## 4 Conclusions
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Station**} & \multicolumn{3}{c}{**DD**} & \multicolumn{3}{c}{**PPP**} \\ \cline{2-7}  & **dN** & **dE** & **dU** & **dN** & **dE** & **dU** \\ \hline NYA200 NOR & \(-3.4\pm 1.0\) & \(5.9\pm 1.1\) & \(1.4\pm 3.9\) & \(-6.3\pm 2.9\) & \(9.0\pm 2.7\) & \(11.4\pm 35.5\) \\ OBE400 DEU & \(-0.8\pm 1.1\) & \(2.2\pm 0.9\) & \(14.7\pm 3.4\) & \(3.0\pm 1.2\) & \(8.7\pm 2.8\) & \(16.9\pm 5.6\) \\ BRUX00 BEL & \(-0.6\pm 0.8\) & \(1.0\pm 0.7\) & \(10.7\pm 2.5\) & \(1.5\pm 0.8\) & \(-0.7\pm 2.6\) & \(12.8\pm 2.2\) \\ BADH00 DEU & \(0.0\pm 1.2\) & \(0.1\pm 1.0\) & \(7.3\pm 3.5\) & \(1.5\pm 1.4\) & \(-0.9\pm 3.1\) & \(14.0\pm 5.7\) \\ GELL00 DEU & \(0.1\pm 1.0\) & \(-0.4\pm 0.8\) & \(17.9\pm 3.1\) & \(2.7\pm 0.4\) & \(3.4\pm 5.7\) & \(25.4\pm 2.1\) \\ GOR200 DEU & \(-0.8\pm 1.1\) & \(-0.4\pm 0.9\) & \(4.6\pm 3.4\) & \(3.7\pm 1.1\) & \(-6.3\pm 2.3\) & \(11.8\pm 5.2\) \\ WRLG00 DEU & \(0.3\pm 0.7\) & \(1.0\pm 0.6\) & \(-3.9\pm 2.4\) & \(3.8\pm 1.1\) & \(5.0\pm 3.5\) & \(9.3\pm 4.2\) \\ DOUR00 BEL & \(1.6\pm 1.0\) & \(-0.9\pm 0.8\) & \(8.2\pm 3.1\) & \(4.0\pm 0.8\) & \(-5.8\pm 1.4\) & \(11.1\pm 4.7\) \\ AUBG00 DEU & \(0.1\pm 1.3\) & \(0.3\pm 1.1\) & \(-7.1\pm 4.1\) & \(-2.9\pm 4.2\) & \(5.7\pm 6.1\) & \(-5.5\pm 5.7\) \\ BAUT00 DEU & \(-0.8\pm 1.1\) & \(-0.1\pm 0.9\) & \(0.9\pm 3.4\) & \(3.4\pm 0.7\) & \(1.6\pm 3.3\) & \(8.2\pm 2.4\) \\ BORJ00 DEU & \(-0.7\pm 1.1\) & \(0.6\pm 0.9\) & \(4.4\pm 3.2\) & \(1.9\pm 1.2\) & \(1.5\pm 1.7\) & \(6.3\pm 3.4\) \\ DIEP00 DEU & \(0.0\pm 0.9\) & \(0.5\pm 0.8\) & \(1.3\pm 3.4\) & \(3.3\pm 0.4\) & \(1.6\pm 1.3\) & \(7.7\pm 2.8\) \\ DILL00 DEU & \(0.4\pm 1.2\) & \(0.2\pm 1.0\) & \(4.4\pm 3.9\) & \(5.3\pm 1.1\) & \(6.0\pm 2.1\) & \(7.3\pm 5.3\) \\ EUSK00 DEU & \(-0.6\pm 1.1\) & \(0.4\pm 0.9\) & \(13.0\pm 3.1\) & \(4.8\pm 0.7\) & \(6.3\pm 1.9\) & \(9.5\pm 3.5\) \\ HEL200 DEU & \(-1.4\pm 1.1\) & \(0.3\pm 0.9\) & \(3.7\pm 3.2\) & \(1.6\pm 0.7\) & \(2.2\pm 2.0\) & \(6.5\pm 5.0\) \\ HELG00 DEU & \(-0.1\pm 1.0\) & \(0.0\pm 0.8\) & \(5.4\pm 2.9\) & \(3.2\pm 1.1\) & \(-1.8\pm 1.9\) & \(11.2\pm 5.0\) \\ HOF00 DEU & \(-2.6\pm 1.3\) & \(0.2\pm 1.1\) & \(2.8\pm 4.0\) & \(1.8\pm 0.8\) & \(-6.2\pm 2.1\) & \(11.5\pm 5.1\) \\ HOFN00 ISL & \(0.0\pm 1.0\) & \(-1.5\pm 0.9\) & \(15.1\pm 3.2\) & \(-1.3\pm 0.8\) & \(2.9\pm 1.4\) & \(11.3\pm 