| 海上动态GNSS浮标的周跳处理算法 |
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| 引用本文： | 孔 超,雷孟飞,周俊华.海上动态GNSS浮标的周跳处理算法[J].全球定位系统,2019,44(6):116. |
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| 作者姓名： | 孔 超 雷孟飞 周俊华 |
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| 作者单位： | 湖南联智桥隧技术有限公司,湖南 长沙, 410000 |
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| 摘 要： | 常规全球卫星导航系统（GNSS）周跳探测方法大多忽略了高度角对多路径误差以及观测噪声的影响．由于海上GNSS浮标的数据质量受海面影响很大,在卫星高度角降低时其观测噪声和多路径误差显著增大,且具有高频周跳特点,常规GNSS周跳探测方法并不适用．据此,提出了一种综合电离层总电子含量变化率（TECR）和顾及高度角加权阈值模型的改进双频码相组合（MW）探测法的周跳探测与修复方法．实验结果表明:该方法能有效抑制低高度角和多路径影响带来的信号噪声,准确探测到各种类型周跳,可有效应用于海上GNSS浮标的数据预处理.
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| 关 键 词： | GNSS浮标 周跳探测 TurboEdit TECR MW |
A cycle-slip detection and repair method for? dynamic GNSS buoy on the ocean |
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| Affiliation: | Hunan LianZhi Bridge and Tunnel Technology Co., Ltd.,Changsha 410000,China |
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| Abstract: | The data quality of GNSS buoy working in the sea is ususlly influenced by the dynamic sea surface, The measurement noise and multipath error are significantly increased, and cycle occurs more frequently, especially when the satellite is at low elevation. The conventional GNSS cycle slip detection method always neglect the effects of multipath error and observation noises and take no account of error caused by satellite elevation when detecting and repair the the GNSS data. Thus, the conventional GNSS cycle slip detection method is not applicable for GNSS buoy. In this paper, the author proposed a combined cycle-slip detection method based on TECR and an improved M-W measurement that taking into account the satellite elevation angle.The experiment results indicate that the method can significantly reduce error caused by satellite elevation and multipath and can accurately detect and repair all the simulated cycle slips. Thus,It’s an effective method for data preprocessing applied to marine GNSS buoys. |
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