc event

Sep 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982georl...9..973k&link_type=abstract

Geophysical Research Letters, vol. 9, Sept. 1982, p. 973-976.

Physics

23

Auroral Arcs, Dynamics Explorer Satellites, Electron Precipitation, Hot Electrons, Red Arcs, Atomic Excitations, Electron Energy, Ionospheric Electron Density, Ionospheric Temperature, Oxygen Spectra

Scientific paper

The present investigation is concerned with an analysis of the measurements of the stable auroral red (SAR) arc of October 23, 1981, using data from orbit 1192 of Dynamics Explorer (DE) 2, during which a magnetic coincidence occurred with the DE-1 spacecraft near the red arc field line, and for which simultaneous ground-based intensity measurements from Richland, WA were available. The altitude of the DE-2 satellite was approximately 850 km during arc passage in the Northern Hemisphere and approximately 395 km during the conjugate hemisphere passage. The DE-1 satellite was at an altitude of approximately 6000 km during the magnetic coincidence with DE-2 in the Northern Hemisphere. The described observations and calculations reconfirm a previous understanding that the actual excitation of the O(1D) state responsible for the 6300 A emission of red arcs is caused by hot ionospheric thermal electrons.

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