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\section{Overview}\label{sec:intro}  This document presents a parametric model to help design an Interferometric Array. One aspect of Array Design is the array performance vs. total cost trade-off that emerges from goals and parameters selection. This document describes design parameters in \S~\ref{sec:var} and their mathematical relationship with typical array performance objectives and cost estimating functions in \S~\ref{sec:obj}. A python code spreadsheet  is introduced in \S~\ref{sec:python}. This code spreadsheet  generates data to visualize  a pareto front of feasible arrays, given a selection of objectives and associated goals. This code is consistent with facilitates an analysis based in  the Multi-Objective Visual Analytics (MOVA) framework for complex engineered systems proposed in \cite{mova}. \section{Parameters}\label{sec:var}  This section aims to include all relevant design parameters that might influence the selected performance objectives in \S~\ref{sec:obj}.  \subsection{Antenna Aspects} 
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