diff --git a/presentations/2023-03-08_hep_student_seminar/2023-HEP-student-seminar.tex b/presentations/2023-03-08_hep_student_seminar/2023-HEP-student-seminar.tex
index de6443a..7624987 100644
--- a/presentations/2023-03-08_hep_student_seminar/2023-HEP-student-seminar.tex
+++ b/presentations/2023-03-08_hep_student_seminar/2023-HEP-student-seminar.tex
@@ -33,7 +33,70 @@
 \begin{document}
 \frame{\titlepage}
 
-\begin{frame}{Enhancing time accuracy}
-
+%%%%%
+%%%%%
+\section{Cosmic Rays}
+\begin{frame}{Particles from space}
 \end{frame}
+\begin{notes}
+	- Ultra energy, solid idea for source missing
+\end{notes}
+
+\begin{frame}{Airshowers}
+\end{frame}
+\begin{notes}
+	- Coming into atmosphere, trying to measure particle debris
+	  through Cherenkov light.
+	- FD/SD
+\end{notes}
+
+\begin{frame}{Airshowers: Radio Detection}
+\end{frame}
+\begin{notes}
+	measurables of RD: EM
+\end{notes}
+
+\begin{frame}{Airshowers: Interferometric Radio Detection}
+\end{frame}
+\begin{notes}
+	Can reconstruct spatial distribution
+	Requires sigma < 1 ns
+\end{notes}
+
+
+%%%%%
+%%%%%
+\section{Experimental problem}
+\begin{frame}{Experiments: Autonomous antennas}
+\end{frame}
+\begin{notes}
+	Introduce GRAND and Auger
+\end{notes}
+
+\begin{frame}{Experiments: GNSS timing}
+\end{frame}
+\begin{notes}
+	Note timing accuracy obtained in Auger
+\end{notes}
+
+
+%%%%%
+%%%%%
+\section{Improving time synchronisation}
+\begin{frame}{Improving time synchronisation}
+\end{frame}
+\be
+
+%%%%%
+\subsection{Can GNSS be improved}
+% Hardware setups WR / GRAND
+\begin{frame}{Improving GNSS timing}
+\end{frame}
+
+%%%%%
+\subsection{Other methods to improve timing}
+% mixing clock information with physics
+\begin{frame}{Beacon}
+\end{frame}
+
 \end{document}