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Use of a priori models in `CLEAN'

A priori models of sources can be used to good effect in `CLEAN'. A good example is in the `CLEAN'ing of images of planets. In this case the visibility function of a circular disk can be subtracted from the observed visibilities before making the dirty image. `CLEAN' is then asked only to find the small perturbations from the disk model, so the image quality and speed of convergence can both be improved.

1996 November 4
10:52:31 EST