摘要
“全球连续覆盖模式”传输型摄影测量卫星系动态摄影,无控定位模式下难以达到框幅式像片定位水平.本文在天绘一号已有研究基础上,深化03星摄影测量无控定位精度改进模式的探讨研究.在相机参数在轨标定中增加对相机内方位元素的附加改正,解决相机结构宽高比(卫星条带摄影覆盖宽度与卫星轨道高度的比值)太小对主距标定结果的影响,进而削弱系统误差,提高卫星影像的平面定位精度.通过境外地区检测,无控定位精度达到高程2.4m (RMS),平面3.7m (RMS).检测结果表明,只依靠星上GNSS接收机、星敏感器,利用相机参数在境内标定结果,“全球连续覆盖模式”单航线卫星影像无控定位结果达到理论设计指标.
The transmission photogrammetric satellite with global coverage on a continuous basis belongs to dynamic photography, and the location without ground control points (GCPs) can-not reach to the level of the frame imagery. In this paper, the location without GCPs is researched in-depth about 3th satellite, based on the existing research results of TH-1. In order to counteract the negative effect of small width-to-height ratio (ratio of satellite strip photographic coverage width to satellite orbital height), the additional corrections of interior orientation elements were performed during the on-orbit calibration. As a result, the systematic errors were reduced while the horizontal location accuracy was improved, and the location accuracy without GCPs have achieved to 3.7 m (horizontal accuracy) and 2.4 m (vertical elevation accuracy) using foreign testing field. The location without GCPs of a single strip satellite imagery with global coverage on a continuous basis can be improved to the theoretical level by using its GNSS receiver, star tracker and domestic calibration results of camera parameters.
作者
王任享
王建荣
李晶
朱雷鸣
李五
杨俊峰
WANG Renxiang;WANG Jianrong;LI Jing;ZHU Leiming;LI Wu;YANG Junfeng(National Key Laboratory of Geo-Information Engineering,Xi’an 710054,China;Xi’an Institute of Surveying and Mapping,Xi’an 710054,China;Center of TH-Satellite of China,Beijing 102102,China)
出处
《测绘学报》
EI
CSCD
北大核心
2019年第6期671-675,共5页
Acta Geodaetica et Cartographica Sinica
关键词
卫星摄影测量
空中三角测量
无控定位
外方位元素
在轨标定
photogrammetric satellite
aerial triangulation
location without GCPs
exterior orientation elements
on-orbit calibration
