In the practical applications, according to the ground swath width determine the FOV, then choice the optical system configuration which can satisfy the needed FOV and small dimension.
在实际工程应用时应根据不同的地面覆盖宽度的需求确定光学系统视场角，然后根据不同的视场角选定能满足这个视场角要求并尺寸最小的光学系统结构形式。
In the practical applications, according to the ground swath width determine the FOV, then choice the optical system configuration which can satisfy the needed FOV and small dimension.
在实际工程应用时应根据不同的地面覆盖宽度的需求确定光学系统视场角，然后根据不同的视场角选定能满足这个视场角要求并尺寸最小的光学系统结构形式。
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