北斗卫星导航系统英文版介绍_图文.ppt
北斗卫星导航系统建设与发展(英文版)
smooth transition during all life cycle.
10
Contents
1. Basic principles
2. System General Description
3. System Deployment
Signals (actual emission)
mainly COMPASS Phase(CP) II signals
2020
5GEO+3IGSO+27MEO （Global Service）
mainly CP III signals
17
Signal Characteristics
CP II: B1, B2, and B3 as below
8
Basic Principles
Compatibility
BeiDou will pursue solutions to realize compatibility and interoperability with other satellite navigation systems.
9
Basic Principles
B1(I)
18
CP III: B1, B2 and B3 as below
Component B1-CD B1-CP B1-A B2aD B2aP 1575.42 2.046 Carrier Frequency (MHz) Chip Rate (cps) 1.023 Data/Symbol Rate (bps/sps) 50/100 No 50/100 No 25/50 No 1191.795 10.23 AltBOC(15,10 ) Open MBOC(6,1,1/11) Open Modulation Type Service Type
北斗卫星导航系统建设与发展(英文版)
China determined to develop an independent satellite navigation system in 1980s’.
The BeiDou navigation demonstration system was completed in 2003, since then it has been used in many areas. Now the BeiDou navigation satellite system is under construction.
The technical preparation for publishing BeiDou SIS ICD (v1.0) has been finished, and the ICD as well as its update will be gradually released on the governmental website of BeiDou System.
10
Contents
1. Basic principles 2. System General Description 3. System Deployment 4. Applications 5. Compatibility and Interoperability 6. Conclusions
11
System Description
➢System Structure ➢Signal Characteristics ➢Time System ➢Coordinate System ➢Services and Performances
12
System Structure
Space Segment
北斗卫星导航系统(Beidou satellite navigation system)
北斗卫星导航系统（Beidou satellite navigation system）Beidou satellite navigation systemPublished: 2011-9-19 21:27:01 Views: 99 []: small fontsBeidou satellite navigation system is developed by Chinese regional active 3D satellite positioning and communication system (CNSS), in addition to America's global positioning system (GPS), after the Russian GLONASS third sophisticated satellite navigation system. Beidou satellite navigation system is committed to the global users to provide high quality positioning, navigation and timing service, its construction and development will follow the openness, autonomy, compatibility and gradual progress of the 4 principles.brief introductionBeidou satellite navigation system, BeiDou (COMPASS) Navigation Satellite System, is a global satellite navigation system, independent research and development, Chinese is implementing the independent operation of the.Schematic diagram of the Beidou satellite navigation systemBeidou satellite navigation system by the end of the space, the ground end and user end is composed of three parts, including 5 end space satellites in geostationary orbit and non geostationary orbit 30 satellites, the ground terminal comprises a main control station, into the station and monitoring station several ground stations, the user terminal composed by Beidou user terminal and compatible with the UnitedStates GPS, Russia GLONASS, GALILEO and other European satellite navigation system.China had been successfully launched four Beidou navigation satellite test and three Beidou navigation satellite system, will be in the network and on the basis of experiment, and gradually extended to the global satellite navigation system.targetBeidou satellite navigation system aims to build a global coverage of the Beidou satellite navigation system independent, open and compatible, built with advanced technology, stable and reliable, promote the satellite navigation industry chain formation, the formation of a sound national satellite navigation industry support, promotion and support, promote the applications of satellite navigation in the national economic and social sectors.Schematic diagram of the Beidou satellite navigation systemThere are 4 sets of satellite navigation systems in the world at present: Chinese compass, American GPS, the Russian GLONASS, the European Galileo satellite navigation system is an important infrastructure space, has brought great economic and social benefits for human beings. Chinese as a