| 一种改进的星载GPS周跳探测与修复方法 |
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| 引用本文： | 陈逸伦,郝金明,于合理,田英国,邓科.一种改进的星载GPS周跳探测与修复方法[J].全球定位系统,2017,42(2):32-36. |
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| 作者姓名： | 陈逸伦 郝金明 于合理 田英国 邓科 |
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| 作者单位： | 1.信息工程大学 导航与空天目标工程学院,河南 郑州 450001 |
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| 摘 要： | 周跳探测与修复是星载GPS数据预处理的重要内容。首先使用SWARM卫星实测数据对TurboEdit算法的有效性进行了分析,针对算法在观测噪声较大情况下无法有效探测小周跳的问题,提出了一种改进算法。该算法利用载波相位观测值对伪距组合观测值进行平滑,降低了观测噪声对宽巷模糊度的影响,提高了周跳探测能力。实验结果表明,改进算法能够有效提高小周跳的探测能力。
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| 关 键 词： | 星载GPS数据预处理 小周跳探测与修复 TurboEdit 载波相位平滑 |
| 收稿时间： | 2016-10-27 |
A Improved Cycle Slip Detection and Repair Method for On board GPS Data |
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| Affiliation: | Institute of Navigation and Aerospace Target, University of Information Engineering, Zhengzhou, 450001 China2.Beidou Navigation Technology Collaborative ]Innovation Center of Henan, Zhengzhou 450001, China |
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| Abstract: | Cycle slip detection and repair is an essential part of on board Global Positioning System (GPS) data pre processing. In this contribution, the effectiveness of TurboEdit algorithm is firstly analyzed using on board GPS data observed by Swarm satellite. After that, an improved method is proposed, considering that TurboEdit algorithm can not detect small cycle slips when the observation noise is large. This new method uses carrier phase to smooth combined pseudorange observations and therefore reduces the impact observation noise laid on wide lane ambiguity and improves the capability of cycle slip detection. The method is tested and results show that it can effectively detect and repair small cycle slip. |
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