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Compressed sensing for wide-field radio interferometric imaging

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Academic year: 2021

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Figure 1. Ratio of number of samples on the plane to the sphere (N p / N s ) to sufficiently sample a band-limited signal defined on the sphere when projected on to the plane ( θ FOV is specified in degrees)
Figure 2. Projection of a sampled signal from the sphere to the plane. In order to project on to a regular grid on the plane (to reduce significantly the computational load of subsequent analyses through the use of FFTs), a re-gridding operation is requir
Figure 3. Real and imaginary parts of the w -term modulation C( l 2 ) (for w d = 1 / √
Figure 4. Imposed sparsity of simulations of Gaussian sources as a function of the S/N of the original compressible signal compared to the imposed sparse signal (as explained in the text)
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