Far-Field distortions appear in Image Plane

Errors may be closing (antenna based) or non-closing (baseline based)

Antenna-based errors more easily diagnosed in Fourier plane but impact in Image Plane is diluted by other antennas

Single baseline (correlator) errors diluted further in Image Plane

Common-mode errors are exacerbated in Image Plane cf. visibilities

Time-specific (integration) errors can conspire to be bad in Image Plane

If Science Goal is Imaging, then evalutate allowable error budget in Image Plane

Fourier Relationships Visibilities <=> Image Important to Understand!