Abstract Continuous accumulation of IPS (interplanetary scintillation) observations of the solar wind since 1972 enables us to follow solar-cycle variations of large-scale solar wind stream structures. The longitude/latitude structure of the solar wind speed is largely determined by the geometry of the heliospheric neutral sheet; the low-speed solar wind tends to be observed along the neutral sheet, whereas large, predominantly unipolar magnetic regions on the source surface (coronal holes) are the sources of high-speed streams. Large-scale configuration of a transient interplanetary disturbance has been shown to be distorted by the solar wind stream structures. In some cases, strong deceleration of the shock speed will take place along the heliospheric neutral sheet.
Solar wind latitude/longitude variations derived from interplanetary scintillations
Advances in Space Research ; 9 , 4 ; 99-110
1989-01-01
12 pages
Article (Journal)
Electronic Resource
English
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