前视扫描声呐成像径向误差分析和补偿.docx

$$\alpha = \left\{ \begin{split} &{\rm{arctan}} \left( {\left( {256 - m} \right)/\left( {n - 256} \right)} \right)/\pi \times

180 + 180,\;\;\;n < 256\\ &{\rm{arctan}} \left( {\left( {256 - m} \right)/\left( {n - 256} \right)} \right)/\pi \times 180,

\;\;\;\;\qquad\;\, n > 256\\ & 90,\qquad\qquad\qquad\qquad\qquad\;\;\qquad\qquad\qquad\qquad\quad n = 256 \end{split}

\right.$$