政府报告白皮书中英文翻译：《中国北斗卫星导航系统》

　　(三)北斗系统的发展特色

　　(III) Characteristics of the BDS

　　北斗系统的建设实践，实现了在区域快速形成服务能力、逐步扩展为全球服务的发展路径，丰富了世界卫星导航事业的发展模式。

　　The BDS development follows a model of developing regional service capacities, then gradually extending the service globally. This practice has enriched the development models for navigation satellite systems worldwide.

　　北斗系统具有以下特点：一是北斗系统空间段采用三种轨道卫星组成的混合星座，与其他卫星导航系统相比高轨卫星更多，抗遮挡能力强，尤其低纬度地区性能特点更为明显。二是北斗系统提供多个频点的导航信号，能够通过多频信号组合使用等方式提高服务精度。三是北斗系统创新融合了导航与通信能力，具有实时导航、快速定位、精确授时、位置报告和短报文通信服务五大功能。

　　The BDS possesses the following characteristics: First, its space segment is a hybrid constellation consisting of satellites in three kinds of orbits. In comparison with other navigation satellite systems, the BDS operates more satellites in high orbits to offer better anti-shielding capabilities, which is particularly observable in terms of performance in the low-latitude areas. Second, the BDS provides navigation signals of multiple frequencies, and is able to improve service accuracy by using combined multi-frequency signals. Third, the BDS integrates navigation and communication capabilities for the first time, and has five major functions - real-time navigation, rapid positioning, precise timing, location reporting and short message communication services.

　　(四)持续提升北斗系统性能

　　(IV) Improvement of BDS Performance

　　为满足日益增长的用户需求，北斗系统将加强卫星、原子钟、信号体制等方面的技术研发，探索发展新一代导航定位授时技术，持续提升服务性能。

　　To meet the increasing user demand, BDS technical research and development in the areas of satellites, atomic clocks and signals will be strengthened, and a new generation of navigation, positioning and timing technologies will be explored to improve service performance.

　　——提供全球服务。发射新一代导航卫星，研制更高性能的星载原子钟，进一步提高卫星性能与寿命，构建稳定可靠的星间链路;增发更多的导航信号，加强与其他卫星导航系统的兼容与互操作，为全球用户提供更好的服务。

　　– Providing global services. China will launch new-generation navigation satellites, develop airborne atomic clocks with enhanced performance, further improve the performance and lifetime of satellites, and build more stable and reliable inter-satellite links. It will broadcast additional navigation signals, and enhance the compatibility and interoperability with other navigation satellite systems, so as to provide better services for global users.

　　——增强服务能力。大力建设地面试验验证系统，实现星地设备全覆盖测试验证;持续建设完善星基和地基增强系统，大幅提高系统服务精度和可靠性;优化位置报告及短报文通信技术体制，扩大用户容量，拓展服务区域。

　　– Strengthening service capabilities. China will establish a grounded test and validation bed to accomplish the full coverage of tests and validation for space and ground equipment; continue to build and improve satellite based and ground based augmentation systems to substantially enhance BDS service accuracy and reliability; optimize the technical system of location reporting and short message communication to expand user volume and service coverage.

　　——保持时空基准。北斗系统时间基准(北斗时)，溯源于协调世界时，时差信息在导航电文中发播;推动与其他卫星导航系统开展时差监测，提高兼容与互操作。发展基于北斗系统的全球位置标识体系，推动北斗系统坐标框架与其他卫星导航系统的互操作，并不断精化参考框架。

　　– Maintaining spatio-temporal reference. The BDT is related to the Coordinated Universal Time, and the time bias information is broadcast in the navigation message. China will push forward the clock bias monitoring with other navigation satellite systems, and improve their compatibility and interoperability. It will develop a BDS-based worldwide location identification system, increase the interoperability between BDS coordinate frame and that of other navigation satellite systems, and constantly refine the reference frame.

　　三、提供可靠安全的卫星导航服务

　　III. Reliable and Safe Satellite Navigation Services

　　中国承诺采取多项措施保障系统安全稳定运行，为用户免费提供连续、稳定、可靠的公开服务。

　　China is committed to ensuring the safe and reliable operation of the BDS by taking multiple measures, and to providing continuous, stable and reliable open services to users free of charge.

　　(一)保障北斗系统安全稳定运行

　　(I) Ensuring Safe and Reliable BDS Operations

　　——完善运行管理机制。完善北斗系统空间段、地面段、用户段的多方联动的常态化机制，不断提高大型星座系统的运行管理保障能力。

　　– Improving the management mechanism on operation. Perfecting a normalized multi-party response mechanism for BDS space segment, ground segment and user segment. Continuously enhancing the capability of assurance to manage the operation of large-scale constellations.

　　——建立监测评估网络。建设全球连续监测评估系统，积极开展国际合作，广泛利用国际资源，对北斗系统星座状态、信号精度、信号质量和系统服务性能等进行全方位的监测和评估，为用户应用提供参考。

　　– Establishing a GNSS monitoring and assessment network. Constructing an international GNSS Monitoring and Assessment System, actively implementing international cooperation, extensively exploiting international resources, carrying out monitoring and assessment of the constellation status, signal accuracy, signal quality and service performance of the BDS at every scale, and providing references for users’ applications.

