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This paper describes an applicative software tool, named IONORT (IONOsphericRay Tracing), for calculating a three-dimensional ray tracing of high frequencywaves in the ionospheric medium. This tool runs under Windows operating systemsand its friendly graphical user interface facilitates both the numerical datainput/output and the two/three-dimensional visualization of the ray path. Inorder to calculate the coordinates of the ray and the three components of thewave vector along the path as dependent variables, the core of the programsolves a system of six first order differential equations, the group path beingthe independent variable of integration. IONORT uses a three-dimensionalelectron density specification of the ionosphere, as well as by geomagneticfield and neutral particles-electrons collision frequency models havingvalidity in the area of interest.

IONORT: a Windows software tool to calculate the HF ray tracing in the ionosphere