Physics
Scientific paper
Jul 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987p%26ss...35..947h&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 35, July 1987, p. 947-958. Research supported by the Sodankyla Geophysical Ob
Physics
19
D Region, Eiscat Radar System (Europe), Ionospheric Propagation, Polar Caps, Solar Protons, Goes 5, Ionospheric Electron Density, Proton Flux Density, Recombination Coefficient
Scientific paper
Electron densities were measured in the ionospheric D-region during the polar cap event of Feb. 16, 1984, and have been compared with production rates computed from proton fluxes measured on the geosynchronous satellite GOES-5. Profiles of effective recombination rate were determined which show a general consistency with previous estimates but differ in detail. There is evidence for a progressive change of recombination coefficient as the event proceeds. Calculations of the radiowave absorption profile from the EISCAT data are compared with measurements of the total radio absorption using riometers, and serve to indicate the height and thickness of the absorption region in the PCA.
Hargreaves John Keith
Ranta Aarne
Ranta Hilkka
Turunen Esa
Turunen Tauno
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