Thanks guys for talking this one out. daveray666, just by the nature of the technology, VLA will be a much tighter tolerance. Just think of it this way - if you were looking at a 2D picture yourself, it'd be much easier to tell how much higher one ball was from the other (travelling perpendicular to your line of sight) vs how much farther one was away from the other (along your line of sight, as in closer/farther from camera).
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