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Abstract: The Istituto Nazionale di Geofisica e Vulcanologia has been involved sinceits foundation in the forecast of the conditions in which a radio link thatmakes use of propagation by means of ionospheric wave takes place. In the lasttimes it gained interest also the precise forecast of the trajectory covered bya radio wave propagating into the atmosphere, specifically into the ionosphere,which can be considered, at first approximation, as an inhomogeneous medium,defined by a refraction index slowly varying in time. This work describes thetheoretical bases to study a trajectory; they substantially make use of themethods of the geometrical optics. Such theoretical bases find applications innumerical methods to calculate the trajectories, as quoted in referencesBianchi, 2009.



Autor: S. Bianchi, U. Sciacca, A. Settimi

Fuente: https://arxiv.org/



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