Computer Science
Scientific paper
Dec 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976natur.264..421s&link_type=abstract
Nature, vol. 264, Dec. 2, 1976, p. 421-423. Research supported by the Science Research Council and ERDA.
Computer Science
5
Argon, Earth Albedo, Earth Atmosphere, Radiant Flux Density, Solar Flares, X Ray Fluorescence, Ariel 5 Satellite, Atmospheric Composition, Energy Spectra, Proportional Counters, Solar X-Rays, X Ray Scattering
Scientific paper
A strong flux of X rays coming from the sunlit earth during two large solar flares has been detected with the aid of a proportional counter carried by the satellite Ariel 5. These albedo X rays are proportional to the solar X-ray flux and consist of scattered X rays and a strong fluorescent line at 3 keV from atmospheric argon. There is also a weaker line at about 7 keV. Ariel 5 is in a near equatorial orbit with inclination 2.9 deg, apogee and perigee 543 and 501 km, and period 102 min.
Horton Brendan
Pollard G.
Sanford Peter W.
Seward Frederick D.
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