Auroral radio absorption and the westward travelling surge

Details Auroral radio absorption and the westward travelling surge Auroral radio absorption and the westward travelling surge

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983p%26ss...31.1373c&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 31, Nov. 1983, p. 1373-1378.

Physics

9

Auroral Absorption, Electron Precipitation, High Energy Electrons, Ionospheric Propagation, Radio Auroras, Energy Spectra, Radio Attenuation, Riometers, Surges

Scientific paper

Measurements from a network of riometers during the passage of an auroral westward traveling surge are presented. These show that the energetic precipitation producing the radio absorption expands in an almost identical fashion to the softer precipitation associated with the visible surge; but it is delayed by about two minutes with respect to the surge. The delay is interpreted as a hardening of the precipitating electron spectrum as the surge goes by. Simultaneous observations of electrons at synchronous orbit are shown to support this conclusion.

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