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\documentclass{article}  \usepackage{amsmath}  \usepackage{biblatex}  \usepackage{mathtools}  \begin{document}  \section{Overview}  This document presents a parametric model to help design an Interferometric Array. It describes the relationship of design parameters in section 2 with performance objectives in section 3.   In particular, this document provides a an explanation of the parameters and objectives selection. These explanations enable the reader to both assess completeness of the model, and accuracy of the mathematical relationships as well. 
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\section{Visualization Tool Notes}  \section{Conversation notes}  \subsection{Engineering cost vs. Calibration cost}  Tricky because you can compensate antenna quality with software. So the equations must capture this trade off.\end{document}