A general theoretical method for star pointing with the coelostat of the Meudon solar tower

Physics – Optics

Scientific paper

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Astronomical Coordinates, Pointing Control Systems, Solar Reflectors, Spectrographs, Star Trackers, Telescopes, Directivity, Mirrors

Scientific paper

A general method for pointing in any direction with the coelostat of the Meudon solar tower is presented. It is based on the solution of the complete set of equations which relates the astronomical co-ordinates of the direction (or of the star) with the mechanical and geometrical parameters defining the position and movements of the mirrors necessary for tracking the set direction during its diurnal movement. The set of equations allows the verification of the empirical abacus obtained earlier by Miguel (1975). This method may be easily extended to any other case than multiple reflexion in a mirror system (i.e. solar energy array of mirrors); in addition it avoids the complicated system of matrix transformations of the classical methods.

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