Construction and development of satellite navigation augmentation systems
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摘要: 自卫星导航系统诞生以来，人们发展了多种增强技术和手段，并建立了大批增强系统，以满足用户更高精度和完好性的需求.由于卫星导航增强技术客观上晚于基本系统出现，且都是按需独立建立，因此不可避免地存在着“碎片”和“补丁”式发展问题，相互之间功能重叠，缺乏统一的规划和标准，未成体系化建设.本文回顾和总结了卫星导航增强技术的产生和发展历程，梳理了相关技术内涵与定义，并重点介绍了中国北斗卫星导航系统（BDS）增强体系的建设和发展情况.在此基础上，结合5G通信、低轨卫星等新兴技术，对卫星导航增强体系未来发展动态进行了展望和分析，并对未来北斗定位、导航与授时（PNT）综合服务中的增强体系建设提出了建议.Abstract: Since the birth of satellite navigation system, a variety of enhancement technologies and means are developed, and a large number of enhancement systems are established to meet the needs of users with higher accuracy and integrity. However, as a matter of fact, they are generated later than the basic system and built independently on the respective demands, there are problems of “fragmentation” and “patch” development, functional overlap with each other, lack of unified planning and standards, and unsystematic construction. This paper reviews and summarizes the generation and development process of satellite navigation augmentation technology, combings the relevant technical connotation and definition, and focuses on the related construction and development of China BeiDou Satellite navigation system augmentation system. On this basis, combined with emerging technologies such as 5G communication and loworbit satellites, the future development of satellite navigation augmentation system is prospected and analyzed. Finally, suggestions are made for the augmentation system construction of the future BeiDou positioning, navigation and timing (PNT) comprehensive service.
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