## 3 Threshold FOV of the Satellite Based on the Improved Observation Mode
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multicolumn{2}{c}{**Revisit Period: 1 Day**} \\ \hline \hline \multicolumn{2}{c}{**Minimum Scanning**} & \multicolumn{5}{c}{\(m\)} \\ \multicolumn{2}{c}{**Width**} & **1** & **2** & **3** & **4** & **5** \\ \hline \multirow{5}{*}{\(M\)} & 1 & * & * & * & * & * \\  & 2 & 24.000 deg & * & * & * & * \\  & 3 & 24.000 deg & * & * & * & * \\  & 4 & 24.000 deg & * & * & * & * \\  & 5 & 24.000 deg & * & * & * & * \\  & 6 & 24.000 deg & * & * & * & * \\ \hline \multicolumn{2}{c}{**Revisit Period: 2 Days**} \\ \hline \hline \multicolumn{2}{c}{**Minimum Scanning**} & \multicolumn{5}{c}{\(m\)} \\ \multicolumn{2}{c}{**Width**} & **1** & **2** & **3** & **4** & **5** \\ \hline \multirow{5}{*}{\(M\)} & 1 & * & * & * & * & * \\  & 2 & * & * & * & * & * \\  & 3 & 12.414 deg & 12.000 deg & * & * & * \\  & 4 & 12.414 deg & * & * & * & * \\  & 5 & 12.414 deg & 12.000 deg & * & * & * \\  & 6 & 12.414 deg & * & * & * & * \\ \hline \multicolumn{2}{c}{**Revisit Period: 3 Days**} \\ \hline \hline \multicolumn{2}{c}{**Minimum Scanning**} & \multicolumn{5}{c}{\(m\)} \\ \multicolumn{2}{c}{**Width**} & **1** & **2** & **3** & **4** & **5** \\ \hline \multirow{5}{*}{\(M\)} & 1 & * & * & * & * & * \\  & 2 & * & * & * & * & * \\ \cline{1-1}  & 3 & * & 8.182 deg & * & * & * \\ \cline{1-1}  & 4 & 8.372 deg & * & 8.000 deg & * & * \\ \cline{1-1}  & 5 & 8.372 deg & 8.182 deg & 8.000 deg & * & * \\ \cline{1-1}  & 6 & 8.372 deg & * & * & * & * \\ \hline \end{tabular}
\end{table} 
Table 2: Correspondence between the revisit period and the minimum scanning width under different \(M\) and \(m\). According to Equations (5)-(10) and Table 2, we have sorted out the relationship between the revisit period and the sensor's AOFOV, the number of daily laps of the satellite, and the altitude and inclination of the satellite's orbit (see Table 3). The satellite revisit period and the number of laps per day determine the minimum AOFOV of the sensor. The altitude and inclination of the satellite's orbit depend on the number of laps the satellite operates per day. Under the improved observation mode, the \begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multicolumn{6}{c}{**Revisit Period: 4 Days**} \\ \hline \multicolumn{2}{c}{**Minimum Scanning**} & \multicolumn{4}{c}{\(m\)} \\ \cline{3-6} \multicolumn{2}{c}{**Width**} & **1** & **2** & **3** & **4** & **5** \\ \hline \multirow{6}{*}{\(M\)} & 1 & * & * & * & * & * \\  & 2 & * & * & * & * & * \\  & 3 & * & * & * & * \\  & 4 & * & * & * & * \\  & 5 & 6.316 deg & 6.207 deg & 6.102 deg & 6.000 deg & * \\  & 6 & 6.316 deg & * & * & * & * \\ \hline \multicolumn{6}{c}{**Revisit Period: 5 Days**} \\ \hline \multicolumn{6}{c}{**Minimum Scanning**} & \multicolumn{4}{c}{\(m\)} \\ \multicolumn{2}{c}{**Width**} & **1** & **2** & **3** & **4** & **5** \\ \hline \multirow{6}{*}{\(M\)} & 1 & * & * & * & * \\  & 2 & * & * & * & * \\  & 3 & * & * & * & * \\  & 4 & * & * & * & * \\  & 5 & * & * & * & * \\  & 6 & 5.070 deg & * & * & * & 5.800 deg \\ \hline \multicolumn{6}{l}{\({}^{\star}\)means non-existent.} \\ \end{tabular}
\end{table} 
Table 2: _Cont._