北斗卫星导航系统建设与发展(英文版)
北斗定位-毕业论文外文文献翻译
外文文献原稿和译文原稿Beidou positioningPrefaceNavigation satellite systems can provide all time, all weather and high accuracy positioning, navigation and timing services to users on the earth surface or in the near-earth space. It is an important space inf rastructure, which extends people’s range of activities and promotes social development. Satellite navigation is bringing up revolutionary changes to the world politics, economy, military, technology and culture.With a long history and a splendid culture, China is one of the important cradles of early human civilization. In ancient times, Chinese people used the Big Dipper (Beidou) for identifying directions, and invented the world’s first navigation device, the ancient compass (Sinan), which was a great contribution to the development of world civilization. In modern society, the Chinese-built BeiDou（COMPASS） system will become another contribution to the mankind.In early 1980s, China began to actively study the navigation satellite systems in line with C hina’s conditions. In 2000, BeiDou Navigation Demonstration System is basically established, which made China the third nation in possession of an independent navigation satellite system following the United States and Russia. At present, China is steadily accelerating the construction of the BeiDou Navigation Satellite System, and has already successfully launched 10 satellites so far.The BeiDou system will meet the demands of China’s national security, economic development, technological advances and social progress, safeguard national interests and enhance the comprehensive national strength. The BeiDou system will commit to providing stable, reliable and quality satellite navigation services for global users. Along with other GNSS providers, the BeiDou system will jointly promote the development of satellitenavigation industry, make contributions to human civilization and social development, serve the world and benefit the mankind.I. System DescriptionThe BeiDou system is comprised of three major components: space constellation, ground control segment and user terminals. The space constellation consists of five GEO satellites and 30 non-GEO satellites. The GEO satellites are positioned at 58.75°E, 80°E, 110.5°E, 140°E and 160°E respectively. The non-GEO satellites include 27 MEO satellites and three IGSO satellites. The MEO satellites are operating in an orbit with an altitudeof 21,500 km and an inclination of 55°, which are evenly distributed in three orbital planes. The IGSO satellites are operating in an orbit with an altitude of 36,000 km and an inclination of 55°, which are evenly distributed in three inclined geo-synchronous orbital planes. The subsatellite track for the three IGSO satellites are coincided while the longitude of the intersection point is at 118°E, with a phase difference of 120°.Ground control segment consists of several Master Control Stations (MCS), Upload Stations (US) and a network of globally distributed Monitor Stations (MS). The main tasks of MCS are to collect observing data from each MS, to process data, to generate satellite navigation messages, wide area differential data and integrity information, to perform mission planning and scheduling, and to conduct system operation and control. The main tasks of Upload Stations include completing the upload of satellite navigation messages, wide area differential data and integrity information, controlling and managing the payload. The tasks of Monitor Stations include continuous tracking and monitoring of navigation satellites, receiving navigation signals, sending observational data to the Master Control Station for the satellites orbit determination and time synchronization.The user terminals include various BeiDou user terminals, and terminals compatible with other navigation satellite systems, to meet different application requirements from different fields and industries.The time reference for the BeiDou Navigation Satellite System uses BeiDou Time (BDT). BDT’s length of second is a SI second. BDT was zero at 0:00:00 on Janu ary 1, 2006 Coordinated Universal Time (UTC). BDT is a continuous system, traceable to the UTC time maintained by the National Time Service Center (NTSC) of ChineseAcademy ofSciences, which is referred to as UTC (NTSC). The leap seconds with UTC information is broadcasted in the navigation messages. The difference between BDT and UTC maintains within 100ns.The coordinate framework of BeiDou system adopts China Geodetic Coordinate System 2000 (CGCS2000).Upon the full system completion, the BeiDou Navigation Satellite System can provide positioning, navigation and timing services to worldwide users. It can also provide wide area differential services with the accuracy of 1m and short messages services with the capacity of 120 Chinese characters each time.