A method for measuring the exact position of the energy centre of an image spot of a light beam ends object on a photosensor.

摘要

The detector is a matrix of charge and the measurement is performed by barycentric calculation. The steps of the method are the following: & br / center the field of measurement (30) on the estimated position of the object of the light (p 1 (1)); select a first group of ns brightest pixels (31), selecting, among these ns the na pixels agglomerates to the pixel of the maximum level (37); finally carry out a barycentric calculation only on the agglomerated na pixels (ie) of the measurement field. & br / application to the star tracking particularly for the operation of a satellite operating.