The wide area precise positioning system (WAPPS) is a high-precision positioning system based on a global navigation satellite system. Using a GEO satellite or a communication network, it provides users, in its service area, with real-time satellite orbit, clock, and other corrections. Users can achieve centimeter-level static positioning or decimeter-level kinematic positioning by precise point positioning. With the demands for applications of both high-precision and safety of life in real time, WAPPS is facing urgent needs to improve its service integrity. This study presents a real-time integrity monitoring approach for WAPPS. Using dual-frequency ionosphere-free corrections of GPS and BDS, along with monitor station data, related error models are established and the integrity monitoring is achieved, based on the analysis of satellite corrected residuals. In addition, satellite faults are simulated for performance verification. The results show that the algorithm can monitor both step and drift faults effectively and alert users in time.

中文翻译：

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实时完整性监控，用于广域精确定位系统

广域精确定位系统（WAPPS）是基于全球导航卫星系统的高精度定位系统。通过使用GEO卫星或通信网络，它可以在其服务区域内为用户提供实时卫星轨道，时钟和其他校正。用户可以通过精确的点定位来实现厘米级的静态定位或分米级的运动定位。随着对实时和高精度生活应用的需求，WAPPS迫切需要改善其服务完整性。这项研究提出了一种用于WAPPS的实时完整性监视方法。利用GPS和BDS的无双频电离层校正以及监测站数据，建立了相关的误差模型并实现了完整性监测，基于对卫星校正残差的分析。另外，模拟卫星故障以进行性能验证。结果表明，该算法可以有效地监测阶跃和漂移故障，并及时提醒用户。