Combination of w-projection and faceting

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5.3.18.4 Combination of w-projection and faceting

You can also use a combination of w-projection and faceting:

gridmode            = ’widefield’       #  The kind gridding kernel to be used for FFT-based transforms
     wprojplanes    =         32        #  Number of w-projection planes for convolution
     facets         =          3        #  Number of facets along each axis (main image only)

This hybrid method allows for a smaller number of wprojplanes in order to try to conserve memory if the image size approached the memory limit of the computer. However, there is a large penalty in execution time.

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