·Main functions: positioning, velocity measurement, one-way and two-way timing, short messages·Service area: global·Positioning accuracy: better than 10m·Velocity accuracy: better than 0.2m/s·Timing accuracy: 20nsII. System DevelopmentThe BeiDou system has followed the development concept of starting with regional services first and expanding to global services later. A three-step development strategy has been taken, with specifics as follows:Phase I: BeiDou Navigation Satellite Demonstration System. In 1994, Chinastarted the construction of BeiDou Navigation Satellite Demonstration System. In 2000, two BeiDou navigation experiment satellites were launched, and the BeiDou Navigation Satellite Demonstration System was basically established. In 2003, the third BeiDou navigation experiment satellite was launched, further enhancing the performance of the BeiDou Navigation Satellite Demonstration System.BeiDou Navigation Satellite Demonstration System consists of three major components: space constellation, ground control segment and user terminals. The space constellation includes three geostationary orbit (GEO) satellites, positioned at longitude of 80 degrees East, 110.5 degrees East and 140 degrees East respectively above the equator. Ground control segment consists of the ground control center and a number of calibrationstations. The ground control center is to complete satellite orbit determination, ionospheric correction, user location determination and user short message information exchange and processing. The calibration ground control stations are mainly to provide the distance measurement and correction parameters to the ground control center.The user terminals include the hand-held type, vehicle type, command type and other types of terminals, capable of position service application, location coordinates information receiving and other functions.The main functions and performance specifications of the BeiDou Navigation Satellite Demonstration System are as follows:·Main functions: positioning, one-way and two-way timing, short message communications;·Service Area: China and the surrounding areas;·Positioning Accuracy: better than 20 meters;·Timing Accuracy: 100 ns one-way, two-way 20 ns;·Short message communications: 120 Chinese characters per time.Phase II: BeiDou Navigation Satellite (regional) System. In 2004, Chinastarted construction of BeiDou Navigation Satellite System. In 2007, the first satellite, a round medium earth orbit satellite (COMPASS-M1) was launched. By 2012, the BeiDou system will consist of 14 satellites, including five GEO satellites, five IGSO satellites (two in-orbit spares), and four MEO satellites.The functions and performance parameters of BeiDou Navigation Satellite (regional) System are as follows:·Main functions: positioning, velocity measurement, one-way and two-way timing, short message communications;·Service Area: China and part of Asia- Pacific region ;·Positioning Accuracy: better than 10 meters;·Velocity Accuracy: better than 0.2 m/s;·Timing Accuracy: 50 ns;·Short message communications: 120 Chinese characters per message.Phase III: BeiDou Navigation Satellite System will completely be established by 2020.III. System ApplicationsSince it was officially brought into service in 2003, the BeiDou Navigation Satellite Demonstration System has been widely used in transportation, marine fisheries, hydrological monitoring, weather forecasting, forest fire prevention, timing for communication systems, power distribution, disaster mitigation, national security, and many other fields, which has been resulting in significant social and economic benefits. Particularly, the system has played an important role in the South China frozen disaster, earthquake relief in Wenchuan, SichuanProvince and Yushu, Qinghai Province, the Beijing Olympic Games, and the Shanghai World Expo.—In the field of transportation, built on the Beidou Navigation Satellite Demonstration System, applications such as Xinjiang Satellite Navigation Monitoring System of Public Transport, the Highway Infrastructure Safety Monitoring System, and the Port Scheduling High-precision Real-time Position Monitoring System, have promoted the BeiDou system and achieved a good demonstration effect.—In marine fisheries, built on the BeiDou Navigation Satellite Demonstration System, the marine fisheries integrated information service platform has provided vessel position monitoring, emergency rescue, information distribution, fishing boats in and out of port management and other services to the fishery administration departments.—The hydrological monitoring system, based on the BeiDou Navigation Satellite Demonstration System, has realized the real-time transmission of hydrological forecast information in mountainous regions, which has improved the accuracy o f the disaster forecasting and has helped the planning and scheduling programs for the flood and drought control.—In the field of weather forecasting, a series of BeiDou terminal equipment have been developed for weather forecast, and various practical and feasible system solutions have been worked out to address the automatic data transmission issues for the China Meteorological Administration and a number of local weather centers and stations.