| 实时精密单点定位中周跳探测与修复的算法研究 |
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| 引用本文： | 易重海,朱建军,陈永奇,戴吾蛟.实时精密单点定位中周跳探测与修复的算法研究[J].武汉大学学报(信息科学版),2011,36(11):1314-1319. |
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| 作者姓名： | 易重海 朱建军 陈永奇 戴吾蛟 |
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| 作者单位： | 1. 中南大学测绘与国土信息工程系,长沙市麓山南路,410083
2. 香港理工大学土地测量与地理资讯学系,香港九龙红砌 |
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| 基金项目： | 国家自然科学基金资助项目(40704002); 香港研究资助委员会基金资助项目(PolyU5132/05E) |
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| 摘 要： | 提出了一种适用于实时GPS精密单点定位的周跳探测与修复的新算法。该算法步骤为：①利用M-W组合和电离层残差组合初步确定没有发生周跳和可能发生周跳的卫星;②利用当前历元与前一（或几个）历元的L1、L2和Lw观测值和第一步得出的没有发生周跳的卫星信息,采用基于历元间差分观测值的周跳处理模型对可能发生周跳的卫星进行周跳探测;③对第二步中周跳处理失败的卫星进行进一步的精化处理,以尽可能修复周跳。实验表明,新算法在实时GPS精密单点定位中可以准确地探测并修复周跳。
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| 关 键 词： | 实时 精密单点定位 周跳探测与修复 |
Cycle-Slip Detection and Correction Algorithm for Real-Time PPP |
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| YI Zhonghai ZHU Jianjun CHEN Yongqi DAI Wujiao.Cycle-Slip Detection and Correction Algorithm for Real-Time PPP[J].Geomatics and Information Science of Wuhan University,2011,36(11):1314-1319. |
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| Authors: | YI Zhonghai ZHU Jianjun CHEN Yongqi DAI Wujiao |
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| Institution: | YI Zhonghai1 ZHU Jianjun1 CHEN Yongqi2 DAI Wujiao1(1 Department of Survey Engineering and Geomatics,Central South University,South Lushan Road,Changsha 410083,China)(2 Department of Land Surveying and Geoinformatics,Hong Kong Polytechnic University,Hung Hom,Kowloon,Hong Kong,China) |
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| Abstract: | A cycle-slip detection and correction algorithm suitable for real-time precise point positioning(PPP) was proposed.There are three main steps in the algorithm: ① Possible cycle-slip affected satellites and cycle-slip free satellites were determined using M-W and ionosphere residual observation combination;② Cycle slip detection and correction was conducted for possible cycle-slip affected satellites using cycle-slip free satellites information and observations of current epoch and previous one or several epoch(s),based on the new developed epoch-differenced cycle slip detection model;③ Refinement process for cycle slip detection failed satellites to try to repair cycle slip.The experimental results show that the new algorithm can detect and repair cycle slip correctly and efficiently in real time PPP. |
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| Keywords: | real time precise point positioning cycle slip detection and correction |
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