Calculation of CME kinematics and propagation directions by connecting STEREO HI-images with in situ data
Abstract
On a sample of selected events we determined the propagation directions and the kinematics of several coronal mass ejections by using data provided by the Heliospheric Imagers (HI) and the PLASTIC and IMPACT instruments onboard the two STEREO satellites and the Wind spacecraft near Earth. We tracked for each CME the leading edge and core within time-elongation plots (Jplots) and converted the measured elongation angle into distance by using different methods (Point-P, Fixed-Phi and their harmonic mean). Furthermore, we used the Sheeley-method to fit our measurements and calculate the propagation angles and arrival times at the other spacecraft assuming that the CMEs propagate with constant velocity. Finally we discuss our results by comparing the kinematics derived from the different techniques.
- Publication:
-
38th COSPAR Scientific Assembly
- Pub Date:
- 2010
- Bibcode:
- 2010cosp...38.1894R