measurements of the direction of the solar wind using interplanetary scintillation
Abstract. EISCAT observations of the interplanetary scintillation of a single source were made over an extended period of time, during which the orientation of the baselines between the two observing sites changed signi®cantly. Assuming that maximum correlation between the scintillations observed at...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
1998
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| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.371.7094 http://hal.archives-ouvertes.fr/docs/00/31/64/52/PDF/angeo-16-1259-1998.pdf |
| Summary: | Abstract. EISCAT observations of the interplanetary scintillation of a single source were made over an extended period of time, during which the orientation of the baselines between the two observing sites changed signi®cantly. Assuming that maximum correlation between the scintillations observed at the two sites occurs when the projected baseline is parallel to the direction of plasma ¯ow, this technique can be used to make a unique determination of the direction of the solar wind. In the past it has usually been assumed that the plasma ¯ow is radial, but measurements of eleven sources using this technique have indicated conclusively that in at least six cases observed at mid or high heliocentric latitude there is a signi®cant non-radial component directed in four cases towards the heliocentric equator and in two cases towards the pole. Key words. Solar physics á Astrophysics á Astronomy á Magnetic ®elds á Space plasma physics á Charged particle motion and acceleration 1 |
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