Pioneer Venus and IMP 8 observations of the latitude dependence of the solar wind

Details Pioneer Venus and IMP 8 observations of the latitude dependence of the solar wind Pioneer Venus and IMP 8 observations of the latitude dependence of the solar wind

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....98.9391g&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. A6, p. 9391-9400.

Physics

17

Heliosphere, Interplanetary Magnetic Fields, Pioneer Venus Spacecraft, Solar Wind Velocity, Solar Corona, Vela Satellites

Scientific paper

Solar wind speeds and magnetic field data from the Pioneer Venus Orbiter (0.7 AU) and IMP 8 (1 AU) have been compared to infer the latitudinal structure of the solar wind in the inner heliosphere between 1984 and 1987. The solar wind in the inner heliosphere was found to exhibit an unusual structure during the last solar minimum (1986-1987). High-speed streams were excluded from the vicinity of the solar equator, and the solar wind at low heliographic latitudes (less than 3 deg) was characterized by low-speed solar wind with irregular fluctuations in velocity. At higher latitudes the solar wind had a conventional stream structure with two high-speed streams per solar rotation. While the velocities of these high-speed streams did not appear to vary significantly with latitude, the latitudinal gradients at the equatorward boundaries of high-speed streams were high.

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