Title :
An improvement of stars´ centroid determination using PSF-fitting method
Author :
Suszynski, Robert ; Wawryn, Krzysztof
Author_Institution :
Fac. of Electron. & Comput. Sci., Koszalin Univ. of Technol., Koszalin, Poland
Abstract :
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.
Keywords :
astronomical telescopes; astronomy computing; calibration; optical transfer function; readout electronics; turbulence; GoTo calibration; Matlab environment; PSF-fitting method; centroid determination; centroid estimation algorithm; distortion error minimisation signal; electromechanical telescope system; ground telescope system; point spread function; readout noise; reference star; telescope images; turbulence effect; Accuracy; Charge coupled devices; Detectors; Image reconstruction; Noise; Standards; Telescopes; PSF fitting; centroid estimation; image processing;
Conference_Titel :
Signals and Electronic Systems (ICSES), 2014 International Conference on
Conference_Location :
Poznan
DOI :
10.1109/ICSES.2014.6948715