developing country, has a vast territory and sea area, attaches great importance to the construction of satellite navigation system, exploring and developing with satellite navigation and positioning system with independent intellectual property rights.Since 2000, Chinese has successfully launched 4 Beidou navigation satellite test, built Beidou navigation experiment system (first generation system). This system has the localization, in the range of China and its surrounding areas in the timing, message and GPS wide area differential function, and has been in the mapping, telecommunications, water conservancy, transportation, fishery, exploration, forest fire prevention and national security and other areas to gradually play an important role.Chinese composition is the construction of the Beidou satellite navigation system, the space segment consists of 5 satellites in geostationary orbit and non geostationary orbit 30 satellites, provides two kinds of services, namely open service and authorization service (which belongs to the second generation system). Open service is free in the service area to provide positioning, velocity and timing services, positioning accuracy of 10 meters, the timing accuracy of 50 ns, measurement accuracy of 0.2 meters per second. The authorization service is to provide positioning, more secure to authorized users speed, timing and communication service and integrity information system.Chinese plans around 2012, the Beidou system will cover the Asia Pacific region, around 2020 global coverage. Our country is carrying out the construction of the Beidou satellite navigation system, has successfully launched four Beidou navigation satellite. According to the overall planning, system construction about 2012, the system will first have to cover the Asia Pacific region of positioning, navigation andtiming and short message communication service capability; built around 2020, global coverage Beidou satellite navigation system.courseSchematic diagram of the Beidou satellite navigation systemSatellite navigation system is an important spatial information infrastructure. Chinese attaches great importance to the construction of satellite navigation system, satellite navigation system has independent intellectual property rights in the exploration and development efforts. In 2000, the first built Beidou navigation test system,China has become the United States and Russia after the world's third country with autonomous navigation satellite system. The system has been successfully applied in surveying and mapping, telecommunications, water conservancy, fishery, transportation, forest fire prevention, disaster relief and public security and other fields, has significant economic and social benefits. Especially in the 2008 Beijing Olympic Games, Wenchuan has played an important role in earthquake relief. In order to better serve the national construction and development, to meet the global application demand, our country started to implement the construction of the Beidou satellite navigation system.navigation satellite[first]In April 14, 2007, Chinese successfully launched first Beidou navigation satellite.Schematic diagram of the Beidou satellite navigation system[Second]In April 15, 2009 16, China with a "Long March three rocket from the Xichang satellite launch center, the success of the second Beidou navigation satellite into orbit. Chinese satellite navigation engineering center responsible person, the Beidou navigation satellite launch (COMPASSG2), is China Beidou satellite navigation system (COMPASS, BeiDou, Chinese name) second satellite network construction plan, the geosynchronous orbit satellite. The successful launch of the satellite has a very important significance for the construction of the Beidou satellite navigation system.Satellite navigation system is an important space infrastructure that can provide high precision positioning, velocity measurement and time service, can bring enormous social and economic benefits. China attaches great importance to the construction of satellite navigation system, has