航天线阵立体相机参数在轨渐进标定方法  

The On-orbit Progressive Calibration Method for Aerospace Linear-array Stereo Camera Parameters

作　　者：王建荣 卢学良[1,2] 杨秀策 吕源[1,2] WANG Jianrong;LU Xueliang;YANG Xiuce;LYU Yuan(Statel Key Laboratory of Geo-information Engineering,Xi'an 710054,China;Xi'an Institute of Surveying and Mapping,Xi'an 710054,China)

机构地区：[1]地理信息工程国家重点实验室,西安710054 [2]西安测绘研究所,西安710054

出　　处：《航天返回与遥感》2023年第1期112-116,共5页Spacecraft Recovery & Remote Sensing

摘　　要：空中三角测量是实现相机参数在轨标定有效途径,将变化了的立体相机进行整体重组,提高无控定位精度。在整体参数解算时,由于影像的宽高比(影像宽度与轨道高的比值)太小,导致主距的改正数得不到正确值,影响相机参数在轨标定结果。文章在基于线阵–面阵混合配置的CCD影像光束法平差基础上,提出相机参数渐进标定的方法,并利用“天绘一号”03星数据进行试验验证。试验结果表明,该方法能有效削弱宽高比太小对标定结果的影响,减小系统误差,提高卫星影像无控定位精度。The aerial triangulation is an effective way to achieve on-orbit calibration of camera parameters. The changed stereo camera is reorganized as a whole to improve the location accuracy without using Ground Control Points(GCPs). When calculating the parameters as a whole, the correction number of the principal distance may not get the correct value due to small ratio of W/H(image width/track height), which affects the on-orbit calibration results of the camera parameters. Based on the bundle adjustment of the Line-Matrix CCD image, a method for progressive calibration of camera parameters is proposed in this paper,and experimental verification is performed using the data of 3rd of TH-1. The results show that the method can effectively weaken the influence of too small W/H on the calibration results, reduce system errors, and improve the location accuracy without using GCPs.

关 键 词：卫星摄影测量 空中三角测量 无控定位 在轨标定 航天遥感 

分 类 号：P237[天文地球—摄影测量与遥感]