双语-《中国北斗卫星导航系统》

双语■《中国北斗卫星导航系统》中国北斗卫星导航系统China sBeiDou Navigation Satellite System目录Contentss刖Preface

一、发展目标与原则I.Goals andPrinciples of Development

二、持续建设和发展北斗系统II.Development of the BDS

三、提供可靠安全的卫星导航服务III.Reliable andSafe Satellite Navigation Services

四、推动北斗系统应用与产业化发展IV.BDS Application and Industrial Development

五、积极促进国际合作与交流V.International Cooperation and Exchanges结束语Conclusion assessmentof theconstellation status,signal accuracy,signal quality and serviceperformanceof the BDS atevery scale,and providingreferences forusers5applications.——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 aredundant andbackup approach.Adopting asatellite backupstrategy bothin-orbitand on-ground toreduce and avoid theeffects ofemergent in-orbit satellitefault affectingserviceperformance.Redundant andbackup designis adoptedto enableground facilitiestoeliminate weaklinks,and to enhance BDSreliability.二提供免费的公开服务II ProvidingOpen ServicesFree ofCharge目前，正在运行的北斗二号系统发播B11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,B11and B2I openservice signalsare beingbroadcast by the operatingBDS-2toprovide openservices to the Asia-Pacific regionfree ofcharge.The servicescover anareaextending55degrees North-55degrees Southand55degrees East-180degrees East,withpositioning accuracy less than10meters,velocity measurementaccuracy lessthan

0.2meterper second,and timingaccuracylessthan50nanoseconds.三及时发布系统信息III DisseminatingBDS Informationin aTimely 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；己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 BDSdocuments related to openservices and signals to provide inputsfor globalBDSproduct developmentefforts.The InterfaceControl Documentof B11andB2I signalshas beenpublished,which definesthe interfacespecifications between the BDS-2satellites and user terminals.It specifiesthe signalstructures,basic characteristics,rangingcodes,NAV messagesand othercontents.The OpenService PerformanceStandard has beenpublished,which definesthe servicecoverage area,accuracy,continuity,availability,and otherperformanceindexes of the BDS-

2.In thefuture,related documentswill beupdated andpublishedin stepwith BDS construction anddevelopment.——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 amulti-channel informationdissemination mechanism.China holdsnewsconferences whenappropriate todisseminate importantinformation aboutBDS development,and releasesthe latestnews of the systemin atimely mannerthrough theofficial BDSwebsite fromthe aspectsof systemconstruction,operation,application,and international cooperation.It alsoissues notificationsworldwide in advance beforecarrying outplans whichmight affectuserservices.四保护卫星导航频谱使用IV Protecting the Utilizationof Radio-Navigation SatelliteFrequency 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一Protectingtheradio-navigation satellitefrequency spectrumaccording tolaw.China protectstheutilization of BDS frequencyspectrum,and ensuresthe safetyof BDSoperationandBDSusers pursuantto the national laws and regulationsregarding theradio frequencyspectrum.——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 rejectingharmful interference.China prohibitsthe production,sale anduse ofillegalinterference devices,investigates andpunishes inaccordance with the lawany hostileinterferenceactions whichaffect the system operationsand services.