—In the field of forest fire prevention, the BeiDou Navigation Satellite Demonstration System has been successfully used in forest fire prevention system. Its positioning and short message communication services have achieved good results.—In the field of time synchronization for communication systems, the successful implementation of BeiDou two-way timing demonstration program has achieved breakthroughs in some key technical areas such as long distant fiber technology, and an integrated satellite-based timing system has been developed.—In the field of power distribution, built on the BeiDou Navigation Satellite Demonstration System, the successful implementation of power system time synchronization demonstration program has created basis for the high precision applications such as the electric accident analysis, the electricity early warning and protection systems.—In the field of disaster mitigation, the navigation, positioning, short message communications and position reporting capabilities of the BeiDou Navigation Satellite Demonstration System have provided services for the nationwide real-time disaster relief commanding and dispatching, emergency communications, rapid reporting and sharing of disaster information, which has significantly improved the rapid response of the disaster emergency relief and decision-making capability.Upon the full completion, the BeiDou Navigation Satellite System will provide more high-performance positioning, navigation, timing and short-message communication services for civil aviation, shipping, railways, finance, postal and other industries.IV. International Exchange and CooperationThe international exchange and cooperation for the BeiDou Navigation Satellite System will be carried out in an active and pragmatic way, which is in line withChina’s foreign policies, focusing on China's basic tasks and strategic objectives for the construction of navigation satellite systems, using the domestic and international markets and resources in a coordinated way. The international exchange and cooperation will be proceeded in a phased, focus-centered, non-discriminatory and selective approach in accordance with the overall development plan of China's navigation satellite system. It will be built upon the basis of equality, mutual benefit, mutual complementarity, peaceful utilization and mutual development and the generally accepted principles of the international laws.The BeiDou Navigation Satellite System adheres to the open and friendly attitude, and has already carried out extensive exchanges and consultation with the countries that have navigation satellite systems, to promote navigation satellite system compatibility and interoperability globally. Through the exchange and cooperation with countries that do not have a navigation satellite system, we also support their use of the existing resources globally and share the benefits of the satellite navigation development.China's international exchange and cooperation in the field of satellite navigation started in the 1990s. In nearly 20 years, various forms of activities have been carried out with extensive results.In 1994, under the framework of International Telecommunication Union(ITU),China started the BeiDou Navigation Satellite System frequency coordination activities. Satellite network information was submitted in accordance with the BeiDou system construction plan and progress. International frequency coordination has been carried out in a phased, step by step, focus-centered approach. China has actively participated bilateral frequency coordination activities with Europe, the UnitedStates and Russia, and has actively taken part in the World Radiocommunication Conference and the meetings of ITU study groups and working groups.China, as an important member of the International Committee on Global Navigation Satellite Systems (ICG), has participated in every ICG General Assembly Meeting and the ICG Providers Forum. In 2007, China became one of the four core providers designated by the organization. Focusing on compatibility and interoperability, China has carried out the extensive exchange and cooperation with the other navigation satellite systems in the world. The Technical Working Group (TWG) on compatibility and interoperability between BeiDou and Galileo was established. Until now, seven TWG meetings have been held.China actively participates, organizes and hosts international academic exchanges on satellite navigation, which include the American Institute of Navigation (ION) Conferences, the International Symposium on GPS/GNSS (ISGNSS), Munich Satellite Navigation Summit and other international conferences and forums. The China academic conferenceon satellite navigation is held annually, together with many other forums and seminars.China encourages and supports domestic research institutions, industrial enterprises, universities and social organizations, under the guidance of the government policy, to carry out international exchanges, coordination and cooperation activities with other countries and international organizations in the fields of the compatibility and interoperability, satellite navigation standards, coordinates frame, time reference, application