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The present sequence of two articles reports on a custom-built toolkitimplementing a technique similar to multi-directional medical tomography tosimulate and visualize the composite 3D structure of winds from hot closedouble stars. In such hot binaries, the light sources scanning and probing thecomposite wind volume are the bright "surfaces" (photospheres) of theindividual stars. Then, as the Keplerian orbit is traced out and the geometrypresented to the observer varies, each star constitutes an analyzer upon itscompanion's wind. In contrast to medical tomography, however, these targets aretoo far to be resolved spatially so we resort to modeling the ultraviolet (UV)spectral lines of certain wind ions (e.g., N+4, Si+3, C+3) whose shapes varywith Keplerian phase as the stars revolve around their common centre of mass.The flagships of the toolkit are the Spectrum Analyzer and Animator (SA 2 ) andthe Binary 3D Renderer (B3dR). The SA 2 is the subject of the present article(paper I). It automates (a) the derivation of light curves from the observedspectra and (b) the generation of synthetic binary wind-line profiles whichreproduce the morphologies and variabilities of the observed wind profiles. Thesecond tool, the B3dR is discussed in paper II.

Realistic Multimedia Tools based on Physical Models: I. The Spectrum Analyzer and Animator (SA2)