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Paper: Image Quality Assessment Using the Modulation Transfer Function
Volume: 101, Astronomical Data Analysis Software and Systems V
Page: 219
Authors: Williams, W. E.; Toner, C.
Abstract: The GONG project will use a weighted average based upon the Modulation Transfer Function (MTF) in order to merge image data time series from six sites into a single time series for helioseismic analysis. We have found that images which should be discarded for some helioseismic modes can still be quite useful for others. The use of the MTF function in image quality assessment has allowed the reduction of background noise in specific parts of the mode degree-frequency diagram and minimization of the impact of clouds and scattering on the final data products of the GONG project.
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