Instantaneous local wave vector estimation from multi-spacecraft measurements using few spatial points

Carozzi, T., Buckley, A. and Gough, M. (2004) Instantaneous local wave vector estimation from multi-spacecraft measurements using few spatial points. Annales Geophysicae, 22 (7). pp. 2633-2641. ISSN 0992-7689

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Abstract

We introduce a technique to determine instantaneous local properties of waves based on discrete-time sampled, real-valued measurements from 4 or more spatial points. The technique is a generalisation to the spatial domain of the notion of instantaneous frequency used in signal processing. The quantities derived by our technique are closely related to those used in geometrical optics, namely the local wave vector and instantaneous phase velocity. Thus, this experimental technique complements ray-tracing. We provide example applications of the technique to electric field and potential data from the EFW instrument on Cluster. Cluster is the first space mission for which direct determination of the full 3-dimensional local wave vector is possible, as described here.

Item Type: Article
Additional Information: Published by European Geosciences Union
Schools and Departments: School of Engineering and Informatics > Informatics
School of Engineering and Informatics > Engineering and Design
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Depositing User: Paul Gough
Date Deposited: 14 Nov 2006
Last Modified: 30 Nov 2012 16:50
URI: http://sro.sussex.ac.uk/id/eprint/451
Google Scholar:2 Citations
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