yeah good question. wild stab in the dark, but the image sharpening could be a technique using time-averaged signal positions. E.g a telescope mirror is not opt

yeah good question. wild stab in the dark, but the image sharpening could be a technique using time-averaged signal positions. E.g a telescope mirror is not optically perfect and subject to tiny movements (wind, rain, ground tremors etc), not to mention of course light being refracted by the atmosphere. so what you do is observe a signal over time to get a statistical fix on its actual, real position. This may well involve Fourier-Transforms where you transform from "time space" to "space space" (not very well worded). I have a feeling Fourier transforms are used a lot in signal transmission and analysis.