| 北斗星基增强系统性能提升初步评估 |
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| 引用本文： | 陈俊平,胡一帆,张益泽,周建华.北斗星基增强系统性能提升初步评估[J].同济大学学报(自然科学版),2017,45(7):1075-1082. |
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| 作者姓名： | 陈俊平 胡一帆 张益泽 周建华 |
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| 作者单位： | 中国科学院 上海天文台，上海 200030；中国科学院大学,北京 100049,中国科学院 上海天文台，上海 200030；同济大学 测绘与地理信息学院，上海 200092,中国科学院 上海天文台，上海 200030；同济大学 测绘与地理信息学院，上海 200092,北京卫星导航中心，北京 100049 |
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| 基金项目： | 国家“八六三”高技术研究发展计划（2014AA123102）;国家自然科学基金项目（11673050，11273046） |
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| 摘 要： | 介绍了北斗星基增强系统及广域差分改正数算法.采用10个测站6d的相位平滑伪距和相位观测数据,初步评估了北斗星基增强系统性能提升后的用户定位性能.结果表明:用户相位平滑伪距增强定位精度在东、北和天顶3个方向上分别达到0.3m、0.4m和0.8m,相对于普通导航平均三维提高了53%;基于精密单点定位技术的用户相位增强定位坐标平均在7min内收敛到1m以内,收敛之后水平坐标精度能达到0.1m,高程坐标精度能达到0.2m,两项指标都优于基于外部后处理精密轨道钟差的精密单点定位结果.
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| 关 键 词： | 北斗卫星导航定位系统 星基增强系统 广域差分信息 实时动态精密单点定位 |
| 收稿时间： | 2016/9/1 0:00:00 |
| 修稿时间： | 2017/5/11 0:00:00 |
Preliminary Evaluation of Performance of BeiDou Satellite based Augmentation System |
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| CHEN Junping,HU Yifan,ZHANG Yize and ZHOU Jianhua.Preliminary Evaluation of Performance of BeiDou Satellite based Augmentation System[J].Journal of Tongji University(Natural Science),2017,45(7):1075-1082. |
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| Authors: | CHEN Junping HU Yifan ZHANG Yize and ZHOU Jianhua |
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| Institution: | Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China; University of Chinese Academy of Sciences, Beijing 100049, China,Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China; College of Surveying and Geo Informatics, Tongji University, Shanghai 200092, China,Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China; College of Surveying and Geo Informatics, Tongji University, Shanghai 200092, China and Beijing Satellite Navigation Center, Beijing 100049, China |
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| Abstract: | BeiDou navigation satellite system (BDS) integrates legacy PNT and authorized differential service, where differential service is provided by the satellite based augmentation system (SBAS). The latest progress of the BDS SBAS development were introduced and the performance of pseudo range based and carrier phase based user differential positioning was evaluated. Observations of 10 stations in Chinese mainland were used. The results show that the coordinate accuracy of the pseudo range differential positioning (SBAS SPP) reaches 0.4 m, 0.3 m and 0.8 m in the North, East and Up directions respectively, which shows an improvement of 53% over the legacy SPP. For the evaluation of carrier phase based positioning, kinematic precise point positioing (SBAS PPP) was performed and compared to the kinematic PPP results based on post processing precise satellite orbits and clocks (POST PPP). The results show that the SBAS PPP kinematic coordinate estimates converge to 1 meter in 7 mins on average and the coordinate accuracy reaches 0.1 meter in horizontal and 0.2 meter in vertical component after convergence. Compared to the results of POST PPP, SBAS PPP shows better accuracy and shorter converge time, which indicates that the accuracy of BDS satellite orbits has been increased and clocks still have to be improved. |
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| Keywords: | BeiDou satellite navigation system satellite based augmentation system wide area differential information real time kinematic PPP |
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