Non-coplanar baselines effect in interferometry

Timothy J. Cornwell; Richard A. Perley

doi:10.1117/12.23678

1 November 1990 Non-coplanar baselines effect in interferometry

Proceedings Volume 1351, Digital Image Synthesis and Inverse Optics; (1990) https://doi.org/10.1117/12.23678
Event: 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1990, San Diego, CA, United States

Abstract

Non-coplanar sampling of the visibility function measured by interferometric arrays leads to difficulties in imaging wide-fields. Unlike the case for co-planar sampling or small fields of view, the relationship between sky brightness and the visibility is not a simple two-dimensional Fourier transform, and so the usual methods of image reconstruction cannot be applied. We describe and analyze some of the many schemes which have been advocated to overcome this problem. The most promising is based upon an observation by Clark that if the sky brightness is thought of as lying on a surface embedded in a three dimensional space, a Fourier relationship does hold.

Citation Download Citation

Timothy J. Cornwell and Richard A. Perley "Non-coplanar baselines effect in interferometry", Proc. SPIE 1351, Digital Image Synthesis and Inverse Optics, (1 November 1990); https://doi.org/10.1117/12.23678

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