GNSS real-time cycle slip repair algorithm and PPP test analysis
-
摘要: 全球卫星导航系统(GNSS)能够为用户提供定位、导航和授时(PNT)服务,被广泛应用于国防安全保障和国民经济建设中. 实时精密单点定位(RT-PPP)是一种高精度卫星导航定位方法,针对信号中断导致的重新初始化时间长的问题,提出一种基于历元间差分伪距和载波相位观测量的周跳修复算法,设计了一种RT-PPP算法,并介绍其实现流程. 采用国际GNSS服务(IGS)观测站数据进行周跳修复实验,成功率在99%以上,缩短了重新收敛时间. 在楼顶进行推车实验,RT-PPP在水平方向定位精度优于1 cm,高程定位方向精度为2~3 cm.
-
关键词:
- 全球卫星导航系统(GNSS) /
- 周跳修复 /
- 实时精密单点定位(RT-PPP) /
- 定位实验 /
- 精度评定
Abstract: Global Navigation Satellite System (GNSS) can provide users with positioning, navigation and timing services, and is widely used in national defense security and national economic construction. Real time precise point positioning (PPP) is a high precise satellite navigation positioning method, this paper discusses the current problems of the algorithm that long reinitialization time caused by signal interruption , and proposes a cycle slip repair algorithm based on the differential pseudorange and carrier phase observations. It designs a real-time precise point positioning algorithm and introduces its implementation process. The success rate of the cycle slip repair experiment using the data of the IGS observatory is more than 99%, and shorten the reconvergence time. The cart experiment was carrier out on the roof of the building, and the real-time precise point positioning accuracy was better than 1 cm in the horizontal direction, and the accuracy was 2~3 cm in the vertical direction. -
表 1 不同阶段RT-PPP定位精度统计表
cm 运动状态 N E U 静止阶段 0.69 0.65 2.39 运动阶段 0.79 0.74 3.01 -
[1] MONTENBRUCK O, STIGENBERGER P, PRANGE L, et al. The Multi-GNSS Experiment (MGEX) of the International GNSS Service (IGS) – achievements, prospects and challenges[J]. Advances in space research, 2017, 59(7): 1671-1697. DOI: 10.1016/j.asr.2017.01.011 [2] ZUMBERGE J F, HEFLIN M B, JEFFERSOND C, et al. Precise point positioning for the efficient and robust analysis of GPS data from large networks[J]. Journal of geophysical research solid earth, 1997, 102(B3): 5005-5017. DOI: 10.1029/96JB03860 [3] 李星星, 张小红, 李盼. 固定非差整数模糊度的PPP快速精密定位定轨[J]. 地球物理学报, 2012, 55(3): 833-840. [4] 施闯, 张东, 宋伟, 等. 北斗广域高精度时间服务原型系统[J]. 测绘学报, 2020, 49(3): 269-277. [5] 郭敏, 张捍卫, 夏朋飞. GNSS天顶对流层延迟的短时天气预报分析[J]. 测绘科学, 2021, 46(4): 28-36. DOI: 10.16251/j.cnki.1009-2307.2021.04.005 [6] 王伟, 臧文驰, 彭竞, 等. 基于RT-PPP的低轨卫星实时高精度时间同步方法[J]. 全球定位系统, 2021, 46(5): 26-32. DOI: 10.12265/j.gnss.2021050301 [7] 楼益栋. 导航卫星实时精密轨道与钟差确定[D]. 武汉: 武汉大学, 2008. [8] 刘腾. 多模GNSS非组合精密单点定位算法及其电离层应用研究[D]. 北京: 中国科学院大学, 2017. [9] XIAO G W, LIU G Y, OU J K, et al. MG-APP: an open-source software for multi-GNSS precise point positioning and application analysis[J]. GPS solutions, 2020, 24(3). DOI: 10.1007/s10291-020-00976-1 [10] 卢福康, 余学祥, 肖星星, 等. BDS-2/BDS-3/GPS/Galileo双频精密单点定位精度分析与评价[J]. 全球定位系统, 2022, 47(5): 35-44. [11] 张小红, 胡家欢, 任晓东. PPP/PPP-RTK新进展与北斗/GNSS PPP定位性能比较[J]. 测绘学报, 2020, 49(9): 1084-1100. [12] KOUBA J, P HEROUX. Precise point positioning using IGS orbit and clock products[J]. GPS solutions, 2001, 5(2): 12-28. DOI: 10.1007/PL00012883 [13] 张小红, 左翔, 李盼. 非组合与组合PPP模型比较及定位性能分析[J]. 武汉大学学报(信息科学版), 2013, 38(5): 561-565. [14] 刘帅, 孙付平, 张伦东, 等. INS辅助周跳修复以实现精密单点定位瞬时重新收敛[J]. 中国惯性技术学报, 2015, 23(5): 607-614. DOI: 10.13695/j.cnki.12-1222/o3.2015.05.010 [15] DING W W, OU J K. Instantaneous re-initialization of real time kinematic PPP by adding doppler observation[J]. Journal of astronautics, 2013, 34(6): 750-800. DOI: 10.3873/j.issn.1000-1328.2013.06.008 [16] 贺伟欣. GNSS实时数据获取与精密单点定位研究[D]. 北京: 中国科学院大学, 2015. [17] KHODABANDEH A. Single-station PPP-RTK: correction latency and ambiguity resolution performance[J]. Journal of geodesy, 2021, 95(4): 42. DOI: 10.1007/s00190-021-01490-z [18] 王磊, 李德仁, 陈锐志, 等. 低轨卫星导航增强技术——机遇与挑战[J]. 中国工程科学, 2020, 22(2): 144-152. [19] 朱锋. GNSS/SINS/视觉多传感器融合的精密定位定姿方法与关键技术[D]. 武汉: 武汉大学, 2019.