Abstract
Solar wind plasma and magnetic field measurements from Pioneers 9 and 10 during August 2–17, 1972, reveal complex and large-amplitude variations on a one-hour time scale and numerous discontinuities. During this time period an approximate radial alignment of the two spacecraft as seen from the Sun occurred with heliocentric distances of 0.8 AU for Pioneer 9 and 2.2 AU for Pioneer 10, both at 45° east of the Earth’s solar longitude. The peak hourly average solar wind proton bulk velocity measured at Pioneer 9 was 990 km s−1 during hour 0 UT of August 5. The peak hourly average proton number density was 62 cm−3 during hour 11 UT of August 3. The peak solar wind speeds are generally much reduced at Pioneer 10 compared with those observed at Pioneer 9. The peak 30-min average magnetic field magnitude was 85 γ during 1245–1315 UT of August 3. The Pioneer 9 data indicate passage of four fast forward interplanetary shocks, and one slow forward interplanetary shock.
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References
Chao, J. K. and Goldstein, B.: 1972, J. Geophys. Res. 77, 5455.
Colburn, D. S. and Sonett, C. P.: 1966, Space Sci. Rev. 5, 439.
Dryer, M., Smith, Z. K., Endrud, G. H., and Wolfe, J. H.: 1972, Cosmic Electrodyn. 3, 184.
Intriligator, D. S., Wolfe, J. H., McKibbin, D. D., and Collard, H. R.: 1969, Planetary Space Sci. 17, 321.
Lepping, R. P. and Argentiero, P. D.: 1971, J. Geophys. Res. 76, 4349.
McKinnon, J. A.: 1972, NOAA Tech. Memo. ERL SEL-22, U.S. Department of Commerce, N.O.A.A. Environmental Research Laboratories, Boulder, Colo.
Mihalov, J. D. and Wolfe, J. H.: 1971, Cosmic Electrodyn. 2, 326.
NASA: 1971, The Pioneer Mission to Jupiter, SP-268, National Aeronautics and Space Administration, Washington, D.C.
Pomerantz, M. A. and Duggal, S. P.: 1973, Nature 241, 331.
Solar-Geophysical Data (comprehensive reports): 1973, No. 342-part II, U.S. Department of Commerce, Boulder, Colo., p. 4.
Sonett, C. P.: 1966, in R. L. Smith-Rose (ed.), Space Res. 6, Spartan Books, Washington, D. C., p. 280
Tidman, D. A. and Krall, N. A.: 1971, Shock Waves in Collisionless Plasmas, Wiley-Interscience, New York.
Wolfe, J. H.: 1972, in C. P. Sonett, P. J. Coleman, Jr., and J. M. Wilcox (eds.), Solar Wind, SP-308, National Aeronautics and Space Administration, Washington, D.C., p. 170.
Wolfe, J. H. and McKibbin, D. D.: 1968, Planetary Space Sci. 16, 953.
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© 1974 D. Reidel Publishing Company, Dordrecht-Holland
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Mihalov, J.D., Colburn, D.S., Collard, H.R., Smith, B.F., Sonett, C.P., Wolfe, J.H. (1974). Pioneer Solar Plasma and Magnetic Field Measurements in Interplanetary Space during August 2–17, 1972. In: Page, D.E. (eds) Correlated Interplanetary and Magnetospheric Observations. Astrophysics and Space Science Library, vol 42. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-2172-2_35
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DOI: https://doi.org/10.1007/978-94-010-2172-2_35
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