been working to explore and develop satellite navigation system with independent intellectual property rights. Beidou navigation test system has been built China, plays an important role in surveying and mapping, telecommunications, water conservancy, transportation, fishery, exploration, forest fire prevention and national security etc.. At present, is carrying out the construction of the Beidou satellite navigation system.The launch of the satellite and rocket are developed by China Aerospace Science and Technology Corporation owned Chinese Research Institute of space technology and China rocket technology research institute. This is the long march rocket flight 116th.[Third]0:12 on January 17, 2010, China's "Long March three rocket from the Xichang satellite launch center, the success of the third Beidou navigation satellite into orbit, which marks the construction of Beidou satellite navigation system project is an important step, satellite network is steadily according to plan.Schematic diagram of the Beidou satellite navigation systemAccording to the Chinese satellite navigation engineering center responsible person, is the implementation of the Beidou satellite navigation system (COMPASS, Chinese, named BeiDou) construction work, planning launched 5 satellites in geostationary orbit and non geostationary orbit 30 satellites, built Beidou satellite navigation system covering the whole world. Previously, has successfully launched two Beidou navigation satellite, the satellite into geostationary orbit satellite. In 2012, according to the construction plan, the Beidou satellite navigation system will be the first to provide coverage in the Asia Pacific region navigation, timing and short message communication service ability. Around 2020, built global coverage Beidou satellite navigation system.[Fourth]The evening of June 2, 2010 at 23:53, China's "Long March three rocket from the Xichang satellite launch center, the fourth Beidou navigation satellite into space orbit, which marks the network construction of the Beidou satellite navigation system is an important step, China satellite navigation system project management office responsible person said, at present, Chinese Beidou navigation satellite launch network has entered the intensive stage.Beidou satellite navigation system is a global satellite navigation system of autonomous development, China is implemented independently, its construction goal: to build a global coverage of the Beidou satellite navigation system independent, open and compatible, advanced technology, stable and reliable, promote the satellite navigation industry chain formation, the formation of a sound national satellite navigation industry support and promotion and security system, promote the wide application of satellite navigation in the national economic and social sectors.Working principleThe working process of the Beidou satellite navigation system is: first to the satellite I and satellite II and sends the interrogation signal from the central control system via satellite transponder to users in radio service area. One of the satellites, the user response to the interrogation signal, and also to the two satellite transmits a response signal viasatellite transmitted to the central control system. The central control system to receive and demodulate the user's signal, the corresponding data processing according to the application user and service content. The location for the central control system, measure two time delay: from the center of the control system sends out the interrogation signal by a satellite forwarded to users, the user sends positioning response signal delayed by the same satellite transmitted to the central control system; and a request signal from the central control, the same satellite arrived the user, user sends a response signal, the delay of another satellite transmitted to the central control system. Because of the central control system and two satellite locations are known, so from the above two delay amount can be calculated by the user to the first satellite