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Proceedings Paper

Automatic recognition of auroral forms
Author(s): Mikhail I. Pudovkin; Ake Steen; N. V. Nikolaev; O. I. Kornilov; Urban Brandstrom; Bjorn Gustavsson; Peter Rydesater
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Paper Abstract

A method for recognition of geometrical shapes in auroral forms is presented. The method is based on the analysis of isolines of auroral luminosity shapes. The basic variables used are the angle, (phi) (s), between the tangent of the contour and the x-axis of an arbitrary coordinate system, and the differential, d(phi) (s), as a function of the distance, s, along the contour. The analysis also includes Fourier transformation of the experimental function d(phi) (s) obtained for the observed auroral forms, and the comparison of the power spectrum, F(k), with those for a series of model contours. Some dynamical characteristics of the aurora are also discussed.

Paper Details

Date Published: 22 March 1999
PDF: 7 pages
Proc. SPIE 3728, Ninth Workshop on Virtual Intelligence/Dynamic Neural Networks, (22 March 1999); doi: 10.1117/12.343030
Show Author Affiliations
Mikhail I. Pudovkin, Univ. of St. Petersburg (Russia)
Ake Steen, Swedish Institute of Space Physics (Sweden)
N. V. Nikolaev, Univ. of St. Petersburg (Russia)
O. I. Kornilov, Univ. of St. Petersburg (Russia)
Urban Brandstrom, Swedish Institute of Space Physics (Sweden)
Bjorn Gustavsson, Swedish Institute of Space Physics (Sweden)
Peter Rydesater, Mid Sweden Univ. (Sweden)

Published in SPIE Proceedings Vol. 3728:
Ninth Workshop on Virtual Intelligence/Dynamic Neural Networks
Thomas Lindblad; Mary Lou Padgett; Jason M. Kinser, Editor(s)

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