magentaHOGBOM is the basic CLEAN algorithm. It is very robust, but somewhat slow although this is partially compensated by good parallel programming. magentaCLARK introduces a faster strategy for the search and removal of clean component. However, it may converge more slowly and can even be instable when dirty sidelobes are high, or the phase noise still significant. magentaMX cleans the largest region of the dirty map because the source removal happens in the uv plane. For the same map size, it is slower than magentaCLARK because of the repeated imaging step, but smaller image sizes can be used. It shares some of the magentaCLARK instabilities because it uses the same search strategy, but the removal strategy counteracts this. magentaMX can be very slow for large number of visibilities.
magentaHOGBOM, magentaCLARK and magentaMX may introduce artifacts as parallel stripes in the clean map when dealing with smooth, extended structures. magentaSDI, magentaMRC and magentaMULTI introduce a different (in principle better) handling of those extended sources. magentaSDI is a rough attempt and requires a good prior of the support to work correctly. magentaMRC and magentaMULTI introduce the notion of cleaning at different spatial scales. magentaMRC has unfortunately no notion of Clean Components. magentaMULTI is the most advanced tool, but is significantly slower than any other method.
Next: A few (obvious) practical
Up: Practical advices
Previous: Practical advices
Contents
Index
Gildas manager
2023-06-01