摘要
为了实现吉林一号宽幅01星亚米级宽幅相机影像的高精度几何定位,建立了超多片TDI CCD机械式交错拼接推扫成像系统的严密几何模型,对严密几何模型进行了基于探元指向角模型附带片间几何定位一致性约束的在轨几何定标方法研究及验证。在推扫式光学遥感卫星成像原理基础上建立严密成像几何模型,通过将定标系数分解为内方位元素定标参数与外方位定标参数,并结合大幅宽超多片探测器机械交错拼接相机的成像特点采用附带片间几何定位一致性约束的分步迭代法求解定标系数。最后,利用参考数据进行了在轨几何定标,获得内外定标系数。结果表明:本文的定标方法及定标模型合理有效,能显著提升吉林一号宽幅01星亚米级宽幅相机影像的无控定位精度,内定标精度优于0.3 pixel,实现了超多片TDI CCD机械式拼接无缝拼接影像的生成,多光谱谱段间配准精度优于0.3 pixel,全色影像与多光谱影像具有一致的几何定位精度,无控定位精度优于20 m(CE90),带控定位精度优于2 m,满足1∶10 000的制图需求。
To realize the high-precision geometric positioning of Jilin1-KF01 A WF camera,a rigorous geometric model which is an ultra-multi-chip TDI CCD mechanical staggered push-broom imaging system was established,and the on-orbit geometric calibration based on the look-angle model was proposed and verified. This model had an added constraint of geometric positioning consistency of the nearby TDI CCD. The rigorous geometric model was realized using the principle of push-broom satellite imaging system. Then,by decomposing the calibration coefficients into calibration parameters of the interior orientation parameters and the exterior orientation model and combining the imaging characteristics of the largewidth and ultra-multi-chip TDI CCD mechanical staggered push-broom imaging system,a step-by step iterative method with constraint of geometric positioning consistency of the nearby TDI CCD was adopted to solve the calibration coefficients. Finally,the on-orbit geometric calibration of Jilin1-KF01 A WF camera was performed using the control data to identify the interior and exterior orientation parameters. Experimental results indicate that the proposed calibration model and method are reasonable and effective. The calibration precision of the interior orientation elements is better than 0. 3 pixel,and the ultra-multi-chip TDI CCD mechanical staggered push-broom imaging system generates seamlessly stitched images. Moreover,the band-to-band registration accuracy is better than 0. 3 pixel. Panchromatic image and the multispectral image had the same geometric positioning accuracy. The positioning accuracy without ground control points(GCPs)improves to 20 m(CE90)and the positioning accuracy with GCPs is better than 2 m,which satisfies the 1∶10 000 topographic maps requirements.
作者
武红宇
白杨
王灵丽
张雷
王栋
巴倩倩
贾益
钟兴
WU Hong-yu;BAI Yang;WANG Ling-li;ZHANG Lei;WANG Dong;BA Qian-qian;JIA Yi;ZHONG Xing(Chang Guang Satellite Technology Co.Ltd.,Changchun 130000,China)
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2021年第8期1769-1781,共13页
Optics and Precision Engineering
基金
国家重点研发计划资助项目(No.2016YFB0500904)
吉林省科技发展计划资助项目(No.20180201108GX)
海南省重大科技计划资助项目(No.ZDKJ2019007)。
关键词
光学遥感
吉林一号宽幅01星
亚米级宽幅相机
严密几何模型
在轨几何定标
定位精度
optical remote sensing
Jilin1-KF01A satellite
sub-meter resolution wide view camera
rigorous geometric model
on-orbit geometric calibration
positioning accuracy
