着陆段初期，将局部图像提取的特征点与绕飞段建立的特征点数据库进行匹配，结合小天体三维模型，确定探测器在小天体固连坐标系下的位置、姿态等信息；

At the beginning of landing, the position and attitude of spacecraft can be estimated by using feature matching with the 3D shape features database builded during the rotation phase.

youdao

着陆段初期，将局部图像提取的特征点与绕飞段建立的特征点数据库进行匹配，结合小天体三维模型，确定探测器在小天体固连坐标系下的位置、姿态等信息；

At the beginning of landing, the position and attitude of spacecraft can be estimated by using feature matching with the 3D shape features database builded during the rotation phase.

youdao