Physics
Scientific paper
Jan 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995angeo..13...76g&link_type=abstract
Annales Geophysicae (ISSN 0992-7689), vol. 13, no. 1, p. 76-83
Physics
14
Cometary Magnetospheres, Magnetohydrodynamic Waves, Wave Dispersion, Wave Propagation, Computerized Simulation, Eigenvalues, Eigenvectors, Giotto Mission, Halley'S Comet, Mathematical Models, Polarization (Waves), Wave Equations
Scientific paper
A recognition formalism is presented for searching for and identifying the modes in a magnetohydrodynamic wave field. The method provides the contributions of the wave energy in the different modes for one propagation direction. Forward and backward running waves are also distinguished. The method developed is also applicable when the frequency and wave number of a wave field are not known simultaneously or when the dispersion of different modes is disgenerate. The wave field is analyzed with respect to its generalized polarization of the state vector. The applicability of the method is tested using simulated data and real data from the experiments onboard the Giotto spacecraft near comet P/Halley. In both cases unique identification of the different wave modes is achieved.
Glassmeier Karl-Heintz
Motschmann Uwe
von Stein R.
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