高分七号双线阵立体测绘相机系统集成与测试

2019年11月3日发射的高分七号立体测绘卫星搭载了前、后视两台高分辨率遥感相机,分别从前、后两个方向对地面同一景物进行不同角度的观测,从而形成立体测绘影像。在立体测绘相机的实验室研制阶段,需要确保双线阵相机的线阵水平、共焦一致性、内方位元素与畸变的高精度测试。为了满足高分七号双线阵相机上述技术指标的要求,采用了计算机辅助焦平面快速装调方法以及高精度内方位元素与畸变测试方法,所用方法提高了装调与测试效率,保证了测试精度,相机共焦性优于±0.04 mm,线阵水平优于±1′,畸变测试精度优于2.3μm,可为其他大比例尺测绘遥感相机的研制提供参考。

System integration and test of GF-7 bi-linear array stereo mapping sensing camera

GF-7 stereo mapping satellite launched on November 3, 2019 was equipped with two high-resolution remote sensing cameras “Front camera” and “Back camera”. By the two cameras, the same scene on the ground can be observed from different angles for forming a 3D mapping image. During the development of the stereo mapping camera in the lab, the horizontality of the linear array, field confocal, high-accuracy measurement for elements of interior orientation and distortion should be guaranteed. In order to meet the requirements of the above technical indicators of GF-7 bi-linear array cameras, computer-aided rapid fast adjustment for focal plane and high-precision test for elements of interior orientation and distortion was presented. These methods used in the GF-7 bi-linear array camera improve the efficiency of adjustment and test and guarantee the accuracy of the test results. Finally, confocal plane of each camera is better than ±0.04 mm, horizontality of each linear array is better than ±1′, the accuracy of distortion is better than 2.3 μm. It can provide reference for other large scale mapping camera.