天基信息实时智能服务系统（PNTRC）是指卫星通信、卫星导航与卫星遥感集成的下一代天基系统，通过多载荷集成、多星协同、天地网络互联，依托智能移动终端将数据和信息按需地送达各类军民用户，服务于国民经济与国防建设主战场。本文从PNTRC的重大战略需求入手，梳理了国内外卫星通信、卫星导航、卫星遥感的发展现状，凝练了我国天基信息系统存在的问题，阐述了PNTRC基本概念、建设目标和技术体系，在分析PNTRC与现有（或规划中）天基系统的关联关系的基础上，论证了相应系统建设的可行性。研究提出，系统建设按照“先局部、再区域、到全球”的路线图，可采取“三步走”策略；系统建设应纳入国家科技发展的总体规划，采用军民共建共享共用的运行模式；系统建设应加强与现有和规划中的“通导遥”卫星及地面通信系统的对接与融合。

Real-time and intelligent space-based information service system is a next-generation space-based system that integrates satellite communications, satellite navigation, and satellite remote sensing. It delivers space-based information to civil and military users as required in real time, relying on multi-load integration, multi-satellite collaboration, and interconnection between space and ground networks. This paper first analyzes the strategic requirements for real-time and intelligent space-based information services, then reviews the development status of satellite communications, satellite navigation, and satellite remote sensing in China and abroad, and summarizes the existing problems. Moreover, it expounds the basic concept, objectives, and technical architecture of the real-time and intelligent space-based information service system, and analyzes the relationship between this system and the existing (or planned) space-based information system, thus demonstrating its feasibility for construction. The real-time intelligent space-based information service system can be established through three steps and developed first locally, then regionally, and finally globally. This system should be incorporated into the overall planning for national science and technology development, and be constructed and shared mutually by civil and military parties. During the construction of this system, communicating and integration with existing and planned communications, navigation, and remote sensing satellites as well as with the ground communication systems should be strengthened.