development and scientific research. China has been actively engaged in international activities in terms of monitoring and assessment of open service for GNSS to promote the BeiDou Navigation Satellite System better serving the global users, and to promote the development of satellite navigation technology.ConclusionThe rapid development of the BeiDou Navigation Satellite System is attributedto China's reform and opening-up policy as well as the sustainable development of economy. As always, China will continue to promote the Global Navigation Satellite System construction and industrial development, to encourage the use of new satellite navigation technologies to provide new services, meeting the growing diversified needs of the people. By actively propelling international exchanges and cooperation, China will realize the compatibility and interoperability between the BeiDou Navigation Satellite System and other navigation satellite systems in the world. China will provide global customers with high performance and highly reliable positioning, navigation and timing services.The Launch Record of BeiDouNavigation Satellites·October 31, 2000, launch of 1st BeiDou navigation experiment satellite.·December 21, 2000, launch of 2nd BeiDou navigation experiment satellite.·May 25, 2003, launch of the 3rd BeiDou navigation experiment satellite.·February 3, 2007, launch of the 4th BeiDou navigation experiment satellite.·April 14, 2007, launch of the 1st BeiDou navigation satellite.·April 15, 2009, launch of the 2nd Beidou navigation satellite.·January 17, 2010, launch of the 3rd BeiDou navigation satellite.·June 2, 2010, launch of the 4th BeiDou navigation satellite.·August 1, 2010, launch of the 5th BeiDou navigation satellite.·November 1, 2010, launch of the 6th BeiDou navigation satellite. ·December 18, 2010, launch of the 7th BeiDou navigation satellite. ·April 10, 2011, launch of the 8th BeiDou navigation satellite. ·July 27, 2011, launch of the 9th BeiDou navigation satellite. ·December 2, 2011, launch of the 10th BeiDou navigation satellite.译文北斗定位前言卫星导航系统可以提供所有的时间，所有天气情况下用户在地球表面或近地空间的高精度定位、导航和授时服务。
北斗导航卫星英中文版介绍
Beidou (Compass) Navigation Satellite System With the long history and its splendid culture. China is one of the important creatures of early human civilization. Chinese people have used the big dipper for identifying direction ever since ancient times. They invented the world's first navigation device 'Compass', which was a great contribution for the development of the world. And become a bridge of friendship between China and foreign countries. The ancient Compass has become the glory of our history. While Beidou system will become a new contribution of China to mankind.Beidou (Compass) Navigation Satellite System is a global navigation satellite system,which is being independently developed and operated by China. It will provide all weather-position velocity and timing services with high accuracy and reliability with users anywhere anytime. It has advantages of quick-positioning, location-reporting and information exchange.The development of Beidou system can be divided into three phases.Phase 1. In the early 1980s China began to study Beidou Navigation Demonstration System based on dual satellite active positioning. The construction of the Demonstration System started in 1994. The system began to provide services in 2000. Which made China the third nation in position of an independent navigation satellite system following the U.S and Russia. The Demonstration System consists of three GE satellites and corresponding ground systems. The cost efficient system was quickly put into use. It has been providing positioning, short message telecommunication and timing services for users in China and nearby areas.Phase 2. To provide better services for national economic development and to meet in creasing demand for satellite navigation. China started to build Beidou Navigation SatelliteSystem besed on passive positioning in 2004. Around 2012, they system will cover the Asia-Pacific region with more than 10 satellites. Currently several satellites have been successfully launched, and the project is advancing on schedule.Phase 3. Around 2020, Beidou System will be completed and provide global coverage with 35 satellites, offering state-of-the-art services. Worldwide users will enjoy two kinds of high quality, including Open and Authorized services. The Open services will be free of direct charge with an accuracy of 10m for positioning 0.2m/s for velocity and 20ns for timing. The Authorized service will have higher accuracy and better reliability and will be available to authorized users.From the snow cover of Plateau to the Gobi Desert, from the Northern border to the Southern territorial seas. Since 2000, Beidou Navigation Demonstration System has been widely used in many fields. Such as Mapping, Telecommunications, Water conservancy, Fishery, Transportation, Forest fire prevention, Disaster relief and Public safety. Especially in the Beijing Olympic Games, the Frozen, Disaster Wenchuan Earthquake relief and Shanghai World Expo. The