distance, and users to two satellites and distance, so as to know the user in a first satellite for a sphere surface, and to two. As the intersection between satellite focus on ellipsoid. In addition to the central control system from the storage in the computer digital topographic map to search the user can know the user elevation value in a parallel and ellipsoidal earth reference ellipsoid surface. To the central control system can finally calculate the 3D coordinates of the point where the user, the coordinate encrypted by outbound signal sent to the user.Schematic diagram of the Beidou satellite navigation systemShort message communication: one can transmit up to 120 messages Chinese characters.Precision timing accuracy: up to 10 ns.Positioning accuracy: the level of accuracy of 100 meters (1 sigma), after the establishment of the calibration station is 20 meters (similar to differential state). Working frequency: 2491.75MHz.System capacity: 540000 households per hour.Construction principleThe construction and development of the Beidou satellite navigation system, in order to promote the application and development of industry as the basic goal, not only to build the system, but also to use the system, emphasis on quality, safety, efficiency, application, follow the following principles of construction:1, open. The construction of the Beidou satellite navigation system development and application will be open to the world, to provide high quality services for free users worldwide, and actively carry out exchanges and cooperation with other countries in the world widely and deeply, promoting the compatible satellite navigation systems and interoperability, promote the development of satellite navigation technology and industry.2, autonomy. Chinese self construction and operation of the Beidou satellite navigation system, Beidou satellite navigation system can provide services for independent users worldwide.3, compatibility. The International Committee on global navigation satellite systems (ICG) and ITU (ITU) under the framework of the Beidou satellite navigation system and the satellite navigation system to achieve compatibility and interoperability, so that all users can enjoy the fruits of the development of satellite navigation.4, progressive. China will actively and steadily push forward the construction and development of the Beidou satellite navigation system, and constantly improve the service quality, and realize the seamless connection of each stage.Compared with the GPS systemCoverageBeidou navigation system is China local coverage area navigation system. The coverage of about 70 degrees -140 degrees east longitude, latitude 5 degrees -55. GPS is an all-weather navigation system covering the whole world, to ensure that any place on the earth at any time can also observed 6-9 satellites (in fact, most can be observed in 11).Schematic diagram of the Beidou satellite navigation system advantagesThe number of satellites and orbital characteristicsBeidou navigation system is a set of 2 geostationary satellites in the earth's equatorial plane, satellite equatorial angular distance is about 60 degrees. GPS is a set of 24 satellites in6 orbital planes, equatorial orbit at an angle of 55 degrees, 60 degrees angle equatorial orbit plane. GPS navigation satellite orbit for quasi synchronous orbit around the earth, 11 hours and 58 minutes a week.The positioning principleBeidou navigation system is active two-way rangingtwo-dimensional navigation.The center of the ground control system solution for the user, three-dimensional positioning data. GPS is a passive pseudo code ranging 3D navigation. Is your solution independent of three-dimensional positioning data from the user equipment. The working principle of Beidou "has two aspects, one is the user location and lost radio concealment, the military is adverse, on the other hand, because the equipment must include a transmitter, so in the volume, weight, price and power consumption at a disadvantage.positioning accuracyThe 3D positioning accuracy of the Beidou navigation system about