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Plasma Theory of Solar Radar Echoes after Thirty Years

Published online by Cambridge University Press:  30 March 2016

Valentin Mel’nik
Valentin Mel’nik*
Affiliation:
Institute of Radio Astronomy of National Academy of Sciences, 4 Chervonopraporna str., 310002, Kharkiv, Ukraine

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In 1967 Gordon made the revolutionary assumption that reflection of radar signal from the Sun can be explained by its scattering on microturbulence (Gordon 1973). In his first model it was ion-sound turbulence. Later he considered radar scattering on Langmuir turbulence. The principal opportunity to explain frequency displacements of radar echoes observed in James’ experiments (James 1966, 1970) was shown. However, it turned out (Gerasimova 1979) that the mechanism needed an impermissible high level of isotropic turbulence for the reflection with cross-sections σ = 10πR2ʘ.

Type
II. Joint Discussions
Information
Highlights of Astronomy , Volume 12: Highlights of Astronomy. As presented at the XXIVth General Assembly of the IAU, 2000 , 2002 , pp. 389
Copyright
Copyright © Astronomical Society of Pacific 2002

References

Gerasimova, N.N. 1979, Soviet Astron Zhurn., 56, 1303 Google Scholar
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James, J.C. 1970, MIT Center of Space Res. Techn. Report 70-2, 83 Google Scholar
Mel’nik, V.N. 1998, Radiofizika i Radioastronomiia, 3, 12; ibid., 3, 22 Google Scholar
Mel’nik, V.N. 1999, Solar Phys., 184, 363; Astronomy Letters, 25, 336 CrossRefGoogle Scholar