Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976sva....19..723b&link_type=abstract
(Astronomicheskii Zhurnal, vol. 52, Nov.-Dec. 1975, p. 1206-1213.) Soviet Astronomy, vol. 19, no. 6, 1976, p. 723-726. Translat
Astronomy and Astrophysics
Astronomy
Decametric Waves, Lunar Occultation, Radio Sources (Astronomy), Atmospheric Refraction, Binary Stars, Computer Techniques, Ionospheric Propagation, Resolution
Scientific paper
Techniques for observing lunar occultations of radio sources at decametric wavelengths are described along with a procedure for computer processing of the observational data. It is noted that irregular refraction by the earth's ionosphere limits the resolution of decametric observations and that observations of lunar occultations at such wavelengths can be used to determine whether radio waves are refracted by the lunar atmosphere. Results are then presented for observations of a lunar occultation of the radio source 3C 312 at 20 and 25 MHz. It is shown that 3C 312 is a double source with an angular separation of approximately 70 arcsec between the two components. No noticeable refraction by the lunar atmosphere was observed.
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