several tens of meters, the timing accuracy of about 100ns. GPS 3D positioning accuracy P code has increased from 16m to 6m, the C/A code has been increased from 25-100m to 12M, the timing accuracy of about 20ns.User capacityBeidou navigation system is the enquiry response system foractive two-way ranging, not only to ask the reception center of the ground signal control system between the user equipment and the geostationary satellite, also requires the user equipment to transmit the response signal, synchronous satellite, the channel frequency response of the user capacity of the system depends on the user to allow the blocking rate of the signal rate and asked, user. Therefore, the user equipment capacity of Beidou navigation system is limited. GPS is a one-way ranging system, ranging positioning device sends users as long as the receiving navigation satellite navigation message, so the user equipment capacity of GPS is infinite.ViabilityAs with all satellite navigation and positioning system, Beidou satellite system and control center based on the work, but the "Beidou" dependence on the central control system is obviously much larger, because the positioning solution in there and not by the user equipment to complete the. In order to compensate for the vulnerability of the system, GPS is the development of star transverse data link technology, the main event after the destruction of the GPS satellite can run independently. "Beidou" system from the principle of ruling out the possibility that once the central control system is damaged, the system will not be able to continue to work.Real time"Beidou" user applications must be sent back to the central control system, after the central control system calculates the user's three-dimensional position data and then sent back tothe user, after go back and forth a geostationary satellite, and satellite transmission, processing center control system, time delay is longer, so for high speed movement body, can increase the positioning error. In addition, Beidou satellite navigation system has its own characteristics, its communication function is not available on the GPS.Service IntroductionBeidou satellite navigation system is committed to the global users to provide high quality positioning, navigation and timing services, including open service and authorization service in two ways. Open service is provided free of charge to the global positioning, velocity and timing services, positioning accuracy of 10 meters, the measurement precision of 0.2 M / s, the timing accuracy of 10 ns. Authorized service for high precision and high reliability of satellite navigation user needs, provide location, speed, timing and communication service and integrity information system.The Beidou satellite navigation system to better serve the global service, strengthen the Beidou satellite navigation system compatible with other satellite navigation systems and interoperability, promote the comprehensive application of satellite positioning, navigation and timing services, China is willing to cooperate with other countries, the common development of the satellite navigation industry.。
北斗卫星导航系统英文版介绍 ppt课件
Serve the world Benefit the mankind
作为全球导航卫星系统合作的一员，北斗系统致力于向 全球用户提供高质量、高可靠的卫星定位导航和授时服务。为 全人类做出重要的贡献。
As one of the cooperators of global navigation satellite systems. Beidou system will be committed to providing satellite positioning. Navigation and timing services with high performance high quality and high reliability for global users, and make important contributions to human society.
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China maritime fishery
For Fishing Vessels
navigation and position（导航定位） distress signals（发出遇难信号） maritime notice（海洋预报） value attitude information（有价值的 方位信息）
作为国际全球导航卫星系统委员会(IGE)的一员，中国参与了以住的会议 和非正式论坛，与相关国家地区和国际组织的权威部门进行沟通交流，中 国愿与外国积极合作，在卫星的频率协调(frequency coordination)、卫 星间的兼容和互通(compatibility and interoperability)、国际标准 (international standard)、时间和参考协议(time and coordinate reference)、北斗系统与其它卫星导航系统间的科学研究和应用发展方面 提供服务(scientific research and applicative development between Beidou system and other satellite navigation system ) 。中国致力于推广世界范围内的卫星导航应用，并为科学发展和技术进步 方面做出应有的贡献。