四、推动北斗系统应用与产业化发展IV BDSApplicationandIndustrialDevelopment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 strivesto enhance BDS applicationdevelopment,in aneffort to build aBDS industrialchainwhich comprisesthe basic products,application terminals,application systemsandoperational services,keeps strengtheningBDS-related industrialsupporting,promotion andinnovation systems,continuously improvesthe industrialenvironment,expands theapplicationscale forintegrated development,and increasesthe economic and socialbenefits of thesatellite navigation industry.一构建产业保障体系V Establishing an IndustrialSupporting 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一Industrial policies.China hasformulated developmentplans for the satellite navigationindustry,making overallarrangement formedium-and long-term satellite navigation industrialdevelopment,and encouragescompetent departmentsand localgovernments toenactrelevant policiesto supportBDS applicationand industrialdevelopment.——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，充分释放市场活力一Equitable marketenvironment.China ismaking effortstobuilda developmentenvironmentfor thesatellite navigationindustry markedby orderlycompetition,and increase the efficiencyandeffectiveness ofresource allocation.It encouragesand supportsdomestic andoverseasorganizations,including scientific research institutions,enterprises,colleges,universities andsocialorganizations,to activelydevelop BDS applications,and fullyrelease marketvitality.——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.In2014,the NationalTechnical Committeeon BeiDouSatelliteNavigation ofStandardization Administrationof Chinawas established,and the BeiDouSatellite NavigationStandard Systemwas setup,which hasbeen constantlyimproved.Chinapromotes thestandards verificationand implementation,and expeditesthe formulationandrevision ofstandards which are fundamental,generally applicableand inurgent need,so astoenhance thequalityand benefits of the procedure-based development of satellitenavigation.——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 qualitysystem.China isworking toestablish and improve apublic service platform forsatellitenavigation productquality assurance.It alsoactively promotesthird-party qualitytest,type approvaland authenticationefforts of BDS basic products usedin thesecurity sectorandapplication productsin keyfields.It isregularizing satellitenavigation applicationservices andoperations,and cultivatingtheBeiDoubrand.It aimsto graduallyestablish satellitenavigationproduct testand authenticationinstitutions,strengthen admissibilityof third-party certification,promoting theupgrading of the corecompetitiveness of BDS productson allscales,andpushing forwardBDSapplicationsin linewith internationalconventions.——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 servicesystem of location data.China welcomescommercial operationto beintroducedto helpbuild thebasic platformoflocationservice basedon itsBDS augmentationsystems,which willhave extensivecoverage ofapplication fieldsand interconnections,andprovide supportservices todifferent regionsand industriesand topublic customers.

