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Wave Distribution Functions of Magnetospheric VLF Waves with Multiple Field Components: The Effect of the Polarization Model in the Integration Kernels on the Reconstruction of Wave Distribution Functions
Shin SHIMAKURA Masashi HAYAKAWA
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1992/08/25
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on the 6th Digital Signal Processing Symposium)
direction finding, wave distribution function, magnetospheric VLF waves,
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The wave distribution functions (WDFs) have been reconstructed by means of the maximum entropy inversion to the observed spectral matrix composed of the auto- and cross-power spectra among the three field components (Bx, By and Ez) in which the exactly right-handed circular polarization is taken in the integration kernels. The purpose of this paper is to investigate the properties of wave distribution functions reconstructed for wave sources whose central polarization is somewhat deviated from right-handed circular and to study (1) the WDF's by using the right-handed circular polarization in the kernels, (2) the effect of larger deviations for the polarization of elementary plane waves consituting the wave source, (3) the WDF's based on the elliptical polarization kernels and (4) the effect of limiting the number of eigenvalues. It is then found that changing the polarization model in the integration kernels would be helpful in finding out the polarization of the actually observed signals.