Demonstration System has played an important role and produce significant economic and social benefits.Beidou System has been widely used in the field of China maritime fishery. It can provide services for fishery management devolvement. Such as Vessel position monitoring, Emergency rescue, Policy issue and Vessel in and out management. It can also provide services for fishing vessels. Such as Navigation and position, Distress signals, Maritime notice and Value attitude information, providing vessel-vessel and vessel-shore message telecommunications.Beidou System has also played an important role in disaster rescue. In 2008, Wenchuan suffered a catastrophic earthquake, in which the ground cables and communication facilities were damaged seriously. Under the emergency of interruption of regular communications and impossible roads, Beidou System provided an important assurance for command of relief teams and notice of disaster's situation. And it was an advantage for positioning and short message telecommunications.As an important member of IGE, China has participated in all previous assemblies and private forums. Widely communicated with authorities of relevant countries. China will always actively cooperate with foreign countries. And promote cooperation in Frequency coordination, Compatibility and interoperability, International standard, Time and coordinate reference, Scientific research and Applicative development between Beidou System and other satellite navigation systems. China will promote worldwide application of satellite navigation and make contributions to scientific development, and technological progress of this field.Our own ancestors used the big dipper for identifying direction. Today we use Beidou system for global positioning. 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.Serve the world. Benefit the mankind. This is Beidou Navigation Satellite System.北斗导航系统在漫长的充满文化底蕴的历史长河中，中国是早期人类文明发展的重要一环。
介绍北斗卫星导航系统的研发应用英语作文
介绍北斗卫星导航系统的研发应用英语作文全文共10篇示例，供读者参考篇1Hi everyone, do you know about the Beidou Satellite Navigation System? It's super cool and I'm going to tell you all about it!The Beidou Satellite Navigation System is a super smart system that helps us know where we are and how to get where we want to go. It was developed by China and has been in the works for a long time. The Beidou system has a bunch of satellites up in space that send signals to our devices to show us where we are on a map. Isn't that amazing?The Beidou system is not just for helping us find our way, it also has a lot of other uses too. It can be used for things like tracking ships and airplanes, monitoring weather conditions, and even helping with disaster relief efforts. The Beidou system is like a superhero up in space, always ready to help us when we need it.I think the Beidou Satellite Navigation System is super cool and I can't wait to see what else it can do in the future. It's likehaving a super smart friend who always knows where to go and how to get there. I hope you learned something cool about the Beidou system too!篇2North Star Satellite Navigation System is super cool! It was developed by super smart scientists and engineers to help us find our way around the world. Isn't that awesome?First of all, let me tell you what the North Star Satellite Navigation System is. It's a system of satellites that orbit the Earth and send signals to our phones, cars, and other devices. These signals help us figure out where we are and how to get where we want to go. It's like having a super smart friend who knows all the roads and shortcuts!The North Star Satellite Navigation System is super important because it helps us in so many ways. For example, when we go on a road trip with our family, we can use it to find the best route and avoid getting lost. We can also use it to find our friends' houses, restaurants, and other cool places. It's like having a magical map that shows us everything!But wait, there's more! The North Star Satellite Navigation System is also used in airplanes, ships, and even self-driving cars.It helps them navigate safely and efficiently, making travel much easier for everyone. It's so cool to think that something up in space can help us down here on Earth.In conclusion, the North Star Satellite Navigation System is super awesome and super helpful. It's like having a superpower that helps us find our way in the world. So next time you use your phone to get directions, remember to thank the super smart scientists and engineers who made it all possible. Thank you, North Star Satellite Navigation System!