（二）构建产业应用推进体系VI Establishingan IndustrialApplication PromotionSystem——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 inkey sectors.Great effortsare beingmade topromote theapplication ofBDStechnologies andproducts,which arecompatible with other systems,in thekey sectorsrelatedto national security andeconomy,to provideimportant assurancefor thesteady andsaferunning of the nationaleconomy.——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含‘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 andregional applications.China ispushing forwardclose integrationbetweensatellite navigationand eachindustry in thenationaleconomy,carrying outdemonstrations ofBDS industrial applications,formulating comprehensive application solutionsfor industries,andpromoting transformationand enhancementin the areas oftransportation,national landresources,disaster preventionand reduction,agriculture,forestry andwater conservancy,surveying andexploration,and emergencyresponse and rescue.It encouragesBDS regionalapplicationdemonstrations to meet therequirements of the statestrategies onregionaldevelopment,such as the CoordinatedDevelopment for the Beijing-Tianjin-Hebei Region,n thebuildingof YangtzeRiver EconomicZone and the development of smartcities.It is alsopromoting commercialand large-scale BDSapplications,and enhancingBDS-relatedindustries,as wellas regionaleconomic 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 marketapplication.The goalis toproduce miniaturized,low power-consuming andhighly-integrated BDS-related products,oriented to the massmarket in the sectorsof smartphones,vehicle-bome terminalsand wearabledevices.The focusis onpushing forwardtheadoption of satellitenavigationand positioningfunctions basedon the BDS and othercompatible systemsas astandard configurationin the fields ofvehicle-borne and intelligentnavigation,and promotingdiversified applicationsin socialservices,transportation,caring forvulnerablegroups,and smartcities.三构建产业创新体系VII Establishingan IndustrialInnovative System——加强基础产品研发突破核心关键技术，开发北斗兼容其他卫星导航系统的芯片、模块、天线等基础产品，培育自主的北斗产业链-Research anddevelopment ofbasicproducts.To makebreakthroughs inkey technologies,China isdeveloping chips,modules,antennae and other basicproducts basedon the BDS andothercompatible systems,and fosteringan independentBDS industrialchain.——鼓励创新体系建设鼓励支持卫星导航应用技术重点实验室、工程技术研究中心、企业技术中心等创新载体的建设和发展，加强工程实验平台和成果转化平台能力建设，扶持企业发展，加大知识产权保护力度，形成以企业为主体、产学研用相结合的技术创新体系-Establishment ofan innovationsystem.China encouragesand supports the construction anddevelopment ofkey laboratoriesfor satellitenavigation applicationtechnologies,researchcenters ofengineering technology,technology centersof enterprises,and otherinnovativebodies,enhances thecapacity ofengineering experimentplatforms and achievementtransformation platforms,supports relevantenterprises,and makesmore effortsto protectintellectualproperty rights,so asto forma technologyinnovationsystemwhich relieson theenterpriseas themain bodyand combinesthe effortsof universities,research institutesandapplication.——促进产业融合发展鼓励北斗与互联网+、大数据、云计算等融合发展，支持卫星导航与移动通信、无线局域网、伪卫星、超宽带、自组织网络等信号的融合定位及创新应用，推进卫星导航与物联网、地理信息、卫星遥感/通信、移动互联网等新兴产业融合发展，推动大众创业、万众创新，大力提升产业创新能力-Integrated industrialdevelopment.China encouragesthe integrateddevelopment of the BDSandInternet,big data,and cloudcomputing,supportstheintegrated positioning and innovativeutilizationof satellitenavigation togetherwith mobilecommunications,WLAN,pseudo-satellites,ultra-wide bandand AdHoc Networksignals,promotes integrateddevelopment of satellitenavigation andemerging industriessuch asthe Internetof Things,geographic information,satellite remotesensing andcommunication,and mobileInternet,and encouragespeople tostarttheir ownbusinesses and make innovations,so asto vigorouslyupgrade theinnovationcapability of the industry.

