Hostname: page-component-7bb8b95d7b-s9k8s Total loading time: 0 Render date: 2024-10-02T18:15:24.387Z Has data issue: false hasContentIssue false
  • English
  • Français

Interpretation of James' Experiments in Plasma Theory of Solar Radar Echoes

Published online by Cambridge University Press:  26 May 2016

V.N. Mel'nik
V.N. Mel'nik*
Affiliation:
Institute of Radio Astronomy, Krasnoznamyonnaya St.4, 310002, Kharkov, Ukraine

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

In the framework of the plasma theory of solar radar echoes results of the known James' experiments such as the values of effective cross-sections, the anisotropy of reflections, the spectrum of reflected signals, the heights of radar scattering and others are explained. In particular in this theory reflection of radar signal with high effective cross-sections (σ = (10 − 100)πR2⊙) occur in processes t + l ⇌ t + l on the Langmuir turbulance generated by Type III electrons at altitudes (1.4—1.6)-R⊙ when electron streams propagate towards the Earth. If the electrons move away from the Earth then the scattering cross-sections due to process t + l ⇌ t + l are small (σ < πR2⊙). Reflections from the heights up to 5R⊙ can occur at scattering of radar wave on the ion-sound turbulance (processes t + s ⇌ t) accompanied the Langmuir turbulance.

Type
Part 8: Sun and Planetary Systems
Information
Symposium - International Astronomical Union , Volume 199: The Universe at Low Radio Frequencies , 2002 , pp. 434 - 436
Copyright
Copyright © Astronomical Society of the Pacific 2002 

References

Bass, F.G. and Braude, S. Ya. 1957 Ukr. Fiz. Zh., 11, 149 Google Scholar
Chashei, I.V., and Shishov, V.I., 1994 Solar Phys. 149, 413 CrossRefGoogle Scholar
Gerasimova, N.N., 1979 Astron Zh., 56, 1303 Google Scholar
Gordon, I.M., 1973 Space Science Rev., 15, 157 Google Scholar
Gordon, I.M., 1967 Astron Tsir., N 447, 1 Google Scholar
Gordon, I.M., Liperovskii, V.A., and Tsytovich, V.N., 1971 Astron Zh., 48, 70 Google Scholar
James, J.C., 1966 ApJ, 146, 356 CrossRefGoogle Scholar
James, J.C., 1970 Mass. Inst., Center Space Research, Technic Report-70-2 Google Scholar
Kerr, F.J. 1952 Proc. Inst. Radiophys. Electr., 40, 660 Google Scholar
Mel'nik, V.N., 1998 Radiofizika i Radioastronomy, 3, 12;1998 Radiofizika i Radioastronomy, 3, 22 Google Scholar
Mei'nik, V.N. 1999 Solar Phys., 184, 363 Google Scholar
Mel'nik, V.N. 1999 Astronomy Letters, 25, 336 Google Scholar
Wentzel, D.G., 1981 ApJ, 248, 1132 Google Scholar