
\documentclass[twocolumn,11pt]{article}
\setlength{\textheight}{9truein}
\setlength{\topmargin}{-0.8truein}
\setlength{\parindent}{0pt}
\setlength{\parskip}{10pt}
\setlength{\columnsep}{.5in}
\newcommand{\beq}{\begin{equation}}
\newcommand{\eeq}{\end{equation}}
\usepackage{graphicx} 

\begin{document}

This is a diagram which explains the
altitude-azimuth, or ``alt-az'', coordinate
system.  It is a purely local system:
the coordinates determined by an observer
in New York will not agree with those determined
simultaneously by an observer in Texas.

\begin{figure}
  \includegraphics[scale=0.5]{altaz.eps}
  \caption{The alt-az coordinate system}
\end{figure}

Notice that, in the final typeset document,
the diagram doesn't always end 
up in the same place relative to the surrounding
text as it does in the input file.

\end{document}