北斗导航技术PPT课件
北斗卫星导航系统简介
• 应用
北斗卫星导航系统简介
• 发展历程
➢ 试验系统（北斗一代）：1983年陈芳允院士提出，1994年开始研制， 2003年完成组建
➢ 伽利略系统合作计划 ➢ 正式系统（北斗二代）：2004年-2020年
பைடு நூலகம்
北斗一代
• 主要参数
➢ 服务区：我国及周边地区 ➢ 定位精度：水平精度100米（1σ），设立标校站之后为20米（类似差
分状态）。 ➢ 定位时间：几秒钟 ➢ 授时精度：单向100ns，双向20ns ➢ 通信能力：双向短报文通信120个汉字
北斗一代
• 优点 ➢ 成本低 ➢ 定位快 ➢ 双向通信与授时 ➢ 位置报告
。 标，这个坐标经加密由出站信号发送给用户
北斗一代
• 定位原理（双星定位法）
• 中心控制系统测出两个时间延迟：即从中心控制系统发出询问信号， 经某一颗卫星转发到达用户，用户发出定位响应信号，经同一颗卫星 转发回中心控制系统的延迟；和从中心控制发出询问信号，经上述同 一卫星到达用户，用户发出响应信号，经另一颗卫星转发回中心控制 系统的延迟。由于中心控制系统和两颗卫星的位置均是已知的，因此 由上面两个延迟量可以算出用户到第一颗卫星的距 离，以及用户到两颗卫星距离之和，从而知道用户 处于一个以第一颗卫星为球心的一个球面，和以两 颗卫星为焦点的椭球面之间的交线上。另外中心控 制系统从存储在计算机内的数字化地形图查寻到用 户高程值，又可知道用户处于某一与地球基准椭球 面平行的椭球面上。即可以推算出用户位置。
1561.098MHz。
北斗二代
北斗卫星导航系统简介ppt资料
测到6-9颗卫星(实际上最多能观测到11颖)。 2、定位原理：北斗导航系统是主动式双向测距二维导航。地面中心控制系统解 算，供用户三维定位数据。GPS是被动式伪码单向测距三维导航。由用户 设备独立解算自己三维定位数据。“北斗一号”的这种工作原理带来两个 方面的问题，一是用户定位的同时失去了无线电隐蔽性，这在军事上相 当不利，另一方面由于设备必须包含发射机，因此在体积、重量上、价 格和功耗方面处于不利的地位。 3、定位精度：北斗导航系统三维定位精度约几十米，授时精度约100ns。 GPS三维定位精度P码目前己由16m提高到6m，C/A码目前己由25-100m提 高到12m，授时精度日前约20ns。
第四页，编辑于星期五：十四点 一分。
*
四大功能
1. 短报文通信：北斗系统用户终端具有双向报文通信功 能（不同于GPS的一点），用户可以一次传送40-60个汉 字的短报文信息。可以达到一次传送达120个汉字的信息。 在远洋航行中有重要的应用价值。 2. 精密授时：北斗系统具有精密授时功能，可向用户提 供20ns-100ns时间同步精度。 3. 定位精度：定位精度可达数十纳秒(ns)的同步精度， 其精度与GPS相当。 。 4. 系统容纳的最大用户数：540000户/小时。
民方应用
个人位置服务 当你进入不熟悉的地方时，你可以使用装有北斗卫星导航接收 芯片的 或车载卫星导航装置找到你要走的路线。 气象应用 气象应用的开展，可以促进我国天气分析和数值天气预报、气 候变化监测和预测，也可以提高空间天气预警业务水平，提升 我国气象防灾减灾的能力。
智能交通 卫星导航将促进传统运输方式实现升级与转型。例如，在铁路运输领 域，通过安装卫星导航终端设备，可极大缩短列车行驶间隔时间，降 低运输成本，有效提高运输效率。未来，北斗卫星导航系统将提供高 可靠、高精度的定位、测速、授时服务，促进铁路交通的现代化，实 现传统调度向智能交通管理的转型。
北斗一号英语介绍
北斗一号英语介绍**The Beidou-1: China's Global Vision in Satellite Navigation System**In the realm of satellite navigation, the Beidou-1, China's first-generation satellite navigation system, has marked a significant milestone in the country's space exploration journey. Since its inception in the late 1990s, the Beidou-1 has not only served as a critical component of China's national security but also played a pivotal role in推进中国's economic and technological growth. This article aims to delve into the English introduction of the Beidou-1, exploring its technological advancements, applications, and the broader implications it holds for China and the global community.Technologically speaking, the Beidou-1 represents a remarkable feat in China's space technology. Comprisingthree geostationary orbit satellites and one inclined geosynchronous orbit satellite, the system providescoverage over China and周边地区, enabling users to determine their positions, velocities, and timing with precision. This precision is crucial in variousapplications, ranging from military operations to civilian uses such as transportation, meteorology, and agriculture. One of the key applications of the Beidou-1 is in the field of transportation. With the increasing demand for efficient and reliable navigation systems, the Beidou-1 has been integrated into various transportation modes,including aircraft, ships, and road vehicles. The system's ability to provide accurate positioning and timing information has significantly enhanced the safety and efficiency of transportation systems, thus contributing to China's transportation modernization efforts.Moreover, the Beidou-1 has also found widespread use in meteorology. By providing precise positioning data, the system helps meteorologists to monitor and predict weather patterns, thereby enhancing the country's weather forecasting capabilities. This, in turn, supports various sectors such as agriculture, aviation, and tourism, enabling them to plan their activities based on accurate weather information.Beyond its domestic applications, the Beidou-1 also holds significant implications for the global community. AsChina's space program continues to expand, the Beidou-1 serves as a testament to the country's increasing technological prowess and spacefaring capabilities. Its integration into global navigation satellite systems such as GPS and GLONASS not only enhances the reliability and accuracy of these systems but also demonstrates China's commitment to promoting international cooperation in space exploration.In conclusion, the Beidou-1 satellite navigation system represents a pivotal milestone in China's space exploration journey. Its technological advancements, widespread applications, and global implications highlight thecountry's growing prowess in the field of satellite navigation. As China continues to invest in its space program, the Beidou-1 remains a critical component in推进中国's ambitions in space exploration and beyond.**北斗一号：中国卫星导航系统的全球视野**北斗一号，作为中国第一代卫星导航系统，在卫星导航领域标志着中国空间探索历程的重要里程碑。
