实时精密卫星钟轨完好性服务初步性能评估

王柳淇, 李亮, 陈雷, 王宁波, 李子申, 马卫天华, 李敏, 刘学

王柳淇, 李亮, 陈雷, 王宁波, 李子申, 马卫天华, 李敏, 刘学. 实时精密卫星钟轨完好性服务初步性能评估[J]. 武汉大学学报 ( 信息科学版). DOI: 10.13203/j.whugis20240396
引用本文: 王柳淇, 李亮, 陈雷, 王宁波, 李子申, 马卫天华, 李敏, 刘学. 实时精密卫星钟轨完好性服务初步性能评估[J]. 武汉大学学报 ( 信息科学版). DOI: 10.13203/j.whugis20240396
WANG Liuqi, LI Liang, CHEN Lei, WANG Ningbo, LI Zishen, MA Weitianhua, LI Min, LIU Xue. Preliminary Performance Evaluation of Integrity Service for Real-Time Precise Satellite Orbit and Clock[J]. Geomatics and Information Science of Wuhan University. DOI: 10.13203/j.whugis20240396
Citation: WANG Liuqi, LI Liang, CHEN Lei, WANG Ningbo, LI Zishen, MA Weitianhua, LI Min, LIU Xue. Preliminary Performance Evaluation of Integrity Service for Real-Time Precise Satellite Orbit and Clock[J]. Geomatics and Information Science of Wuhan University. DOI: 10.13203/j.whugis20240396

实时精密卫星钟轨完好性服务初步性能评估

基金项目: 

国家重点研发计划(2021YFB3901300);国家自然科学基金(62373117)。

详细信息
    作者简介:

    王柳淇,博士生,研究方向为GNSS空间信号误差完好性监测。wangliuqi@hrbeu.edu.cn

    通讯作者:

    李亮,博士,教授,博士生导师。liliang@hrbeu.edu.cn

Preliminary Performance Evaluation of Integrity Service for Real-Time Precise Satellite Orbit and Clock

  • 摘要: 实时精密卫星钟轨修正产品是实时精密单点定位(real-time precise point positioning,RT-PPP)的基础支撑信息,卫星钟轨修正产品异常将导致RT-PPP导航定位结果不再可靠,严重制约RT-PPP在生命安全相关领域的应用。传统针对RT-PPP完好性监测的研究主要关注于用户终端,要求用户终端承担较多的完好性预算并具备较强的计算能力,未完全发挥云端主控站在实时完好性监测层级的作用。针对此,构建“播发前-播发后”协同的实时精密卫星钟轨完好性服务架构,通过多站联合的异常检测与完好性边界评估,生成满足完好性风险与连续性风险需求的完好性信息,并实时播发给服务用户,形成实时精密卫星钟轨完好性服务。基于所构建山东省完好性监测站网实时数据流与CNES实时卫星钟轨修正产品提供实时精密卫星钟轨完好性服务,并以CODE最终产品为参考初步评估所提供完好性服务性能,实验结果表明所播发实时卫星钟轨质量标识可有效刻画实时卫星钟轨修正产品误差,完好性监测的可用性优于99.99%。
    Abstract: Objectives: Integrity monitoring is crucial for ensuring the reliability of real-time precise point positioning (RT-PPP). Traditional studies primarily focus on the user-level integrity monitoring, while the master station is usually employed for the determination of integrity parameters used for the user-level integrity monitoring. This approach places a significant burden of integrity on the user level and requires substantial processing capabilities, failing to fully utilize the role of master station in integrity monitoring. Currently, several analysis centers publicly provide real-time precise satellite orbit and clock correction products. The format protocol of radio technical commission for maritime service (RTCM) has reserved slots for integrity information of the satellite orbit and clock correction products. However, to our knowledge, none of the analysis center has yet publicly provided integrity services for real-time precise satellite orbit and clock correction products. Methods: This contribution constructs a pre- and post-broadcast monitoring architecture for integrity service of real-time precise satellite orbit and clock correction products. The quality indicator is first determined by employing the CDF overbounding approach. Then, a multi-station cooperative monitoring including fault detection and integrity bound evaluation is developed. The quality indicator is assessed to meet the required integrity risk and continuity risk. Finally, the integrity information is encoded in RTCM and broadcast to users via NTRIP. Results: Based on the data stream from the established integrity monitoring network in Shandong Province and the real-time correction products provided by CNES, the integrity services for real-time precise satellite orbit and clock are provided. The performance of the provided integrity services is preliminarily evaluated using the CODE final satellite orbit and orbit correction products as a reference. The experimental results indicate that the availability of integrity monitoring of the real-time precise satellite orbit and clock correction products exceeds 99.99%. Conclusions: The quality indicator provided by the integrity service for real-time precise satellite orbit and clock can effectively characterize the errors of satellite orbit and clock correction products.
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出版历程
  • 收稿日期:  2024-12-26

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