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This section presents selected design parameters that influence selected objectives in \S~\ref{sec:obj}.  \subsection{Antenna Aspects}  We will select design parameters that apply to many antenna types, including offset Gregorian and symmetric Cassegrain.   \subsubsection{Collecting \subsubsection{Antenna Collecting  Area} We will use $A$ in this document as each array element collecting area (thus we could also write $\pi \cdot D^2$, with $D$ being the dish diameter).  \subsubsection{Efficiency}  We will use $\eta_a$ in this document as the antenna efficiency with