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\begin{thebibliography}  \bibitem{sensitivity} Crane, P. C., & Napier, P. J. 1989, in  \textit{Synthesis Imaging in Radio Astronomy}. eds. R. A. Perley, F. R. Schawb, & A. H. Bridle (San Francisco: ASP), 139-167.  \bibitem{design1}  
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