五、积极促进国际合作与交流V.International Cooperationand Exchanges中国将持续推动北斗系统国际化发展，积极务实开展国际合作与交流，服务“一带一路”建设,促进全球卫星导航事业发展，让北斗系统更好地服务全球、造福人类China willpush forwardthe internationaldevelopment of the BDS,actively carryoutinternational cooperation and exchangesin this field,so asto serve the Belt and Road Initiative,promote the development ofglobal satellitenavigation,and enablethe BDSto servethe worldandbenefit mankindbetter.一加强与其他卫星导航系统的兼容共用I StrengtheningCompatibility andJoint Applicationswith OtherNavigation Satellite Systems积极推动北斗系统与其他卫星导航系统在系统建设、应用等各领域开展全方位合作与交流,加强兼容与互操作，实现资源共享、优势互补、技术进步，共同提高卫星导航系统服务水平，为用户提供更加优质多样、安全可靠的服务China activelypushes forwardthe cooperationand exchangesbetweenthe BDS and othernavigation satellite systems in the fields of systemconstruction andapplication fromallperspectives,strengthening compatibility and interoperability,achieving resourcesharing,complementarity andtechnology advancement,improving the services of navigation satellitesystems,and providingusers with more qualified,diversified,safe and reliable services.

（二）按照国际规则合法使用频率轨位资源II UtilizingFrequency andOrbital SlotResources Accordingto InternationalRules频率轨位资源是有限的、宝贵的自然资源，是卫星导航系统发展的重要基础中国按照国际电信联盟规则，通过友好协商开展北斗系统频率轨位协调，积极参与国际电信联盟规则的研究制定及有关活动，并与有关国家合作拓展卫星导航频率资源2000年以来，先后与20余个国家、地区和国际组织，300余个卫星网络进行了有效协调As limitedand valuablenatural resources,frequencies andorbital slotsprovide acriticalfoundation forthe developmentof navigation satellite systems.Adhering tothe InternationalTelecommunicationUnion ITUrules,China worksto facilitatecoordination ofBDSfrequencies andorbital slotsthrough negotiations,actively participatesintheresearch andformulationof ITUrules andother relevantactivities,and expandsradio-navigation frequencyresourcesthrough cooperationwith othernations.Since2000,China hasheld effectivecoordinationactivities onmore than300satellite networkswithmorethan20countries,regionsand international organizations.三持续推动北斗系统进入国际标准III Promotingthe Ratificationof the BDS byInternational Standards进入国际标准是北斗系统融入国际体系的重要标志中国高度重视并持续推动北斗系统进入国际标准化组织、行业和专业应用等国际组织目前，积极推动北斗系统进入国际民用航空组织、国际海事组织、移动通信国际标准组织等，并鼓励企业、科研院所和高校参与卫星导航终端和应用标准的制定2014年11月，北斗系统获得国际海事组织认可The ratificationof the BDS byinternational standardsis amilestone forthe integrationof theBDSinto internationalsystems.China sparesno effortto getthe BDSratified by theInternational Organizationfor Standardizationandotherinternational organizationsin theindustrialand professionalapplication sectors.Currently,positive effortsare beingmade toadvancethe recognitionofthe BDSinthe InternationalCivil AviationOrganization,International Maritime Organization,Third-Generation MobileCommunication StandardPartnershipProject,andotherorganizations.China advocatesthe involvementof enterprises,scientificresearch,colleges anduniversities inthe formulationof satellitenavigation terminalsandapplication standards.In November2014,the BDSgained recognitionfrom theInternationalMaritimeOrganization.

