紧耦合直接地理定位技术精度分析与应用

发布时间：2018-06-24 08:07

本文选题：机载POS + 紧耦合　；参考：《测绘通报》2017年01期

【摘要】：基于机载POS辅助的直接地理定位系统,可得到平面与高程分别优于10和15 cm的中误差成果。但这一过程的实现对飞行环境和地面基站的依赖度较高,在实际工作中,不仅降低了生产效率,还增加了工作成本。基于虚拟参考基站理论和惯导辅助动态模糊度解算技术的紧耦合直接地理定位技术,摆脱了对飞行条件和基站距离的限制,在卫星失锁、地面基站距离超过70 km和无基站的情况下,仍能获取满足精度的解算结果。本文采用该技术对辽宁沈阳城区进行了高分辨率的数字航空遥感工作,通过对其数据的解算结果显示,采用机载POS紧耦合方案得到的数据精度要明显优于松散组合,在无基站的情况下采用的紧耦合单点精密解算所得到的成果也能满足相应的成果规范。
[Abstract]:Based on the airborne POS aided direct geographic positioning system, the results of mid-error of plane and height are obtained, which are better than 10 cm and 15 cm, respectively. However, the realization of this process is highly dependent on the flight environment and ground base stations. In practical work, it not only reduces the production efficiency, but also increases the work cost. Based on the virtual reference base station theory and the inertial navigation aided dynamic ambiguity resolution technology, the tightly coupled direct geographical positioning technology, which gets rid of the limitation to the flight conditions and base station distance, loses the lock in the satellite. If the distance of ground base station is more than 70 km and there is no base station, the results can be obtained to satisfy the accuracy. In this paper, the high resolution digital aerial remote sensing is carried out in Shenyang City, Liaoning Province. The results show that the precision of airborne POS tight coupling scheme is better than that of loose combination. In the case of no base station, the results obtained by the precise solution of tight coupling single point can also meet the corresponding performance specifications.
【作者单位】：中国国土资源航空物探遥感中心;中国科学院遥感与数字地球研究所;
【基金】：中国地质调查局航遥中心项目(121201003000150020;2002031443130)
【分类号】：P228

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