\chapter{Introduction}
\input{../intro/macros_act}
\input{../intro/intro_act}

\section{Tomography}
\input{../intro/tomo_act}

\subsection{Non-linear problems}
\input{../intro/nonlinear_act}

\subsection{Tomography and null space}
\input{../intro/nullspace_act}

\section{Overview of thesis}
\input{../intro/forceful_act}

\subsection{Tau tomography}
\input{../intro/tau_act}
%
%In reflection tomography the true location of the reflectors is unknown and
%must be simultaneously inverted for with velocity.
%A time error can be explained by either changing the reflector position or
%the medium velocity, Figure~\ref{fig:ambiguity}.  
%
%
\subsection{Steering filters}
\input{../intro/steer_act}

%\subsection{Non-stationary filter regularization}
%
%
%
%
%
%
%
\subsection{Field tests}
\input{../intro/field_act}

\subsection{Appendices}
\input{../intro/nonstat_act}
\input{../intro/append_act}
%
%
%In the last two sections I di
\section{Assumptions and limitations}
\input{../intro/limit_act}

