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Wavelength and direction filtering by magnetic measurements at satellite arrays: Generalized minimum variance analysis

Glassmeier, K. H.; Motschmann, U.; Southwood, D. J. +2 more

The main goal of the Cluster mission, consisting of four identical spacecraft, is the spatial resolution of plasma structures. For the determination of the wave vectors of a wave field from four positions, classical Fourier analysis is inappropriate. We develop a generalized minimum variance technique which gives a high wave vector resolution thou…