An improvement of stars' centroid determination using PSF-fitting method

摘要

This paper presents an algorithm for restoring telescope images corrupted by turbulence effects and readout noise of a telescope system in order to determine centroid positions of stars, especially position of a reference star. A computation method relying on an accurate centroid estimation algorithm reconstructing a point spread function (PSF) from registered telescope images has been used. Minimisation of turbulence effects and telescope control system noise in long term images acquired and registered by the ground telescope is proposed. A solution of the distortion error minimisation signal is dedicated to GoTo calibration procedures built in control mechanisms of the electromechanical telescope system. Proposed method has been verified in Matlab environment for real deep sky images registered by the ground telescope system.