Abstract
We present the results of a comprehensive study of the fast solar wind near solar minimum conditions using interplanetary scintillation (IPS) data taken with the EISCAT system in northern Scandinavia, and a recent extremely long baseline observation using both EISCAT and MERLIN systems. The results from IPS observations suggest that the fast wind inside 100 solar radii (R ) can be represented by a two-mode model in some cases but this distinction is much less clear by in situ distances beyond 1 astronomical unit (215 R ). Two distinct fast streams are seen in the extremely long baseline IPS observation; comparison of the IPS line of sight with a synoptic map of white light indicates the faster mode overlies the polar crown and the slower fast mode overlies an equatorial extension of the polar coronal hole.
Original language | English |
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Journal | Journal of Geophysical Research: Space Physics |
Volume | 112 |
Issue number | A6 |
DOIs | |
Publication status | Published - 01 Jun 2007 |
Keywords
- EISCAT
- interplanetary scintillation (IPS)
- solar wind