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Analogue Processing Methods for Synthesis Observations

Published online by Cambridge University Press:  12 April 2016

T.W. Cole
T.W. Cole*
Affiliation:
Division of Radiophysics, CSIRO, Sydney, Australia

Extract

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In aperture synthesis the formation of an image involves the two steps of spatial correlation across an aperture and transformation to the image. This is closely related to conventional imaging with a lens (Cole, 1977a), which Abbé interpreted as two successive transformations at the surfaces of the lens. With the simple lens the image is the light intensity in the output plane (Figure 1(a)). In aperture synthesis (Figure 1(b)) the image is the transform of the correlation but no detection takes place. The image corresponds to the ‘light’ amplitude rather than intensity.

Type
Part III: Processing Techniques and Display Methods
Information
International Astronomical Union Colloquium , Volume 49: Image Formation from Coherence Functions in Astronomy , 1979 , pp. 123 - 141
Copyright
Copyright © Reidel 1979

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