# C-SAR/02 Satellite Polarimetric Calibration and Validation Based on Active Radar Calibrators
## 4 Results and Discussion
### Polarization Calibration Accuracy Inspection and Analysis
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multicolumn{2}{c}{**Device**} & \multicolumn{1}{c}{**HH**} & \multicolumn{1}{c}{**HV**} & \multicolumn{1}{c}{**VH**} & \multicolumn{1}{c}{**VV**} \\ \hline \multirow{8}{*}{Region 1} & CR-1 & 0.8781\(\angle\)2.55\({}^{\circ}\) & 0.0003\(\angle\)126.11\({}^{\circ}\) & 0.0005\(\angle\)74.98\({}^{\circ}\) & 1.0000\(\angle\)0.00\({}^{\circ}\) \\ \cline{2-6}  & CR-2 & 0.9436\(\angle\)0.79\({}^{\circ}\) & 0.0003\(\angle\)–16.93\({}^{\circ}\) & 0.0008\(\angle\)7.55\({}^{\circ}\) & 1.0000\(\angle\)0.00\({}^{\circ}\) \\ \cline{2-6}  & CR-3 & 0.9217\(\angle\)4.35\({}^{\circ}\) & 0.0002\(\angle\)37.26\({}^{\circ}\) & 0.0008\(\angle\)13.91\({}^{\circ}\) & 1.0000\(\angle\)0.00\({}^{\circ}\) \\ \cline{2-6}  & CR-4 & 0.9202\(\angle\)3.17\({}^{\circ}\) & 0.0004\(\angle\)–165.73\({}^{\circ}\) & 0.0002\(\angle\)115.49\({}^{\circ}\) & 1.0000\(\angle\)0.00\({}^{\circ}\) \\ \hline \multirow{8}{*}{Region 2} & CR-5 & 0.9757\(\angle\)2.01\({}^{\circ}\) & 0.0003\(\angle\)–50.82\({}^{\circ}\) & 0.0008\(\angle\)8.94\({}^{\circ}\) & 1.0000\(\angle\)0.00\({}^{\circ}\) \\ \cline{2-6}  & CR-6 & 0.9350\(\angle\)0.00\({}^{\circ}\) & 0.0003\(\angle\)178.77\({}^{\circ}\) & 0.0005\(\angle\)43.87\({}^{\circ}\) & 1.0000\(\angle\)0.00\({}^{\circ}\) \\ \cline{2-6}  & CR-7 & 1.0000\(\angle\)0.00\({}^{\circ}\) & 0.0001\(\angle\)174.45\({}^{\circ}\) & 0.0007\(\angle\)15.80\({}^{\circ}\) & 0.9782\(\angle\)–2.11\({}^{\circ}\) \\ \cline{2-6}  & CR-8 & 0.8685\(\angle\)1.97\({}^{\circ}\) & 0.0005\(\angle\)–44.76\({}^{\circ}\) & 0.0007\(\angle\)1.01\({}^{\circ}\) & 1.0000\(\angle\)0.00\({}^{\circ}\) \\ \cline{2-6}  & CR-9 & 0.9234\(\angle\)4.63\({}^{\circ}\) & 0.0003\(\angle\)158.42\({}^{\circ}\) & 0.0005\(\angle\)61.83\({}^{\circ}\) & 1.0000\(\angle\)0.00\({}^{\circ}\) \\ \cline{2-6}  & CR-10 & 0.8884\(\angle\)0.99\({}^{\circ}\) & 0.0004\(\angle\)177.01\({}^{\circ}\) & 0.0005\(\angle\)152.11\({}^{\circ}\) & 1.0000\(\angle\)0.00\({}^{\circ}\) \\ \cline{2-6}  & CR-11 & 0.9047\(\angle\)4.10\({}^{\circ}\) & 0.0009\(\angle\)70.35\({}^{\circ}\) & 0.0008\(\angle\)59.38\({}^{\circ}\) & 1.0000\(\angle\)0.00\({}^{\circ}\) \\ \cline{2-6}  & CR-12 & 1.0000\(\angle\)0.00\({}^{\circ}\) & 0.0008\(\angle\)–123.66\({}^{\circ}\) & 0.0007\(\angle\)–103.41\({}^{\circ}\) & 0.9999\(\angle\)–1.35\({}^{\circ}\) \\ \cline{2-6}  & CR-13 & 0.9333\(\angle\)12.84\({}^{\circ}\) & 0.0024\(\angle\)–140.31\({}^{\circ}\) & 0.0046\(\angle\)–153.16\({}^{\circ}\) & 1.0000\(\angle\)0.00\({}^{\circ}\) \\ \hline \multirow{8}{*}{Region 3} & CR-14 & 0.9267\(\angle\)0.93\({}^{\circ}\) & 0.0003\(\angle\)170.82\({}^{\circ}\) & 0.0004\(\angle\)58.61\({}^{\circ}\) & 1.0000\(\angle\)0.00\({}^{\circ}\) \\ \cline{2-6}  & CR-15 & 1.0000\(\angle\)0.00\({}^{\circ}\) & 0.0006\(\angle\)–28.24\({}^{\circ}\) & 0.0009\(\angle\)4.47\({}^{\circ}\) & 0.9802\(\angle\)–1.74\({}^{\circ}\) \\ \cline{2-6}  & CR-16 & 0.9873\(\angle\)4.87\({}^{\circ}\) & 0.0003\(\angle\)165.31\({}^{\circ}\) & 0.0006\(\angle\)87.62\({}^{\circ}\) & 1.0000\(\angle\)0.00\({}^{\circ}\) \\ \cline{2-6}  & CR-17 & 0.9220\(\angle\)2.63\({}^{\circ}\) & 0.0005\(\angle\)–169.92\({}^{\circ}\) & 0.0010\(\angle\)175.05\({}^{\circ}\) & 1.0000\(\angle\)0.00\({}^{\circ}\) \\ \cline{2-6}  & CR-18 & 0.9286\(\angle\)4.42\({}^{\circ}\) & 0.0013\(\angle\)9.38\({}^{\circ}\) & 0.0009\(\angle\)14.84\({}^{\circ}\) & 1.0000\(\angle\)0.00\({}^{\circ}\) \\ \cline{2-6}  & CR-19 & 0.8884\(\angle\)0.20\({}^{\circ}\) & 0.0008\(\angle\)–19.19\({}^{\circ}\) & 0.0008\(\angle\)7.35\({}^{\circ}\) & 1.0000\(\angle\)0.00\({}^{\circ}\) \\ \cline{2-6}  & CR-20 & 0.9511\(\angle\)7.49\({}^{\circ}\) & 0.0019\(\angle\)–153.61\({}^{\circ}\) & 0.0034\(\angle\)–165.12\({}^{\circ}\) & 1.0000\(\angle\)0.00\({}^{\circ}\) \\ \cline{2-6}  & CR-21 & 0.9191\(\angle\)3.85\({}^{\circ}\) & 0.0017\(\angle\)–31.68\({}^{\circ}\) & 0.0009\(\angle\)–4.70\({}^{\circ}\) & 1.0000\(\angle\)0.00\({}^{\circ}\) \\ \hline \hline \end{tabular}
\end{table} 
Table 6: Calibration results obtained from the distortion matrix corresponding to Group 2.