$\begin{figure} \par\resizebox{8.8cm}{!}{\includegraphics{4124fig1.eps}}\hspace*{1mm} \resizebox{8.8cm}{!}{\includegraphics{4124fig2.eps}}\end{figure}$ Figure 1: Comparison of the real dopplergram ( left, observed by MDI/SoHO) and the simulated one ( right). Both images are visually very similar. The black colour means line-of-sight velocity -700 m s^-1 (towards an observer) while white represents +700 m s^-1.
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In the text

$\begin{figure} \par\resizebox{8.8cm}{!}{\includegraphics{4124fig3.ps}}\hspace*{1mm} \resizebox{8.8cm}{!}{\includegraphics{4124fig4.ps}}\end{figure}$ Figure 2: Left - model vector velocity field. Right - a velocity field that was computed by applying the LCT method to the synthetic supergranulation pattern with the imposed model field. The arrow lengths, representing the velocity magnitudes, have the same scale. The images are visually very similar, however the magnitudes of calculated velocities are underestimated.
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In the text

$\begin{figure} \par\resizebox{8.8cm}{!}{\includegraphics{4124fig5.ps}}\par\end{figure}$ Figure 3: Scatter plot for inference of the calibration curve. Magnitudes of calculated velocities are slightly underestimated by LCT, but the linear behaviour is clearly visible. A line representing the 1:1 ratio is displayed. The calibration affects only the magnitudes of the flows, while the directions do not need any correction.
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In the text

$\begin{figure} \par\resizebox{8.8cm}{!}{\includegraphics{4124fig6.ps}}\end{figure}$ Figure 4: Dependence of the 1- $\sigma$ -error of the calculated velocity on the time lag when no model velocity field was introduced and only the evolution of supergranules have been taken into account. The dashed line represents lag 16 (4 h) that is usually used in our method.
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In the text

$\begin{figure} \par\resizebox{8.8cm}{!}{\includegraphics{4124fig7.ps}}\hspace*{1mm} \resizebox{8.8cm}{!}{\includegraphics{4124fig8.ps}}\end{figure}$ Figure 5: Influence of the calculated velocity field on the choice of FWHM of the correlation window. Left - 120 $^{\prime \prime }$ , right - 200 $^{\prime \prime }$ . The model velocity field is the same as in Fig. 2.
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In the text

$\begin{figure} \par\resizebox{8.8cm}{!}{\includegraphics{4124fig1.eps}}\hspace*{1mm} \resizebox{8.8cm}{!}{\includegraphics{4124fig2.eps}}\end{figure}$	Figure 1: Comparison of the real dopplergram ( left, observed by MDI/SoHO) and the simulated one ( right). Both images are visually very similar. The black colour means line-of-sight velocity -700 m s^-1 (towards an observer) while white represents +700 m s^-1.
Open with DEXTER

$\begin{figure} \par\resizebox{8.8cm}{!}{\includegraphics{4124fig3.ps}}\hspace*{1mm} \resizebox{8.8cm}{!}{\includegraphics{4124fig4.ps}}\end{figure}$	Figure 2: Left - model vector velocity field. Right - a velocity field that was computed by applying the LCT method to the synthetic supergranulation pattern with the imposed model field. The arrow lengths, representing the velocity magnitudes, have the same scale. The images are visually very similar, however the magnitudes of calculated velocities are underestimated.
Open with DEXTER

$\begin{figure} \par\resizebox{8.8cm}{!}{\includegraphics{4124fig5.ps}}\par\end{figure}$	Figure 3: Scatter plot for inference of the calibration curve. Magnitudes of calculated velocities are slightly underestimated by LCT, but the linear behaviour is clearly visible. A line representing the 1:1 ratio is displayed. The calibration affects only the magnitudes of the flows, while the directions do not need any correction.
Open with DEXTER

$\begin{figure} \par\resizebox{8.8cm}{!}{\includegraphics{4124fig6.ps}}\end{figure}$	Figure 4: Dependence of the 1- $\sigma$ -error of the calculated velocity on the time lag when no model velocity field was introduced and only the evolution of supergranules have been taken into account. The dashed line represents lag 16 (4 h) that is usually used in our method.
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$\begin{figure} \par\resizebox{8.8cm}{!}{\includegraphics{4124fig7.ps}}\hspace*{1mm} \resizebox{8.8cm}{!}{\includegraphics{4124fig8.ps}}\end{figure}$	Figure 5: Influence of the calculated velocity field on the choice of FWHM of the correlation window. Left - 120 $^{\prime \prime }$ , right - 200 $^{\prime \prime }$ . The model velocity field is the same as in Fig. 2.
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$\begin{figure} \resizebox{8.8cm}{!}{\includegraphics{4124fig9.ps}}\end{figure}$	Figure 6: Histograms of velocity magnitudes for various FWHM of the LCT algorithm.
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