Abstract
The annual average values of the solar wind velocity over the period 1962–1972 were investigated on the basis of data obtained from different space probes. The comparison of the pattern of the annual average solar wind velocities observed by the Vela and Pioneer 6 satellites indicates that the pattern presented by Gosling et al. (1971) is realistic. The long-range trend in the solar wind velocity during the 11-year cycle is governed by the number and intensity of irregularities occurring in the corona. These irregularities may represent motions of mass or some types of MHD shock waves and they are responsible for the increased heating of the corona which then in turn causes an increase in the values of the solar radar cross-section and of the solar wind velocity. A close relation is demonstrated between the monthly and annual average values of the solar wind velocity and of the cross-section.
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References
Bame, S. J., Felthauser, H. E., Hundhausen, A. J., Strong, I. B., Asbridge, J. R., Gilbert, H. E., Smith, D. M., and Sydoriak, S. J.: 1970, A Compilation of Vela 3 Solar Wind Observations, 1965 to 1961, LA-4536, Vol. 1.
Cuperman, S. and Sternlieb, A.: 1972, Solar Phys. 25, 493.
Dodson, H. W. and Hedeman, E. R.: 1971, Report UAG-14, NOAA Boulder.
Gordon, J. H.: 1971, in A. C. Stickland (ed.), Space Research XI, Akademie-Verlag GmbH, Berlin, p. 1201.
Gosling, J. T., Hansen, R. T., and Bame, S. J.: 1971, J. Geophys. Res. 76, 1811.
Hundhausen, A. J.: 1972, in J. G. Roederer (ed.), Physics and Chemistry in Space 5.
James, J. C.: 1966, Astrophys. J. 146, 356.
James, J. C.: 1968, in I. V. Evans and T. Hagfors (eds.), Radar Astronomy, McGraw-Hill, New York, p. 323.
James, J. C.: 1970, Solar Phys. 12, 143.
Lazarus, A. J., Heinemann, M. A., McKinnis, R. W., and Bridge, H. S.: 1973, ‘Solar Wind Data from the MIT Plasma Experiments on Pioneer 6 and Pioneer 7’, NSSDC 73-08.
Moreno, G., Signorini, C., and Formisano, V.: 1973, Preprint.
Neugebauer, M. and Snyder, C. W.: 1966, J. Geophys. Res. 71, 4469.
Olbert, S.: 1968 in R. L. Carovillano, J. F. McClay, and H. R. Radoski (eds.), Physics of the Magnetosphere, D. Reidel Publ. Co., Dordrecht-Holland, p. 641.
Pathak, P. N.: 1971, Solar Phys. 20, 462.
Pathak, P. N. and Sarabhai, V.: 1970, Planetary Space Sci. 18, 81.
Pintér, S.: 1973, Nature Physical Sci. 243, 96.
Pintér, S. 1974, to appear in Astrophys. Space Sci.
Pintér, S. 1974, to appear in Astrophys. Letters.
Wang, J. R.: 1970, Astrophys. J. 160, 261.
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Pintér, S. The solar wind velocity in the eleven-year cycle no. 20 and the solar radar cross-section. Sol Phys 35, 225–232 (1974). https://doi.org/10.1007/BF00156969
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DOI: https://doi.org/10.1007/BF00156969