PPP-RTK修正产品矢量化完好性监测方法
Vectorized integrity monitoring method for PPP-RTK correction prod-ucts
李亮 1王柳淇 1王宁波 2李敏 1李子申 3杜丰泽 1庞帅 1那志博1
作者信息
- 1. 哈尔滨工程大学智能科学与工程学院,黑龙江哈尔滨 150001
- 2. 中国科学院空天信息创新研究院,北京 100094
- 3. 中国科学院空天信息创新研究院,北京 100094;齐鲁空天信息创新研究院,山东济南 250132
- 折叠
摘要
PPP-RTK修正产品是实现卫星导航高精度、快收敛精密定位的基础信息,完好性监测是保障PPP-RTK 导航定位可靠性的核心关键.传统PPP-RTK修正产品完好性监测方法存在风险概率分配体系不完善及多重风险源监测灵敏度不足的问题,导致PPP-RTK修正产品的可用性较低.针对此,本文提出了PPP-RTK修正产品矢量化完好性监测方法,基于最优保护水平准则分配PPP-RTK修正产品完好性与连续性指标,设计PPP-RTK修正产品"播发前-播发后"测距域与定位域协同的序贯监测架构,形成面向载波相位层级的矢量分类监测与多站综合监测,实现PPP-RTK修正产品高灵敏、高可用的矢量化完好性监测.仿真与实测数据的分析结果表明,PPP-RTK修正产品矢量化完好性监测方法监测灵敏度与可用性均优于传统方法,可用性可达到99％以上.
Abstract
PPP-RTK correction products serve as fundamental information for achieving the satellite navigation-based positio-ning with high-precision and rapidly convergence simultaneously.Integrity monitoring is a core requirement for ensuring the re-liability of PPP-RTK positioning.The traditional integrity monitoring methods for PPP-RTK correction products suffer from the lack of the monitoring risks allocation tree and the low sensitivity in monitoring multiple faults.These shortcomings cause a decreased availability of the PPP-RTK correction products.In this contribution,a vectorized integrity monitoring method is proposed for PPP-RTK correction products.Based on the minimum protection level criteria,the integrity and continuity risk of PPP-RTK correction products has been allocated.A sequential pre-and post-broadcasting loopback monitoring architecture has been developed in the range domain and the position domain,respectively.The proposed method,implemented with carrier phase observations,incorporates vectorized classification and monitoring,along with the executive monitoring the results of multiple stations.The proposed vectorized integrity monitoring method enhances the sensitivity and availability of the integrity monitoring for PPP-RTK correction products.Analysis of simulation and real-world data indicates that the proposed method outperforms traditional methods in both sensitivity and availability,achieving at least 99％of availability.
关键词
PPP-RTK/修正产品/完好性监测/矢量化/可用性Key words
PPP-RTK/correction products/integrity monitoring/vectorization/availability引用本文复制引用
基金项目
国家重点研发计划(2021YFB3901300)
国家自然科学基金(62373117)
出版年
2024
NETL
NSTL
万方数据