基于机载GPS-IMU系统实现直接定向的研究  

Image Quality Inspection System for Frame Digital Aerial Photography Instrument

作　　者：蒋勤玉 丁兆连 JIANG Qinyu;DING Zhaolian(Guangzhou Southern Satellite Navigation Instrument Co. Ltd., Guangzhou 510663, China;The Second Institute of Photoprammetry and Remote Sensing, Ministry of Natural Resources, Harbin 150081, China)

机构地区：[1]广州南方卫星导航仪器有限公司,广东广州510663 [2]自然资源部第二航测遥感院,黑龙江哈尔滨150081

出　　处：《测绘与空间地理信息》2019年第6期139-142,共4页Geomatics & Spatial Information Technology

摘　　要：主要研究利用高精度的机载GPS-IMU集成系统,还原航摄仪在摄影时像片的外方位元素,实现直接定向。在航空摄影测量作业时,通过GPS差分定位和高精度IMU的内业数据处理、检校计算,获取到了位置及姿态信息,此方法简化了作业流程,节省了外业工作量,缩短了时间周期。文本对此过程的误差来源进行分析,提出优化方法,特别是通过检校计算补偿系统误差,对提高直接定向技术精度及应用效果有重大意义,尤其是在自然灾害应急保障方面的应用更加广泛[1]。This paper mainly studies the airborne GPS and IMU system based on the high precision, and uses the GPS differential positioning and high-precision IMU data processing in the aerial photography operation to obtain the position and attitude information, and to restore the exterior orientation elements of the aerial camera in the photography. This method simplifies the operation process, saves the workload in the field and shortens the time period. This paper analyzes the error sources of this process, which is of great significance to improve the accuracy and application effect of direct geolocation technology, especially in the application of natural disaster emergency support.

关 键 词：GPS差分定位 直接定向 应急保障 

分 类 号：P228.4[天文地球—大地测量学与测量工程]