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Table 4

Minimum sizes of the dirty beam images to get an image fidelity or a dynamic range greater than a given value.

Minimum fidelity θalias/θfwhma
or dynamic range (fb = 0)b (fb = 0.0625) (fb = 0.1)

102 2.2 2.2 2.2
103 3.5 3.7 6.6
104 8.4 13.4 13.7
105 19.8  > 20.0  > 20.0



The image sizes are expressed in units of the primary beam full width at half maxium.


The computation is done for 3 different ratios of the secondary-to-primary diameters (i.e. fb, the antenna blockage factors). The values are derived from the modeling of the antenna power patterns shown in Fig. 3.

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