A comparison of radio star scintillations at 1390 and 79 Mc/s at low angles of elevation

Details A comparison of radio star scintillations at 1390 and 79 Mc/s at low angles of elevation A comparison of radio star scintillations at 1390 and 79 Mc/s at low angles of elevation

Jul 1962

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1962jatp...24..573c&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 24, no. 7, pp. 573-584

Physics

1

Scientific paper

Observations of radio star scintillations have been made on a radio frequency of 1390 Mc/s. Evidence is presented which indicates that they are ionospheric in origin and a value of 100 km has been set for the altitude at which the scintillations are impressed upon the incoming radio waves. The 1390 Mc/s records have been compared with routine 79 Mc/s scintillation records and it is found that the theoretical laws governing the variation of scintillation amplitude with observing frequency do not hold over this large frequency range. This cannot be explained in terms of a diffraction effect and it is suggested that the breakdown is due to absorption of 79 Mc/s radiation from sources at low angles of elevation.

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