　　——采取冗余备份手段。采用卫星在轨、地面备份策略，避免和降低卫星突发在轨故障对系统服务性能的影响;采用地面设施的冗余备份设计，着力消除薄弱环节，增强系统可靠性。

　　– Taking a redundant and backup approach. Adopting a satellite backup strategy both in-orbit and on-ground to reduce and avoid the effects of emergent in-orbit satellite fault affecting service performance. Redundant and backup design is adopted to enable ground facilities to eliminate weak links, and to enhance BDS reliability.

　　(二)提供免费的公开服务

　　(II) Providing Open Services Free of Charge

　　目前，正在运行的北斗二号系统发播B1I和B2I公开服务信号，免费向亚太地区提供公开服务。服务区为南北纬55度、东经55度到180度区域，定位精度优于10米，测速精度优于0.2米/秒，授时精度优于50纳秒。

　　Currently, B1I and B2I open service signals are being broadcast by the operating BDS-2 to provide open services to the Asia-Pacific region free of charge. The services cover an area extending 55 degrees North-55 degrees South and 55 degrees East-180 degrees East, with positioning accuracy less than 10 meters, velocity measurement accuracy less than 0.2 meter per second, and timing accuracy less than 50 nanoseconds.

　　(三)及时发布系统信息

　　(III) Disseminating BDS Information in a Timely Manner

　　——发布北斗系统公开服务信号文件，为全球研发北斗应用产品提供输入。目前，已发布B1I、B2I信号接口控制文件，定义了北斗二号系统卫星与用户终端之间的接口关系，规范了信号结构、基本特性、测距码、导航电文等内容;已发布公开服务性能规范，定义了北斗二号系统服务覆盖范围、精度、连续性、可用性等性能指标。后续，将结合北斗系统建设发展持续更新和发布。

　　– Publishing BDS documents related to open services and signals to provide inputs for global BDS product development efforts. The Interface Control Document of B1I and B2I signals has been published, which defines the interface specifications between the BDS-2 satellites and user terminals. It specifies the signal structures, basic characteristics, ranging codes, NAV messages and other contents. The Open Service Performance Standard has been published, which defines the service coverage area, accuracy, continuity, availability, and other performance indexes of the BDS-2. In the future, related documents will be updated and published in step with BDS construction and development.

　　——建立多渠道信息发布机制。适时召开新闻发布会，权威发布北斗系统发展重要信息;通过北斗官方网站(网址www.beidou.gov.cn)，及时更新系统建设、运行、应用、国际合作等方面最新动态;在采取可能影响用户服务的计划之前，向国际社会提前发布通告。

　　– Establishing a multi-channel information dissemination mechanism. China holds news conferences when appropriate to disseminate important information about BDS development, and releases the latest news of the system in a timely manner through the official BDS website (www.beidou.gov.cn) from the aspects of system construction, operation, application, and international cooperation. It also issues notifications worldwide in advance before carrying out plans which might affect user services.

　　(四)保护卫星导航频谱使用

　　(IV) Protecting the Utilization of Radio-Navigation Satellite Frequency Spectrum

　　——依法保护卫星导航频谱。根据国家无线电频谱保护法律法规，保护北斗系统频谱使用，保障北斗系统运行和用户使用安全。

　　– Protecting the radio-navigation satellite frequency spectrum according to law. China protects the utilization of BDS frequency spectrum, and ensures the safety of BDS operation and BDS users pursuant to the national laws and regulations regarding the radio frequency spectrum.

　　——坚决抵制有害干扰。严禁生产、销售或使用卫星导航非法干扰设备，依法查处任何影响系统运行和服务的恶意干扰行为。

　　– Firmly rejecting harmful interference. China prohibits the production, sale and use of illegal interference devices, investigates and punishes in accordance with the law any hostile interference actions which affect the system operations and services.

　　四、推动北斗系统应用与产业化发展

　　IV. BDS Application and Industrial Development

　　中国积极培育北斗系统的应用开发，打造由基础产品、应用终端、应用系统和运营服务构成的北斗产业链，持续加强北斗产业保障、推进和创新体系，不断改善产业环境，扩大应用规模，实现融合发展，提升卫星导航产业的经济和社会效益。

　　China strives to enhance BDS application development, in an effort to build a BDS industrial chain which comprises the basic products, application terminals, application systems and operational services, keeps strengthening BDS-related industrial supporting, promotion and innovation systems, continuously improves the industrial environment, expands the application scale for integrated development, and increases the economic and social benefits of the satellite navigation industry.

　　(一)构建产业保障体系

　　(I) Establishing an Industrial Supporting System

　　——出台有关产业政策。中国已制定了卫星导航产业发展规划，对卫星导航产业中长期发展进行了总体部署,鼓励国家部门与地方政府出台支持北斗应用与产业化发展的有关政策。

　　– Industrial policies. China has formulated development plans for the satellite navigation industry, making overall arrangement for medium- and long-term satellite navigation industrial development, and encourages competent departments and local governments to enact relevant policies to support BDS application and industrial development.

