diff --git a/documents/thesis/chapters/beacon_discipline.tex b/documents/thesis/chapters/beacon_discipline.tex
index 75cda2e..c85a50e 100644
--- a/documents/thesis/chapters/beacon_discipline.tex
+++ b/documents/thesis/chapters/beacon_discipline.tex
@@ -32,7 +32,7 @@ This influences the tradeoff between methods.
 In the following, the synchronisation scheme for both the continuous and intermittent beacon are elaborated upon.
 \Todo{further outline}
 
-\section{Physical Setup} %<<<
+\section{Timing Problem} %<<<
 
 \begin{figure}
 	\centering
@@ -154,7 +154,7 @@ In the following, two approaches for measuring $(\tMeasArriv)_i$ are examined.
 %%%% >>>
 %%%% Pulse
 %%%%
-\section{Intermittent Pulse Beacon}% <<<
+\section{Pulse Beacon}% <<<
 \label{sec:beacon:pulse}
 If the stability of the clock allows for it, the synchronisation can be performed during a discrete period.
 The tradeoff between the gained accuracy and the timescale between synchronisation periods allows for a dead time of the detectors during synchronisation.
@@ -277,7 +277,7 @@ Since the filtered signal is sampled discretely, this means the start of the
 %%%% >>>
 %%%% Sine
 %%%%
-\section{Continuous Sine Beacon}% <<<
+\section{Sine Beacon}% <<<
 \label{sec:beacon:sine}
 % continuous -> can be discrete
 In the case that the stations need continuous synchronisation, a different route must be taken.
diff --git a/documents/thesis/chapters/introduction.tex b/documents/thesis/chapters/introduction.tex
index f4d8d80..f28a923 100644
--- a/documents/thesis/chapters/introduction.tex
+++ b/documents/thesis/chapters/introduction.tex
@@ -11,39 +11,26 @@
 \label{sec:introduction}
 
 
-\section{Cosmic Rays}
+\section{Cosmic Particles}
 \label{sec:crs}
+Particles from outer space,
+Particle type,
+Energy,
+magnetic fields -- origin,
 
-\subsection{Airshowers}
+\subsection{Air Showers}
 \label{sec:airshowers}
+Particle cascades,
+Xmax?,
+Radio emission,
 
-\subsection{Detectors}
+\subsection{Experiments}
 \label{sec:detectors}
 Standalone devices,
 \gls*{PA},
-\gls*{GRAND}
-
-\section{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 $10\ns$ \cite{} (see Section~\ref{sec:grand:gnss}).
-\\
-
-Need reference system with better accuracy to constrain current mechanism (Figure~\ref{fig:reference-clock}).
-
-\begin{figure}
-	\centering
-	\includegraphics[width=0.5\textwidth]{clocks/reference-clock.pdf}
-	\caption{
-		Using a reference clock to compare two other clocks.
-	}
-	\label{fig:reference-clock}
-	\todo{
-		redo figure with less margins,
-		remove spines,
-		rotate labels
-	}
-\end{figure}
+AugerPrime RD,
+\gls*{GRAND},
+\gls*{LOFAR}?,
 
 
 \section{Interferometry}
@@ -93,4 +80,27 @@ Requires $\sigma_t \lesssim 1\ns$ \cite{Schoorlemmer:2020low}
 	\caption{Trace overlap due to wrong positions}
 	\label{fig:trace_overlap}
 \end{figure}
+
+\section{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 $10\ns$ \cite{} (see Section~\ref{sec:grand:gnss}).
+\\
+
+Need reference system with better accuracy to constrain current mechanism (Figure~\ref{fig:reference-clock}).
+
+\begin{figure}
+	\centering
+	\includegraphics[width=0.5\textwidth]{clocks/reference-clock.pdf}
+	\caption{
+		Using a reference clock to compare two other clocks.
+	}
+	\label{fig:reference-clock}
+	\todo{
+		redo figure with less margins,
+		remove spines,
+		rotate labels
+	}
+\end{figure}
+
 \end{document}
diff --git a/documents/thesis/chapters/radio_measurement.tex b/documents/thesis/chapters/radio_measurement.tex
new file mode 100644
index 0000000..2fe8141
--- /dev/null
+++ b/documents/thesis/chapters/radio_measurement.tex
@@ -0,0 +1,26 @@
+\documentclass[../thesis.tex]{subfiles}
+
+\graphicspath{
+	{.}
+	{../../figures/}
+	{../../../figures/}
+}
+
+\begin{document}
+\chapter{Measuring with Radio Antennas}
+\label{sec:waveform}
+Electric fields,
+Antenna Polarizations,
+Frequency Bandwidth,
+\\
+
+Time Domain,
+Sampling,
+Waveform + Time vector,
+\\
+
+Analysis:
+Fourier Transforms,
+Correlation
+
+\end{document}
diff --git a/documents/thesis/chapters/single_sine_interferometry.tex b/documents/thesis/chapters/single_sine_interferometry.tex
new file mode 100644
index 0000000..35f8b6a
--- /dev/null
+++ b/documents/thesis/chapters/single_sine_interferometry.tex
@@ -0,0 +1,13 @@
+\documentclass[../thesis.tex]{subfiles}
+
+\graphicspath{
+	{.}
+	{../../figures/}
+	{../../../figures/}
+}
+
+\begin{document}
+\chapter{Single Sine Beacon and Interferometry}
+\label{sec:single}
+
+\end{document}
diff --git a/documents/thesis/thesis.tex b/documents/thesis/thesis.tex
index a40646e..a68fd5a 100644
--- a/documents/thesis/thesis.tex
+++ b/documents/thesis/thesis.tex
@@ -31,9 +31,15 @@
 %%	Introduction
 \subfile{chapters/introduction.tex}
 
+%%  Electric field from airshower to waveform analysis
+\subfile{chapters/radio_measurement.tex}
+
 %%	Disciplining by Beacon (Simulation)
 \subfile{chapters/beacon_discipline.tex}
 
+%% Single Sine Synchronisation and Radio Interferometry
+\subfile{chapters/single_sine_interferometry.tex}
+
 %%	Comparing GNSS system (GRAND experiments)
 \subfile{chapters/grand_characterisation.tex}