| 紧耦合直接地理定位技术精度分析与应用 |
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| 引用本文： | 陈洁,李京,杜磊,韩亚超.紧耦合直接地理定位技术精度分析与应用[J].测绘通报,2017(1). |
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| 作者姓名： | 陈洁 李京 杜磊 韩亚超 |
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| 作者单位： | 1. 中国国土资源航空物探遥感中心,北京100083;中国科学院遥感与数字地球研究所,北京100101;2. 中国国土资源航空物探遥感中心,北京,100083 |
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| 基金项目： | 中国地质调查局航遥中心项目 |
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| 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。
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| 关 键 词： | 机载POS 紧耦合 惯导辅助动态模糊度解算 虚拟参考站 |
Application and Precision Analysis of Tight Coupling Direct Georeferencing Method |
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| CHEN Jie,LI Jing,DU Lei,HAN Yachao.Application and Precision Analysis of Tight Coupling Direct Georeferencing Method[J].Bulletin of Surveying and Mapping,2017(1). |
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| Authors: | CHEN Jie LI Jing DU Lei HAN Yachao |
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| Abstract: | The direct georeferencing method,based on airborne POS-supported system,provides mean square errors with the plane and elevation less than 10 and 15 cm respectively.However,to achieve such precision,the airborne data acquiring process has to meet a series of relatively strict standards.The tight coupling direct georeferencing method that based on virtual reference station and inertiallyaided real time kinematic overcomes the restrictions on the flight conditions and the base station distance.Even in the case of satellite unlock,ground base station distance over 70 km and no base station,it can still obtain the results met the accuracy.This paper adopts the tight coupling direct georeferencing method to carry out the high-precision digital aerial remote sensing application in urban Shenyang city,Liaoning Province,China.Results show that the accuracy of the data obtained by the airborne POS based on tight coupling scheme is better than that of the loose combination.And the results obtained by the tight coupling precise point positioning solution can also meet the relevant standards. |
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| Keywords: | airborne POS tight coupling INS-aided kinematic ambiguity resolution virtual reference station |
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