（四）积极参与国际卫星导航领域多边事务IV Participatingin MultilateralActivities inthe Fieldof International SatelliteNavigation北斗系统作为全球卫星导航系统核心系统之一，中国积极参与卫星导航国际事务，参加联合国全球卫星导航系统国际委员会ICG以及有关国际组织活动，促进学术交流与合作，贡献北斗力量，推动卫星导航应用中国高度重视并积极参加联合国工作，2012年成功主办ICG第七届大会，发起国际监测与评估、应用演示与用户体验活动等倡议，促成各卫星导航系统联合发布服务世界的共同宣言；每年举办中国卫星导航学术年会，为世界卫星导航技术与应用发展发挥积极作用The BDSis one ofthemajor GNSSproviders,and China actively participatesin internationalsatellitenavigation affairs,attends theactivities heldby theInternational Committeeon GlobalNavigationSatellite SystemsICG andother relevantinternationalorganizations,supportsacademic exchangesand cooperationin thisarea,and promotessatellite navigationapplicationswith thecontribution ofthe BDS.Chinaactivelytakes partin relevanttasks withintheorbit ofthe UnitedNations,successfully heldthe SeventhMeeting ofthe ICGin2012,whenthe proposalsfortheinternational GNSSMonitoring and Assessment and the BDS/GNSSApplication Demonstrationand ExperienceCampaign wereinitiated,and theJoint StatementofGlobal NavigationSatelliteSystemsfor servingthe wholewas issued.The ChinaSatelliteNavigation Conferenceis heldannually,and playsa positiverole inthe developmentof satellitenavigation technologies andapplications worldwide.五大力推动卫星导航国际化应用V PromotingInternationalSatelliteNavigation Applications——加强宣传普及持续开展“北斗行”系列宣传推广活动，推动建立北斗中心，让用户更好地了解北斗、感知北斗，已与多个国家合作建立北斗中心成立北斗国际交流培训中心，搭建卫星导航教育培训演示平台，持续开展学历教育、暑期学校、短期培训班和研讨会等国际教育培训活动-To intensifypublicity andpopularization inthisfield,China hasimplemented the BDS Tour”series ofevents,pushed forwardthe establishmentofBDS Centers toenable betterunderstandingofthe BDS.BDSCentershave beenjointly setup ina numberof nations.TheBeiDou InternationalExchange andTraining Centerhasbeenopened,andademonstrationplatform foreducation andtraining inthe fieldof satellitenavigation hasbeen setup.In addition,academic education,summer schools,short-term trainingcourses andsymposiums,and otherinternationaleducation andtraining activitieshave beenregularly held.——推动实施国际化工程鼓励开展国际卫星导航应用的政策、市场、法律、金融等领域的研究和咨询服务，提升国际化综合服务能力服务“一带一路”建设，与全球有意愿的国家一起，共同建设卫星导航增强系统，提供高精度卫星导航、定位、授时服务，提升北斗系统海外服务性能，促进导航技术的国际化应用通过构建高精度卫星导航、定位、授时服务运营服务平台，开展交通运输、大众旅游、海上应用、减灾救灾、精密农业等领域应用示范，带动大规模应用推广一To advanceand implementinternationalization projects,China ispromoting research andconsultancy servicesregarding thepolicies,markets,lawsandfinance relatedto internationalsatellitenavigation applications,and improvingcomprehensive internationalservicecapabilities.In linewith the Beltand RoadInitiative,China willjointly buildsatellite navigationaugmentationsystems withrelevant nations,provide highlyaccurate satellitenavigation,positioning andtiming services,improve theoverseas BDSservice performances,and promoteinternationalapplications ofnavigationtechnologies.China willalso carryout applicationdemonstrationsinthefieldsoftransportation,tourism,maritime application,disaster reductionandrelief,and agriculture,and boostapplication ona largescale,through establishinganoperation and serviceplatformfor highlyaccurate satellitenavigation,positioning andtimingservices.结束语Conclusion卫星导航系统是人类发展的共同财富，是提供全天候精确时空信息的空间基础设施，推动了知识技术密集、成长潜力大、综合效益好的新兴产业集群发展，成为国家安全和经济社会发展的重要支撑，日益改变着人类生产生活方式Navigation satellite systems arethe commonwealth ofthe developmentof mankind,and also aspace infrastructurewhich canprovide all-time precisetime andspace information.Theypromote the developmentofemerging industrialclusters thatare technology-andknowledge-intensive withhuge growthpotentials andsound comprehensivebenefits,thusbecoming criticalsupport fornationalsecurity,economicand social development,andincreasingly improve the people5s production and livingactivities.刖百Preface北斗卫星导航系统以下简称北斗系统是中国着眼于国家安全和经济社会发展需要，自主建设、独立运行的卫星导航系统，是为全球用户提供全天候、全天时、高精度的定位、导航和授时服务的国家重要空间基础设施The BeiDouNavigationSatelliteSystem hereinafterreferred toasthe BDS hasbeenindependently constructedand operatedby Chinawith aneye tothe needsofthecountry5snational securityand economicand social development.As aspace infrastructureof nationalsignificance,the BDSprovides all-time,all-weather andhigh-accuracy positioning,navigationand timingservices toglobal users.20世纪后期，中国开始探索适合国情的卫星导航系统发展道路，逐步形成了三步走发展战略2000年年底，建成北斗一号系统，向中国提供服务；2012年年底，建成北斗二号系统，向亚太地区提供服务；计划在2020年前后，建成北斗全球系统，向全球提供服务In thelate20th century,China startedto explorea pathto develop a navigationsatellite systemsuitablefor its national conditions,and graduallyformulated athree-step strategyofdevelopment:to complete the construction ofthe BDS-1and provideservices tothe wholecountrybythe end of2000;to completethe constructionofthe BDS-2and provideservices tothe Asia-Pacific regionbytheend of2012;and tocompletethe constructionoftheBDSandprovide servicesworldwide around

