Thesis work: WUotD: beacon disciplining

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Eric-Teunis de Boone 2023-03-28 18:11:10 +02:00
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commit 5c733f4c37
3 changed files with 313 additions and 72 deletions

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@ -26,14 +26,14 @@ Standalone devices,
\subsubsection{Time Synchronisation}
\label{sec:timesynchro}
The main method of synchronising multiple stations is by employing a \gls{GNSS}.
This system should deliver timing with an accuracy in the order of $50\ns$ (see Section~\ref{sec:grand:gnss}).
This system should deliver timing with an accuracy in the order of $10\ns$ \cite{} (see Section~\ref{sec:grand:gnss}).
\\
Need reference system with better accuracy to constrain (Figure~\ref{fig:reference-clock}).
Need reference system with better accuracy to constrain current mechanism (Figure~\ref{fig:reference-clock}).
\begin{figure}
\centering
\includegraphics[width=\textwidth]{clocks/reference-clock.pdf}
\includegraphics[width=0.5\textwidth]{clocks/reference-clock.pdf}
\caption{
Using a reference clock to compare two other clocks.
}
@ -46,9 +46,47 @@ Need reference system with better accuracy to constrain (Figure~\ref{fig:referen
\end{figure}
\subsection{Interferometry}
\section{Interferometry}
\label{sec:interferometry}
Requires $\sigma_t \lesssim 1\ns$
Rough outline of Interferometry?
\\
Requires $\sigma_t \lesssim 1\ns$ \cite{Schoorlemmer:2020low}
\begin{figure}
\includegraphics[width=0.5\textwidth]{radio_interferometry/Schematic_RIT_extracted.png}
\caption{From H. Schoorlemmer}
\end{figure}
\begin{equation}
\label{eq:propagation_delay}
\Delta_i = \frac{ \left|{ \vec{x} - \vec{a_i} }\right| }{c} n_{eff}
\end{equation}
\begin{equation}
\label{eq:interferometric_sum}
S(\vec{x}, t) = \sum_i S_i(t + \Delta_i(\vec{x}))
\end{equation}
\begin{figure}
\begin{subfigure}[t]{0.3\textwidth}
\includegraphics[width=\textwidth]{radio_interferometry/trace_overlap_bad.png}
\label{fig:trace_overlap:bad}
\end{subfigure}
\hfill
\begin{subfigure}[t]{0.3\textwidth}
\includegraphics[width=\textwidth]{radio_interferometry/trace_overlap_medium.png}
\label{fig:trace_overlap:medium}
\end{subfigure}
\hfill
\begin{subfigure}[t]{0.3\textwidth}
\includegraphics[width=\textwidth]{radio_interferometry/trace_overlap_best.png}
\label{fig:trace_overlap:best}
\end{subfigure}
\caption{Trace overlap due to wrong positions}
\label{fig:trace_overlap}
\end{figure}
\end{document}