thesis: shuffling content

move airshower chapter into introduction,
merge beacon introduction into beacon_disciplining chapter,
move gnss to grand section

documents/thesis/chapters/introduction.tex

@@ -11,4 +11,33 @@
 \label{sec:introduction}
 
 
+\section{Cosmic Rays}
+\label{sec:airshowers}
+
+\subsection{Airshowers}
+\label{sec:airshowers}
+
+\subsection{Detectors}
+\label{sec:detectors}
+Pierre Auger,
+GRAND
+
+\subsection{Interferometry}
+\label{sec:interferometry}
+Requires $\sigma_t \lesssim 1\ns$
+
+
+\section{Time Synchronisation}
+\label{sec:timesynchro}
+Need reference system with better accuracy to constrain
+See Section~\ref{sec:grand:gnss}.
+
+\begin{figure}
+	\centering
+	\includegraphics[width=\textwidth]{clocks/reference-clock.pdf}
+	\caption{
+		Using a reference clock to compare two other clocks.
+	}
+	\label{fig:reference-clock}
+\end{figure}
 \end{document}