2.1\) \\ ISTA00 TUR & \(-0.9\pm 1.1\) & \(0.9\pm 1.0\) & \(13.0\pm 3.9\) & \(0.0\pm 0.6\) & \(2.0\pm 2.7\) & \(18.6\pm 1.9\) \\ NIC000 CYP & \(-1.9\pm 1.0\) & \(-0.6\pm 1.0\) & \(7.3\pm 3.4\) & \(-2.2\pm 0.9\) & \(-0.2\pm 4.6\) & \(16.9\pm 2.9\) \\ PTBB00 DEU & \(-1.0\pm 1.1\) & \(-0.1\pm 0.9\) & \(13.6\pm 3.3\) & \(3.1\pm 0.6\) & \(2.7\pm 2.2\) & \(16.5\pm 4.3\) \\ RANT00 DEU & \(-0.6\pm 1.0\) & \(0.9\pm 0.8\) & \(1.4\pm 2.8\) & \(3.7\pm 1.0\) & \(2.3\pm 4.1\) & \(6.5\pm 2.5\) \\ REYK001 SL & \(-1.3\pm 1.3\) & \(-1.0\pm 1.2\) & \(13.6\pm 4.0\) & \(-2.2\pm 1.5\) & \(5.8\pm 2.6\) & \(9.9\pm 4.0\) \\ SAS200 DEU & \(-1.5\pm 1.1\) & \(-0.3\pm 0.9\) & \(4.9\pm 3.3\) & \(4.1\pm 0.8\) & \(6.5\pm 4.5\) & \(9.0\pm 4.1\) \\ WARN00 DEU & \(-0.7\pm 0.9\) & \(-0.4\pm 0.8\) & \(4.3\pm 2.9\) & \(3.9\pm 0.6\) & \(0.7\pm 3.2\) & \(5.1\pm 3.1\) \\ \hline Mean & \(-0.7\pm 1.0\) & \(0.4\pm 1.4\) & \(6.5\pm 6.1\) & \(1.8\pm 2.8\) & \(2.1\pm 4.1\) & \(10.8\pm 5.6\) \\ \hline \  
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Station**} & \multicolumn{3}{c}{**DD**} & \multicolumn{3}{c}{**PPP**} \\ \cline{2-7}  & **dN** & **dE** & **dU** & **dN** & **dE** & **dU** \\ \hline NYA200 NOR & \(6.7\pm 1.0\) & \(8.3\pm 1.1\) & \(-1.7\pm 3.9\) & \(3.7\pm 2.9\) & \(9.5\pm 2.6\) & \(7.3\pm 38.6\) \\ OBE400 DEU & \(8.3\pm 1.1\) & \(5.0\pm 0.9\) & \(0.6\pm 3.5\) & \(12.2\pm 1.2\) & \(11.2\pm 2.8\) & \(3.1\pm 5.6\) \\ BRU00 BEL & \(-1.7\pm 0.8\) & \(1.1\pm 0.7\) & \(-2.7\pm 2.6\) & \(0.0\pm 0.8\) & \(-1.1\pm 2.7\) & \(-2.0\pm 2.1\) \\ BADHO0 DEU & \(-0.1\pm 1.2\) & \(0.7\pm 0.9\) & \(7.1\pm 3.4\) & \(1.6\pm 1.2\) & \(0.9\pm 3.1\) & \(8.9\pm 3.0\) \\ GEL100 DEU & \(-0.3\pm 0.9\) & \(0.2\pm 0.8\) & \(3.5\pm 3.1\) & \(0.7\pm 0.4\) & \(3.5\pm 4.8\) & \(11.2\pm 2.1\) \\ GOR200 DEU & \(-1.6\pm 1.1\) & \(0.6\pm 0.9\) & \(-1.1\pm 3.4\) & \(2.0\pm 1.0\) & \(-6.3\pm 1.8\) & \(4.6\pm 4.6\) \\ WRLG00 DEU & \(0.3\pm 0.7\) & \(1.1\pm 0.6\) & \(-0.5\pm 2.4\) & \(3.2\pm 1.1\) & \(4.5\pm 3.3\) & \(-4.5\pm 4.1\) \\ DOUR00 BEL & \(1.7\pm 1.0\) & \(-0.2\pm 0.8\) & \(1.3\pm 3.1\) & \(3.6\pm 0.8\) & \(-4.9\pm 1.4\) & \(3.4\pm 4.1\) \\ AUBG00 DEU & \(-0.1\pm 1.3\) & \(1.2\pm 1.1\) & \(-9.6\pm 4.1\) & \(-4.3\pm 4.2\) & \(5.6\pm 6.4\) & \(-10.9\pm 5.1\) \\ BAUT00 DEU & \(-1.0\pm 1.1\) & \(0.5\pm 0.9\) & \(-0.9\pm 3.3\) & \(1.8\pm 0.6\) & \(1.1\pm