The possibility of observing the Fresnel reflection of the sun off the atmosphere of Venus

Details The possibility of observing the Fresnel reflection of the sun off the atmosphere of Venus The possibility of observing the Fresnel reflection of the sun off the atmosphere of Venus

Jan 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976avest...9..143l&link_type=abstract

(Astronomicheskii Vestnik, vol. 9, July-Sept. 1975, p. 143-146.) Solar System Research, vol. 9, no. 3, Jan. 1976, p. 116-118. Tr

Astronomy and Astrophysics

Astronomy

Coronagraphs, Fresnel Reflectors, Solar Radiation, Venus Atmosphere, Optical Reflection, Satellite-Borne Instruments, Solar Observatories, Spaceborne Astronomy

Scientific paper

It is hypothesized that during small elongations at inferior conjunction, a substantial contribution to the radiation of Venus is made by Fresnel reflection of the sun from that planet's atmosphere. It is noted that such reflection would create a flash at earth of the order of zero magnitude. The possibility of observing this effect with ground-based and satellite-borne coronographs is considered. It is shown that a ground-based coronograph with a resolution of at least 2 sec or a satellite-borne instrument with a resolution of at least 15 sec would be required for such observations. It is suggested that a mirror reflection of the sun's image from the Venusian atmosphere could be obtained only by a spacecraft launched in the direction of Venus.-

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