Wide Field Imaging and mosaicing in particular are particularly susceptible to pointing errors and smearing effects

High Dynamic Range Imaging exacerbates all of these problems, especially the multiplicative errors and (non-closing) baseline errors, and is the most demanding imaging experiment in radio astronomy!

Weak source detection experiments (in blank fields) are fairly forgiving as only strong errors will show up

Low resolution tapered images are a good first step in order to survey the possible problem areas in the image, such as finding confusing sources in the far sidelobes and diagnosing RFI and other problems

Polarization images of non-polarized sources can be a good check on noise levels; differences between the two IFs are also good problem indicators

It is possible to Fourier Transform offending error signals in the image back to the visibility plane to isolate the source