2020.随着北斗系统建设和服务能力的发展，相关产品已广泛应用于交通运输、海洋渔业、水文监测、气象预报、测绘地理信息、森林防火、通信时统、电力调度、救灾减灾、应急搜救等领域,逐步渗透到人类社会生产和人们生活的方方面面，为全球经济和社会发展注入新的活力Along with the developmentoftheBDS projectand serviceability,related productshave beenwidelyapplied incommunication andtransportation,marine fisheries,hydrological monitoring,weather forecasting,surveying,mapping andgeographic information,forest fireprevention,time synchronizationfor communicationsystems,power dispatching,disaster mitigationandrelief,emergency searchandrescue,andotherfields.These productsare graduallypenetratingevery aspectof socialproductionandpeoples life,injecting newvitality intotheglobal economyandsocialdevelopment.中国将坚定不移地实施北斗系统建设，不断提升系统性能，履行服务承诺坚持开放合作,加强推广普及，着力促进卫星导航在全球的广泛应用，让卫星导航更好地惠及民生福祉、服务人类发展进步China willcontinue itsBDSconstruction,improvethesystem performance,and fulfillits servicecommitments.It willpersist inopening upand cooperation,promote thepopularization inthisfield,strive toadvance satellitenavigation applicationsworldwide,andmakesatellitenavigation betterbenefit thewellbeing ofthe peopleand theprogress ofmankind.卫星导航系统是全球性公共资源，多系统兼容与互操作已成为发展趋势中国始终秉持和践行“中国的北斗，世界的北斗”的发展理念，服务“一带一路”建设发展，积极推进北斗系统国际合作与其他卫星导航系统携手，与各个国家、地区和国际组织一起，共同推动全球卫星导航事业发展，让北斗系统更好地服务全球、造福人类Navigation satellite systems arepublic resourcesshared bythe wholeglobe,and multi-systemcompatibility and interoperability hasbecome atrend.China appliesthe principlethat uThe BDSis developedby China,and dedicatedtothe worldn toservethedevelopmentofthe SilkRoadEconomic Beltand the21st CenturyMaritime SilkRoad Beltand RoadInitiative55for short,and activelypushes forwardinternational cooperationrelatedtotheBDS.As theBDS joinshandswith other navigationsatellite systems,China willwork withall othercountries,regionsand internationalorganizations topromote globalsatellitenavigationdevelopment andmakethe BDSbetter servetheworldandbenefitmankind.

一、发展目标与原则IGoals andPrinciples ofDevelopment中国高度重视北斗系统建设，将北斗系统列为国家科技重大专项，支撑国家创新发展战略China laysstore bytheconstructionoftheBDS,ranking itoneofits nationalkey technicalprojectsthat supportsits innovativedevelopment strategy.-发展目标IIGoals ofDevelopment建设世界一流的卫星导航系统，满足国家安全与经济社会发展需求，为全球用户提供连续、稳定、可靠的服务；发展北斗产业，服务经济社会发展和民生改善；深化国际合作，共享卫星导航发展成果，提高全球卫星导航系统的综合应用效益Building aworld-class navigationsatellitesystemtomeetthe needsofthecountrys nationalsecurityas wellas economicandsocialdevelopment,and providing continuous,stable andreliableservices for global users;developing BDS-related industriesto supportChinaseconomic andsocialdevelopment,as wellas improvementof people5s livingstandards;andenhancing international cooperation toshare thefruits ofdevelopment inthefieldofsatellitenavigation,increasing thecomprehensiveapplicationbenefits ofGlobal NavigationSatelliteSystem GNSS.二发展原则IIIPrinciples ofDevelopment中国坚持“自主、开放、兼容、渐进”的原则建设和发展北斗系统China upholdsthe principlesof Independence,openness,compatibilityandgradualness”in theBDSconstructionanddevelopment.——自主坚持自主建设、发展和运行北斗系统，具备向全球用户独立提供卫星导航服务的能力-By Independence,n it means touphold independentconstruction,development andoperationof theBDS,and acquirethe capabilityto independentlyprovide satellitenavigation services toglobal users.——开放免费提供公开的卫星导航服务，鼓励开展全方位、多层次、高水平的国际合作与交流-By openness,it meansto provideopen satellitenavigation servicesfree ofcharge,andencourage all-scale,multilevel andhigh-quality internationalcooperationandexchange.——兼容提倡与其他卫星导航系统开展兼容与互操作，鼓励国际合作与交流，致力于为用户提供更好的服务一By“compatibility,“it meanstoenhanceBDS compatibilityand interoperabilitywith othernavigationsatellite systems,and encourageinternationalcooperationand exchanges,so astoprovide better services tousers.——渐进°分步骤推进北斗系统建设发展，持续提升北斗系统服务性能，不断推动卫星导航产业全面、协调和可持续发展-By gradualness,itmeansto carryout theBDS projectstep bystep,enhanceBDSserviceperformance,and boostthedevelopmentofsatellitenavigationindustryinacomprehensive,coordinated andsustainable manner.