北斗卫星导航系统介绍 ppt课件
3.3 星载原子钟
有卫星导航心脏之称的星载原 子钟发挥着提供时间基准的作 用
北斗三号星载原子钟，授时精度高 达10纳秒
四、北斗在行业中的应用
4.1 行业应用
沙场点兵 地震救援 渔民出海
基于北斗的集 装箱智能物流 系统
4.1 行业应用
精准农业
4.2 北斗在救灾中的应用
2008年 汶川地震 进入灾区的救援部队， 利用北斗120个字的短报文功能向指挥 部汇报送灾情。
4.3 用户终端监控
4.4 在线终端数据统计
统计近七天内所有终端的上线记录使用系统注册用户进行登录
4.5 全国省级节点网络分布地图
4.6 指挥机卫星信息状态
4.7 省级节点运行状态信息监控
4.8 终端人员管理
查看终端分配人员列 表，可选择不同属性 信息进行模糊查询， 并可执行添加、修改、 删除操作。
4.9 终端与指挥机隶属关系
选择所属单位查 看终端-指挥机 隶属关系列表， 配有导入导出模 板下载辅助功能， 可执行添加、修 改、删除操作。
4.10 终端通信分组
自定义将终端分组，便于向指定范围内成员发送报文信息，并可执行添加、修改、删除、分组操作。
4.11 北斗短报文发送
4.12 北斗短报文查询
5.1 部级主节点建设
5.1 部级主节点建设
5.2 省级分节点建设
省民政厅（局）：北斗指挥所设备1套、RDSS服务器1台。 2.4万台设备在线信息交互，不间断工作时间超过100000小时。
5.2 省级分节点建设
5.3 北斗指挥机
• 北斗指挥机G2000系列 北斗指挥型用户机，支持北斗二号RDSS信号和北斗 二号RNSS B1L1信号。北斗指挥机G2000-A: 支持 2000个民用用户。能够向全国北斗信息终端发送北 斗单播、组播和通报信息；每台指挥主机设备的通 播终端数大于2000。
创意简约风北斗卫星导航定位系统原理及应用知识科普PPT课件
/道路交通管理
北斗三号
➢ 卫星导航将有利于减缓交通阻塞，提升道路交通管 理水平。通过在车辆上安装卫星导航接收机和数据发 射机，车辆的位置信息就能在几秒钟内自动转发到中 心站。这些位置信息可用于道路交通管理。例如，指 示车辆F走air畅p通ric的e w道ith路e，xtr限a 制ser进vic入es拥挤的道路，或通告 司机前方拥堵的情况，建议走车辆较少的路线。如果 车辆超P速as行t p驶ro而jec发t m生ai交nt通en事an故ce，up则to撞1车m时on的th速度、位 置和时间信息均会被记录在上，作为判断是否违章的 依据；如果车辆被盗或被抢，卫星导航会很快发现并 跟踪其位置，使盗贼无处藏身。
➢ 从2007年开始，到2012年为止，我国在5年内共发射了16颗北斗二号卫星， 实现了对亚太区域的覆盖，并在2012年底正式对外提供服务，完成了北斗三步 走战略的第二步。同时，鉴于北斗一号短报文和位置报告功能的实用性，该项 功能在北斗二号中得到了保留。
/ Study Case
/定位原理
北斗一号
/时间系统
时间系统
➢北斗时（BDT）溯源到协调世界时UTC（NTSC），与UTC的时间偏差小 于100纳秒。BDT的起算历元时间是2006年1月1日零时零分零秒（UTC）。
➢BDT与GPS时（1980年1月6日UTC0）时和Galileo时的互操作在北斗设 计时间系统时已经考虑，BDT 与GPS时和Galileo时的时差将会被监测和发 播。
/ LOGO
美国 GPS
俄罗斯 GLONAS
S
中国北斗 BDS
欧盟 GALILEO
/ 各有特色
特点：
➢美国GPS最早投入实用，系统精度最高 ➢俄罗斯格洛纳斯号称抗干扰能力最强 ➢欧洲伽利略号称系统最精密 ➢北斗是唯一可以发短信聊天的
北斗卫星导航系统建设与发展英文版
Services and Performances
Two kinds of regional services Wide area differential service • Positioning accuracy: 1 m short message service
23
Contents
11
System Description
System Structure Signal Characteristics Time System Coordinate System Services and Performances
12
System Structure
Space Segment
CP II: B1, B2, and B3 as below
Component
Carrier Frequency Chip Rate
(MHz)
(cps)
Bandwidth (MHz)
Modulation Type
B1(I) B1(Q) B2(I) B2(Q)
B3
1561.098 1207.14 1268.52
The BeiDou navigation demonstration system was completed in 2019, since then it has been used in many areas. Now the BeiDou navigation satellite system is under construction.
1. Basic principles 2. System General Description 3. System Deployment 4. Applications 5. Compatibility and Interoperability 6. Conclusions
北斗导航技术ppt课件
北斗二代
• 定位技术-三球交汇定位（与GPS定位原理一致）
• 定位技术
北斗二代
题外：DGPS
• 分为局域差分（LADGPS)与广域差分(WADGPS) 两种
• WADGPS可覆盖整个国家，包括SBAS卫星就是利用静止轨道卫星建 立的地区性广域差分增强系统。现有的SBAS卫星包括EGONS(欧 洲）、WAAS（美国）、MSAS（日本）、GAGAN（印度）。
• 缺点
➢缺乏隐蔽性 ➢用户容量受限制
➢定位精度不高， 无测速功能
北斗二代
• 正式系统
• 北斗卫星导航系统”一词一般用来特指第二代系统。此卫星导航系统 的发展目标是对全球提供无源定位，与GPS相似。在计划中，整个系 统将由35颗卫星组成，其中5颗是静止卫星，以与使用静止轨道卫星 的北斗卫星导航试验系统兼容。
北斗系统致力于向全球用户提供高质量的定 位、导航、授时服务，并能向有更高要求的授权 用户提供进一步服务，军用与民用目的兼具。
北斗卫星导航系统简介
• 应用
北斗卫星导航系统简介
• 发展历程
➢ 试验系统（北斗一代）：1983年陈芳允院士提出，1994年开始研制， 2003年完成组建
➢ 伽利略系统合作计划 ➢ 正式系统（北斗二代）：2004年-2020年
北斗一代
• 系统组成
• 系统分为三个部分，分别为空间段、地面段、用户段： • 空间段：由3颗地球静止轨道卫星组成，两颗工作卫星定位于东经
80°和140°赤道上空，另有一颗位于东经110.5°的备份卫星，可在 某工作卫星失效时予以接替。 • 地面段：由中心控制系统和标校系统组成。中心控制系统主要用于卫 星轨道的确定、电离层校正、用户位置确定、用户短报文信息交换等。 标校系统可提供距离观测量和校正参数。 • 用户段：用户的终端。
北斗卫星导航系统建设与发展英文版-47页PPT精品文档
Carrier Frequency Chip Rate
(MHz)
(cps)
Data/Symbol Rate (bps/sps)
B1-CD B1-CP
B1-A
1575.42
1.023 2.046
50/100 No
50/100 No
B2aD B2aP B2bD B2bP B3
1191.795
10.23 10.23
5
Basic Principles
Openness Independency Compatibility Gradualness
6
Basic Principles
Openness
BeiDou will provide high quality open services free of charge from direct users, and worldwide use of BeiDou is encouraged.
