Chinese Optics, Volume. 16, Issue 4, 878(2023)
Real-time measurement for boresight vibration of dual line array surveying and mapping cameras
Fig. 1. Schematic diagram of the on-satellite measurement of the camera’s internal and external parameters
Fig. 2. Schematic diagram of the on-satellite measurement of internal and external parameters of a single camera
Fig. 3. Processing flow based on the principle of Dual Vector Attitude Determination（DVAD）
Fig. 4. Errors of internal and external parameters with different centroid extraction accuracy
Fig. 5. Error of each measurement parameter with the centroid extraction accuracy of 0.1 pixel
Fig. 6. The errors of each measurement parameter at different focal lengths
Fig. 7. The errors of each measurement parameter at different device spacing
Fig. 8. Internal and external parameter residuals calculated by DVAD and simplified algorithm
Fig. 9. Schematic diagram of vacuum test system for internal and external parameter calibration and the picture of cameras
Fig. 10. Internal and external parameter calibration results in a thermal vacuum in 2 circles
Table 1. Basic input parameters
View tableView in ArticleTable 1. Basic input parameters
符号 定义 $ {OX_{{\text{OTA}}}}{Y_{{\text{OTA}}}}{Z_{{\text{OTA}}}} $ 镜头物方坐标系, $ O $ 为坐标原点,${O' X' _{ {\text{OTA} } } }{ Y' _{ {\text{OTA} } } }{ Z_{ {\text{OTA} } } }$ 镜头像方坐标系， $ O' $ 为坐标原点，$ O'{X'_{{\text{OTA}}}} $ 从原点指向CCD线阵中心，$ {O'Z_{{\text{OTA}}}} $ 为视轴方向，第三轴符合右手定则$ {OX_{{\text{HRC}}}}{Y_{{\text{HRC}}}}{Z_{{\text{HRC}}}} $ 相机坐标系, $ {Z_{{\text{HRC}}}} $ 从CCD中心指向$O $ 点,$ {Y_{{\text{HRC}}}} $ 与$ {Y_{{\text{OTA}}}} $ 方向一致$M_1 M_2 $ 焦平面上分置于CCD两端的面阵探测器 $ {\theta _{m1}},{\theta _{m2}} $ M1,M2探测器转角 $ \begin{array}{l}{A}_{0}({x}_{c1},{y}_{c1})，\\ {B}_{0}({x}_{c2},{y}_{c2})\end{array} $ M1,M2探测器中心点 $ \begin{array}{l}{A}_{1}({x}_{01},{y}_{01})，\\ {B}_{1}({x}_{02},{y}_{02})\end{array} $ M1,M2探测器坐标系下的初始坐标 $ \begin{array}{l}{A}_{2}({x}_{11},{y}_{11})，\\ {B}_{2}({x}_{22},{y}_{22})\end{array} $ M1,M2探测器坐标系下的实测坐标 $ {F_{{\text{OTA}}}} $ 相机焦距 $ \omega $ 离轴角
Table 2. Basic input parameters
View tableView in ArticleTable 2. Basic input parameters
参数 数值 像素大小 $ d $ /μm10 离轴角 $ \omega $ /(°)6 尺度因子/ $ Kf $ 0.5 M1探测器转角 $ {\theta _{m1}} $ /(°)0 M2探测器转角 $ {\theta _{m2}} $ /(°)0 M1初始点坐标 A1/pixel (0,0) M2初始点坐标B1/pixel (0,0) 焦距, $ F_0 $ /mm6000 $ {L_{c1}} $ /mm500 $ {L_{c2}} $ /mm−500 M1、M2 探测器像素规模 5120×3840
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Guo-fang ZHAI, Qing-sheng YU, Yun-long WANG, Wei-jun GAO. Real-time measurement for boresight vibration of dual line array surveying and mapping cameras[J]. Chinese Optics, 2023, 16(4): 878
Category: Original Article
Received: Aug. 2, 2022
Accepted: Nov. 2, 2022
Published Online: Jul. 27, 2023
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