二、持续建设和发展北斗系统II.Development oftheBDS中国始终立足于国情国力，坚持自主创新、分步建设、不断完善北斗系统Based onitsnationalconditions,China hasindependently developedtheBDSstep bystep withconstantimprovement.-实施“三步走”发展战略I Three-Step StrategyofDevelopment——第一步，建设北斗一号系统也称北斗卫星导航试验系统1994年，启动北斗一号系统工程建设；2000年，发射2颗地球静止轨道卫星，建成系统并投入使用，采用有源定位体制，为中国用户提供定位、授时、广域差分和短报文通信服务；2003年，发射第三颗地球静止轨道卫星，进一步增强系统性能-The firststep is to constructtheBDS-1also knownas BeiDouNavigation SatelliteDemonstrationSystem.The projectwas startedin1994,andthesystem wascompleted andputinto operationin2000withthe launching oftwo GeostationaryEarth OrbitGEO satellites.With anactive-positioning scheme,thesystemprovided users in Chinawith positioning,timing,wide-area differentialand shortmessage communicationservices.The thirdGEO satellitewaslaunched in2003,which furtherenhanced thesystems performance.——第二步，建设北斗二号系统2004年，启动北斗二号系统工程建设；2012年年底，完成14颗卫星5颗地球静止轨道卫星、5颗倾斜地球同步轨道卫星和4颗中圆地球轨道卫星发射组网北斗二号系统在兼容北斗一号技术体制基础上，增加无源定位体制，为亚太地区用户提供定位、测速、授时、广域差分和短报文通信服务-The secondstep isto constructtheBDS-

