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Ann. Geophys., 24, 3173-3177, 2006
www.ann-geophys.net/24/3173/2006/
© European Geosciences Union 2006
Multiple triangulation analysis: application to determine the velocity of 2-D structures
X.-Z. Zhou1,2, Q.-G. Zong2,3, J. Wang1, Z. Y. Pu1, X. G. Zhang1, Q. Q. Shi2, and J. B. Cao2
1Institute of Space Physics and Applied Technology, Peking University, Beijing 100871, China
2Key Laboratory for Space Weather, Chinese Academy of Sciences, Beijing 100080, China
3Center for Atmospheric Research, University of Massachusetts, Lowell, MA 01854, USA
Abstract. In order to avoid the ambiguity of the application of
the Triangulation Method (multi-spacecraft timing method) to
two-dimensional structures, another version of this method,
the Multiple Triangulation Analysis (MTA) is used, to calculate the
velocities of these structures based on 4-point measurements. We
describe the principle of MTA and apply this approach to a real
event observed by the Cluster constellation on 2 October 2003.
The resulting velocity of the 2-D structure agrees with the ones
obtained by some other methods fairly well. So we believe that
MTA is a reliable version of the Triangulation Method for 2-D
structures, and thus provides us a new way to describe their
motion.
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