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Effective point-spread function (ePSF) method is an excellent method for the stars' positional measurements in stellar images, whose critical step is constructing an accurate ePSF mode. In the study, we investigated the effect of the grid density on the mode's accuracy by some experiments on processing synthetic stellar images in which all stars have a Gaussian PSF. Our experimental results show that...
Effective point-spread function (ePSF) method is an excellent method for the positional measurements of stars in undersampled stellar images, whose critical step is deriving an accurate ePSF mode. In the presentation, we investigate the effects of the grid density and the sample density on the mode's accuracy through some experiments on positional measurement in synthetic undersampled stellar images...
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