| 一种历元间差分单站单频周跳探测与修复方法 |
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| 引用本文： | 邹璇,李宗楠,陈亮,宋伟伟,王成,唐卫明.一种历元间差分单站单频周跳探测与修复方法[J].武汉大学学报(信息科学版),2017,42(10):1406-1410. |
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| 作者姓名： | 邹璇 李宗楠 陈亮 宋伟伟 王成 唐卫明 |
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| 作者单位： | 1.武汉大学卫星导航定位技术研究中心, 湖北 武汉, 430079 |
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| 基金项目： | 国家自然科学基金41304028国家863计划2014AA123101三峡工程鱼类资源保护重点实验室基金SXSN/4008中央高校基本科研业务费专项资金2042016kf0184中央高校基本科研业务费专项资金2042016kf0061 |
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| 摘 要： | 提出了一种基于历元间单差观测值的单站单频周跳探测与修复方法。通过假定前一历元为基准站，当前历元为流动站，采用相对定位处理模式获取当前历元观测值的验后单位权中误差，并基于抗差最小二乘获取每颗卫星的观测值残差，对单站单频数据进行周跳探测与修复。通过对实测数据的验证分析表明，按照本文方法可以100%探测周跳发生的历元。并且，当至少4颗卫星未发生周跳时，如发生异常卫星数小于可视卫星数的30%，则在95%以上的情况下可以有效确定异常卫星；当异常卫星过多时，本文方法确定异常卫星的成功率会有所下降。但是，对于探测出发生周跳的异常卫星，本文方法均可100%对其周跳进行修复。
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| 关 键 词： | 单站 单频 历元间单差 周跳探测 周跳修复 |
| 收稿时间： | 2016-04-21 |
A New Cycle Slip Detection and Repair Method Based on Epoch Difference for a Single-frequency GNSS Receiver |
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| Affiliation: | 1.GNSS Research Center, Wuhan University, Wuhan 430079, China2.Qianxun SI Inc., Shanghai 200438, China |
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| Abstract: | This paper proposes a new cycle slip detection and repair method for a single-frequency GNSS receiver based on epoch difference. Taking the previous and current epoch as base and rover station respectively, posteriori standard errors and residuals of observations were derived from relative positioning and robust estimation. Single-frequency cycle slip detection and repair were carried out as well. Analysis of experiments with measured data suggest that the success rate of detection epochs of cycle slip is 100%, and more than 95% of abnormal satellites can be detected on occasions when the number of observed satellites without cycle slips is more than four and the percentage of the satellites without cycle slips is less than 30%. With an excessive number of abnormal satellites, the success rate of detection descends correspondingly. The success rate of cycle slip repair can reach 100% based on the success of detection of cycle slips. |
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