FIELD: physics, optics.
SUBSTANCE: invention relates to optic-electronic instrument making and may be used in optic-electronic instruments (OEI) for celestial orientation, comprising a matrix photodetector with charge accumulation. The solution consists in projection of a stellar sky area onto a photosensitive site of a photodetector via an image lens in three or more spectral ranges and calibration marks with varied exposition time, identification of stellar objects images in all spectral ranges and generation of a multispectral image of stellar objects by selection for each stellar object of an image of that spectral range, the average value of amplitude in which is highest, measurement of linear coordinates of star image centres and calibration marks and recount of linear coordinates of star image centres into angular coordinates o stars in a basic instrument system of coordinates with account of results of measurements of linear coordinates of calibration mark image centres.
EFFECT: increased accuracy of measurement of angular coordinates of stars due to increased signal/noise ratio by processing of star images in separate spectral ranges.
5 cl, 1 dwg
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