Journal
SOLAR PHYSICS
Volume 256, Issue 1-2, Pages 183-199Publisher
SPRINGER
DOI: 10.1007/s11207-009-9336-7
Keywords
Coronal mass ejections, initiation and propagation; Flares
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Funding
- Austrian Academy of Sciences [11262]
- Austrian Fonds zur Forderung der wissenschaftlichen Forschung [P20867-N16]
- European Community's Seventh Framework Programme [FP7/2007-2013, 218816]
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Based on a set of 11 CME events we study the impact of projection effects by tracking CME leading edge features in the plane of sky (traditional CME tracking) from combined STEREO-SECCHI and SOHO-LASCO observations up to 20R (aS (TM)). By using CME observations from two vantage points and applying triangulation techniques, the source region location of the CME on the solar surface was determined (heliospheric longitude and latitude) to correct for projection effects. With this information, the directivity and true speed of a CME can be estimated in a simple way. The comparison of the results obtained from the spacecraft pairs SOHO-LASCO/STEREO-A and SOHO-LASCO/STEREO-B allows us to study the reliability of the method. The determined CME source region is generally coincident within a parts per thousand(2)10A degrees.
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