　　——营造公平的市场环境。努力建立竞争有序的导航产业发展环境，提高资源配置效益和效率;鼓励并支持国内外科研机构、企业、高等院校和社会团体等组织，积极开展北斗应用开发，充分释放市场活力。

　　– Equitable market environment. China is making efforts to build a development environment for the satellite navigation industry marked by orderly competition, and increase the efficiency and effectiveness of resource allocation. It encourages and supports domestic and overseas organizations, including scientific research institutions, enterprises, colleges, universities and social organizations, to actively develop BDS applications, and fully release market vitality.

　　——加强标准化建设。2014年，成立了全国北斗卫星导航标准化技术委员会，建立并完善北斗卫星导航标准体系，推动标准验证与实施，着力推进基础、共性、急需标准的制(修)订，全面提升卫星导航标准化发展的整体质量效益。

　　– Standardization process. In 2014, the National Technical Committee on BeiDou Satellite Navigation of Standardization Administration of China was established, and the BeiDou Satellite Navigation Standard System was set up, which has been constantly improved. China promotes the standards verification and implementation, and expedites the formulation and revision of standards which are fundamental, generally applicable and in urgent need, so as to enhance the quality and benefits of the procedure-based development of satellite navigation.

　　——构建产品质量体系。着力建立健全卫星导航产品质量保障公共服务平台，积极推进涉及安全领域的北斗基础产品及重点领域应用产品的第三方质量检测、定型及认证，规范卫星导航应用服务和运营，培育北斗品牌。逐步建立卫星导航产品检测和认证机构，强化产品采信力度，促进北斗导航产品核心竞争力的全面提升，推动北斗导航应用与国际接轨。

　　– Product quality system. China is working to establish and improve a public service platform for satellite navigation product quality assurance. It also actively promotes third-party quality test, type approval and authentication efforts of BDS basic products used in the security sector and application products in key fields. It is regularizing satellite navigation application services and operations, and cultivating the BeiDou brand. It aims to gradually establish satellite navigation product test and authentication institutions, strengthen admissibility of third-party certification, promoting the upgrading of the core competitiveness of BDS products on all scales, and pushing forward BDS applications in line with international conventions.

　　——建设位置数据综合服务体系。基于北斗增强系统，鼓励采取商业模式，形成门类齐全、互联互通的位置服务基础平台，为地区、行业和大众共享应用提供支撑服务。

　　– Comprehensive service system of location data. China welcomes commercial operation to be introduced to help build the basic platform of location service based on its BDS augmentation systems, which will have extensive coverage of application fields and interconnections, and provide support services to different regions and industries and to public customers.

　　(二)构建产业应用推进体系

　　(II) Establishing an Industrial Application Promotion System

　　——推行国家关键领域应用。在涉及国家安全和国民经济发展的关键领域，着力推进北斗系统及兼容其他卫星导航系统的技术与产品的应用，为国民经济稳定安全运行提供重要保障。

　　– Application in key sectors. Great efforts are being made to promote the application of BDS technologies and products, which are compatible with other systems, in the key sectors related to national security and economy, to provide important assurance for the steady and safe running of the national economy.

　　——推进行业/区域应用。推动卫星导航与国民经济各行业的深度融合，开展北斗行业示范，形成行业综合应用解决方案，促进交通运输、国土资源、防灾减灾、农林水利、测绘勘探、应急救援等行业转型升级。鼓励结合“京津冀协同发展”“长江经济带”以及智慧城市发展等国家区域发展战略需求，开展北斗区域示范，推进北斗系统市场化、规模化应用，促进北斗产业和区域经济社会发展。

　　– Industrial and regional applications. China is pushing forward close integration between satellite navigation and each industry in the national economy, carrying out demonstrations of BDS industrial applications, formulating comprehensive application solutions for industries, and promoting transformation and enhancement in the areas of transportation, national land resources, disaster prevention and reduction, agriculture, forestry and water conservancy, surveying and exploration, and emergency response and rescue. It encourages BDS regional application demonstrations to meet the requirements of the state strategies on regional development, such as the “Coordinated Development for the Beijing-Tianjin-Hebei Region,” the building of “Yangtze River Economic Zone” and the development of smart cities. It is also promoting commercial and large-scale BDS applications, and enhancing BDS-related industries, as well as regional economic and social development.

　　——引导大众应用。面向智能手机、车载终端、穿戴式设备等大众市场，实现北斗产品小型化、低功耗、高集成，重点推动北斗兼容其他卫星导航系统的定位功能成为车载导航、智能导航的标准配置，促进在社会服务、旅游出行、弱势群体关爱、智慧城市等方面的多元化应用。

　　– Mass market application. The goal is to produce miniaturized, low power-consuming and highly-integrated BDS-related products, oriented to the mass market in the sectors of smart phones, vehicle-borne terminals and wearable devices. The focus is on pushing forward the adoption of satellite navigation and positioning functions based on the BDS and other compatible systems as a standard configuration in the fields of vehicle-borne and intelligent navigation, and promoting diversified applications in social services, transportation, caring for vulnerable groups, and smart cities.