2.The projectwas startedin2004,and bytheendof2012a totalof14satellites-5GEO satellites,5Inclined GeosynchronousSatellite OrbitIGSOsatellites and4Medium EarthOrbit MEO satellites-had beenlaunched tofinish thespaceconstellation deployment.Based ona technicalscheme whichwas compatible withtheBDS-1,theBDS-2added thepassive-positioning scheme,and providedusersintheAsia-Pacific regionwithpositioning,velocity measurement,timing,wide-area differentialand shortmessagecommunication services.——第三步，建设北斗全球系统2009年，启动北斗全球系统建设，继承北斗有源服务和无源服务两种技术体制；计戈U2018年，面向“一带一路”沿线及周边国家提供基本服务；2020年前后，完成35颗卫星发射组网，为全球用户提供服务-The thirdstep isto constructtheBDS.The projectwas startedin2009to inheritthe technicalschemesof bothactive andpassive services.The goalisto provide basicservices tothecountries alongtheBeltandRoadandinneighboring regionsby2018,and tocomplete theconstellationdeployment withthelaunchingof35satellites by2020toprovideservices toglobalusers.-北斗系统的基本组成II MainComposition oftheBDS北斗系统由空间段、地面段和用户段三部分组成The BDSis mainlycomprised ofthree segments:space segment,ground segmentand usersegment.——空间段北斗系统空间段由若干地球静止轨道卫星、倾斜地球同步轨道卫星和中圆地球轨道卫星三种轨道卫星组成混合导航星座-The space segment.The BDSspace segment isahybrid navigationconstellation consisting ofGEO,IGSO andMEOsatellites.——地面段北斗系统地面段包括主控站、时间同步/注入站和监测站等若干地面站-The ground segment.The BDSground segmentconsists ofvarious groundstations,includingmaster controlstations,time synchronization/uplink stations,and monitoringstations.——用户段北斗系统用户段包括北斗兼容其他卫星导航系统的芯片、模块、天线等基础产品，以及终端产品、应用系统与应用服务等一The user segment.The BDSusersegmentconsists ofvarious kindsofBDSbasicproducts,including chips,modules andantennae,as wellas terminals,application systemsandapplication services,whicharecompatiblewithother systems.三北斗系统的发展特色III CharacteristicsoftheBDS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 BDSdevelopment followsa modelof developingregional servicecapacities,thengradually extendingtheserviceglobally.This practicehas enrichedthedevelopmentmodelsfor navigationsatellitesystemsworldwide.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TheBDSpossesses thefollowing characteristics:First,its spacesegmentisa hybridconstellationconsistingofsatellites inthree kindsof orbits.In comparisonwithother navigationsatellite systems,theBDSoperates moresatellites inhigh orbitsto offerbetter anti-shieldingcapabilities,which isparticularly observablein termsof performanceinthelow-latitude areas.Second,theBDSprovides navigationsignals ofmultiple frequencies,and isable toimproveservice accuracyby usingcombined multi-frequency signals.Third,theBDSintegratesnavigation andcommunication capabilitiesforthefirst time,and hasfive majorfunctions-real-time navigation,rapid positioning,precise timing,location reportingand shortmessagecommunication services.四持续提升北斗系统性能IV ImprovementofBDSPerformance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 meetthe increasinguser demand,BDS technicalresearchanddevelopment intheareasofsatellites,atomic clocksandsignalswill bestrengthened,andanew generationofnavigation,positioningandtiming technologieswill beexplored toimprove serviceperformance.——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 globalservices.China willlaunch new-generation navigationsatellites,developairborne atomicclocks withenhanced performance,further improvethe performanceandlifetime ofsatellites,and buildmore stable andreliableinter-satellite links.It willbroadcastadditional navigationsignals,and enhancethe compatibilityandinteroperabilitywith othernavigationsatellitesystems,soastoprovidebetterservicesforglobalusers.——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 servicecapabilities.China willestablish agrounded testand validationbed toaccomplishthe fullcoverage oftests andvalidation forspace and ground equipment;continueto buildand improvesatellite basedandgroundbased augmentationsystems tosubstantiallyenhance BDSservice accuracyand reliability;optimize thetechnical systemof locationreportingand shortmessage communicationto expanduser volumeandservicecoverage.——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 BDTis relatedtotheCoordinated UniversalTime,andthetime biasinformation isbroadcast inthe navigationmessage.China willpush forwardtheclock biasmonitoring withothernavigationsatellitesystems,andimprovetheir compatibilityandinteroperability.It willdevelopaBDS-based worldwidelocation identificationsystem,increasetheinteroperability betweenBDS coordinateframe andthat ofothernavigationsatellitesystems,and constantlyrefine thereference frame.

三、提供可靠安全的卫星导航服务III.Reliable andSafe SatelliteNavigation 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 iscommitted toensuring thesafe andreliable operationoftheBDS bytaking multiplemeasures,and toprovidingcontinuous,stableandreliable openservicestousers freeofcharge.一保障北斗系统安全稳定运行I EnsuringSafe andReliable BDSOperations——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 themanagement mechanismon operation.Perfecting anormalized multi-partyresponse mechanismfor BDSspacesegment,groundsegmentandusersegment.Continuously enhancingthe capabilityof assuranceto managethe operationof large-scaleconstellations.——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-EstablishingaGNSS monitoring and assessmentnetwork.Constructing aninternationalGNSS MonitoringandAssessmentSystem,actively implementinginternationalcooperation,extensively exploitinginternational resources,carrying outmonitoringand。