Multi-spacecraft observations of heliographic structure of the solar wind speed

W. Miyake, K. Kobayashi, K. I. Oyama, T. Mukai, T. Abe, T. Terasawa, K. Yumoto, T. Saito, K. Hirao, A. J. Lazarus, A. D. Johnstone

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Multi-spacecraft observations in the interplanetary space are used to build up a picture of the distribution of solar wind velocities in heliographic latitude and longitude. Analyses are made for the solar wind data obtained by Sakigake, Suisei, IMP-8 and Giotto between late 1985 and early 1987. Until Janaury 1986, high-speed streams were extended across the equator from the high latitudes of the heliosphere. After March 1986, high-speed streams were rarely seen on the equator. Although there remained a slight wavy pattern in latitude-longitude structure, low-speed streams were basically ranged along the equator. After January 1987, the amplitude of this wavy pattern was further diminished and low-speed regions were completely aligned to the equator.

Original languageEnglish
Pages (from-to)1329-1342
Number of pages14
JournalPlanetary and Space Science
Issue number12
Publication statusPublished - 1988 Dec

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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