\begin{table*}
[t] \tablewidth{41pc} \caption{Fractal Analysis of Mercury's FAG and DEM (Key: FD &#x2013; Fractal Dimension; $R^2$ &#x2013; Coefficient of Determination)}
\begin{tabular}
{l c c c c c c} \hline  \\  [-7pt] & \multicolumn{6}{c}{Free-Air Gravity (FAG)}  \\  & \multicolumn{3}{c}{Northern hemisphere} & \multicolumn{3}{c}{Southern hemisphere}  \\  & All values& Positive& Negative & All values & Positive & Negative  \\  [7pt] \hline  \\  [-4pt] FD min & 2.10 & 2.01 & 2.01 & 2.13 & 2.01 & 2.01  \\  FD max & 2.56 & 2.38 & 2.41 & 2.64 & 2.40 & 2.44  \\  $R^2$ & 0.908 & 0.968 & 0.967 & 0.975 & 0.994 & 0.990  \\  [7pt] \hline  \\  [-4pt] & \multicolumn{6}{c}{Digital Elevation Model (DEM)}  \\  & \multicolumn{3}{c}{Northern hemisphere} & \multicolumn{3}{c}{Southern hemisphere}  \\  & All values& Positive& Negative & All values & Positive & Negative  \\  [7pt] \hline  \\  [-4pt] FD min &2.01 & 2.0 & 2.01 & 2.01 & 2.0 & 2.01  \\  FD max &2.64 & 2.45 & 2.58 & 2.58 & 2.47 & 2.54  \\  $R^2$ & 0.942 & 0.903& 0.940 & 0.857 & 0.863 & 0.910  \\  [4pt] \hline 
\end{tabular}
\end{table*}