22
Services and Performances
Two kinds of regional services Wide area differential service • Positioning accuracy: 1 m short message service
23
Contents
8
Basic Principles
Compatibility
BeiDou will pursue solutions to realize compatibility and interoperability with other satellite navigation systems.
北斗卫星导航系统建设与发展英文版精品文档
Carrier Frequency Chip Rate
(MHz)
(cps)
Data/Symbol Rate (bps/sps)
B1-CD B1-CP
B1-A
1575.42
1.023 2.046
50/100 No
50/100 No
B2aD B2aP B2bD B2bP B3
1191.795
10.23 10.23
The governmental website of BeiDou Satellite Navigation System was launched on Jan. 15, 2019.
“” or “”.
The English version will be online soon.
11
System Description
System Structure Signal Characteristics Time System Coordinate System Services and Performances
12
System Structure
Space Segment
2019
5GEO+5IGSO+4MEO mainly COMPASS Phase(CP) II （Regional Service） signals
北斗卫星导航系统COMPASS
北斗卫星导航系统（一）概述北斗卫星导航系统﹝BeiDou（COMPASS）Navigation Satellite System﹞是中国正在实施的自主发展、独立运行的全球卫星导航系统。
系统建设目标是：建成独立自主、开放兼容、技术先进、稳定可靠的覆盖全球的北斗卫星导航系统，促进卫星导航产业链形成，形成完善的国家卫星导航应用产业支撑、推广和保障体系，推动卫星导航在国民经济社会各行业的广泛应用。
北斗卫星导航系统由空间段、地面段和用户段三部分组成，空间段包括5颗静止轨道卫星和30颗非静止轨道卫星，地面段包括主控站、注入站和监测站等若干个地面站，用户段包括北斗用户终端以及与其他卫星导航系统兼容的终端。
（二）发展历程卫星导航系统是重要的空间信息基础设施。
中国高度重视卫星导航系统的建设，一直在努力探索和发展拥有自主知识产权的卫星导航系统。
2000年，首先建成北斗导航试验系统，使我国成为继美、俄之后的世界上第三个拥有自主卫星导航系统的国家。
该系统已成功应用于测绘、电信、水利、渔业、交通运输、森林防火、减灾救灾和公共安全等诸多领域，产生显著的经济效益和社会效益。
特别是在2008年北京奥运会、汶川抗震救灾中发挥了重要作用。
为更好地服务于国家建设与发展，满足全球应用需求，我国启动实施了北斗卫星导航系统建设。
（三）建设原则北斗卫星导航系统的建设与发展，以应用推广和产业发展为根本目标，不仅要建成系统，更要用好系统，强调质量、安全、应用、效益，遵循以下建设原则：1、开放性。
北斗卫星导航系统的建设、发展和应用将对全世界开放，为全球用户提供高质量的免费服务，积极与世界各国开展广泛而深入的交流与合作，促进各卫星导航系统间的兼容与互操作，推动卫星导航技术与产业的发展。
2、自主性。
中国将自主建设和运行北斗卫星导航系统，北斗卫星导航系统可独立为全球用户提供服务。
3、兼容性。
在全球卫星导航系统国际委员会（ICG）和国际电联（ITU）框架下，使北斗卫星导航系统与世界各卫星导航系统实现兼容与互操作，使所有用户都能享受到卫星导航发展的成果。