sec5 work in progress

paper/sections/06-results.tex

@@ -43,9 +43,29 @@ Some previous works cited in section~\ref{sec:related} discuss the TTFF but none
 
 Up to the limited extent to which they are comparable -- due to the fact that are used Assisted-GPS sensors and the extra software layers included in the experiments -- the results are coherent with what discussed here. Our model on the other side achieves more generality not being dependent on the specific implementation on the given device. Moreover it allows to look directly at what are the theoretical performances we should expect from a GPS sensor without the overhead that is introduced by the operative system of a smartphone.
 
+Next we want to show how our model captures the expiration of the ephemeris data and the loss of visibility or the satellites. Figure~\ref{fig:control2} and~\ref{fig:position2} shows a duty cycling of the sensor for quickly acquiring position -- wartm start. At time $t = 1860 sec$ the ephemeris data expire making the duty cycling ineffective. Only after a prolonged period being turne
 
+-------------------------------------------
+ and a prolonged turn\_ON signal is required in order to update the ephemeris data and make available again the position. In figure~\ref{fig:control2} we can see the described turn\_ON signal while in~\ref{fig:position2} we can see the availability of the position measure. In this example the ephemeris data expire around time=1880 , we can see how the sampling suddently becomes uneffective and the position becomes available again only after around a minute in which it is continuously turned on and reads the ephemeris data.
 
+\begin{figure}[h]
+ \begin{center}
+  \includegraphics[width=0.70\columnwidth]{images/control2.png}
+  \caption{Control signal for the antenna in the simulation of the expiration of ephemeris data.
+           \label{fig:control2}
+          }
+ \end{center}
+\end{figure}
 
+\begin{figure}[h]
+ \begin{center}
+  \includegraphics[width=0.70\columnwidth]{images/position2.png}
+  \caption{Availability of the position measure in the simulation of the expiration of ephemeris data.
+           \label{fig:position2}
+          }
+ \end{center}
+\end{figure}
+-------------------------------------------
 \subsection{Power Consumption Accuracy Trade Off}
 \label{sec:res:tradeoff}