Abstract Ground-based observations of interplanetary scintillation on a grid of 900–2500 radio sources have been used to derive the three-dimensional structure of large-scale transients of plasma density in the solar wind at distances of 0.5–1.5 AU. The ability to map disturbances and to determine their direction of travel, both within and outside the ecliptic plane, provides an important complement to in situ observations from space vehicles. It has been found that coronal holes at mid-latitudes undergo periods of quiescence followed by sudden eruptions of high speed wind which drive strong shocks at 1 AU. During 1978–1979 coronal holes, not solar flares, were the dominant cause of shock-associated transients in the heliosphere.
IPS-Imaging of heliospheric transients
Advances in Space Research ; 9 , 4 ; 59-62
1989-01-01
4 pages
Article (Journal)
Electronic Resource
English
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