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CLEAN ideas

The family of CLEAN algorithms is based on the a priori assumption that the sky intensity distribution is a collection of point sources. The algorithms have three main steps

Initialization
  • of the residual map to the dirty map;
  • and of the clean component list to a NULL (i.e. zero) value.
Iterative search
for point sources on the residual map. As those point sources are found,
  • they are subtracted from the residual map;
  • and then they are logged in the clean component list.
Restoration
of the clean map 1) by convolution of the clean component list with the clean beam, i.e. a Gaussian whose size matches the synthesized beam size and 2) by addition of the residual map.



Subsections

Gildas manager 2023-06-01