{\bf H}_{\bf 1} \left[ {\begin{array}{*{20}c}
 3 & {913} \\
 {913} & {278249} \\
\end{array}} \right]\left[ {\begin{array}{*{20}c}
 b \\
 a \\
\end{array}} \right] = {\bf H}_{\bf 1} \left[ {\begin{array}{*{20}c}
 {311} \\
 {94780} \\
\end{array}} \right] \Rightarrow {\bf R}\left[ {\begin{array}{*{20}c}
 b \\
 a \\
\end{array}} \right] = {\bf Q}^{\bf T} \left[ {\begin{array}{*{20}c}
 {311} \\
 {94780} \\
\end{array}} \right]