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| Paper: |
Imaging |
| Volume: |
180, Synthesis Imaging in Radio Astronomy II |
| Page: |
127 |
| Authors: |
Briggs, Daniel S.; Schwab, Frederic R.; Sramek, Richard A. |
| Abstract: |
This lecture covers formation of the estimated sky brightness via linear methods. The formalism of the dirty image is developed from the fundamental Fourier transform relationship between observed visibility and sky brightness. The practical computational approximation to this formalism is then covered in detail. Several weighting schemes used to control the shape of the dirty beam are presented. The convolutional gridding used to interpolate the irregularly sampled data onto a rectangular grid is examined in detail, including aliasing of sources outside the primary field of view and ramifications of the choice of convolutional gridding function. |
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