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EISCAT measurements of the level of interplanetary scintillation
R.A.Fallows, P.J.S.Williams, A.R.Breen and P.J.Moran
The scintillation index of a particular radio source is a straightforward
calculation made using observations of interplanetary scintillation.
Previous measurements of the scintillation index have been of limited value
without simultaneous measurements of Solar Wind velocities and scattering
per unit volume along the line of sight. Using the spaced antennae of
EISCAT to measure interplanetary scintillation and deriving the boundaries
of fast and slow streams in the Solar Wind from optical measurements of the
corona, the relationship between scintillation index and distance from the
Sun for both the strong- and weak- scattering regimes can be investigated.
Comparisons with scintillation due to Coronal Mass Ejections and Co-Rotating
Interaction Regions are also investigated.
(Paper presented by Prof. P.J.S. Williams, Cardiff)
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