篇3Hey guys, do you know about the Beidou Satellite Navigation System? It's a really cool system that helps us find our way around using satellite technology. Let me tell you more about it!The Beidou Satellite Navigation System is a space-based satellite navigation system developed by China. It was named after the Chinese term for the Big Dipper constellation, which is also known as the Northern Star. Just like how we use the stars to navigate, the Beidou system uses a network of satellites to provide accurate positioning, navigation, and timing services to users all around the world.One of the coolest things about the Beidou system is that it can be used for a variety of purposes. For example, it can be used for transportation, such as guiding ships at sea or helping airplanes navigate safely. It can also be used for disaster relief efforts, as it can help rescue teams locate people in need of help. And it can even be used for everyday activities like hiking or driving, to make sure we don't get lost!The Beidou system is constantly being improved and upgraded to make sure it continues to provide accurate and reliable services. With more satellites being launched into space and new technologies being developed, the Beidou system is becoming even more powerful and useful for people all over the world.So next time you're traveling or just exploring your neighborhood, remember to thank the Beidou Satellite Navigation System for helping you find your way! It's like having your own personal guide in the sky. Cool, right?篇4Hey guys, have you ever heard of the BeiDou Satellite Navigation System? It's super cool and I'm gonna tell you all about it!satellite navigation system developed by China. It provides global positioning, navigation, timing, and short messaging services to users around the world. The system consists of a network of satellites that orbit the Earth and communicate with ground stations to provide accurate positioning information.One of the main applications of the BeiDou Satellite Navigation System is in transportation. It helps drivers navigate to their destination using GPS technology, making it easier to find your way around unfamiliar places. This is especially useful for long road trips or when driving in a busy city.Another cool application of the BeiDou system is in agriculture. Farmers can use the system to track their crops, monitor soil conditions, and optimize irrigation and fertilization. This helps increase crop yields and reduce waste, making farming more efficient and sustainable.The BeiDou system is also used in disaster management. During natural disasters such as earthquakes or floods, the system can provide real-time positioning information to emergency responders, helping them locate and rescue people in need. This can save lives and reduce the impact of disasters on communities.useful technology that makes our lives easier and safer. Next time you're lost or need help, just remember that BeiDou is there to guide you!篇5Hello everyone! Today I'm going to talk about the Beidou Satellite Navigation System. Have you heard of it before? It's a really cool system that helps us find our way around using satellites in space.The Beidou Satellite Navigation System was developed in China and it's similar to the GPS system that you might have on your phone. It uses a network of satellites to determine your location and give you directions to where you want to go. Isn't that amazing?One of the great things about the Beidou system is that it's not just for regular people like us to use. It's also used in all kinds of different industries, like transportation, agriculture, and even in emergency situations. For example, it can help ships navigate the seas, assist farmers in planting crops more efficiently, and provide accurate location information for search and rescue operations.The Beidou system has been in development for many years and it's constantly being improved to make it even better. With more satellites being launched into space, the system is becoming more accurate and reliable than ever before. This means that we can rely on it to help us find our way no matter where we are.So next time you're using a map on your phone or getting directions from your car's GPS, remember that it's all thanks to amazing technology like the Beidou Satellite Navigation System. It's truly a wonder of modern science that makes our lives easier and more convenient. Let's give a big round of applause to all the scientists and engineers who have worked hard to make it possible! Thank you for listening!篇6Hello everyone, today I want to introduce to you the Beidou Satellite Navigation System. Have you ever heard of it before? It's a really cool technology that helps us find our way around using satellites in space.The Beidou Satellite Navigation System was developed by China and it is similar to the GPS system in the United States. It has been in development for many years and now it is used notonly for navigation purposes, but also for things like weather forecasting, agriculture, and even helping with disaster relief efforts.One of the coolest things about the Beidou system is that it is made up of a network of satellites that orbit the Earth. These satellites send signals to devices like our smartphones or GPS devices, which then use those signals to determine our location. This is how we can use our phones to get directions, find nearby restaurants, or even track our exercise routes.The Beidou system has also been used in many other applications. For example, farmers can use it to optimize the use of water and fertilizers in their fields, which can help increase crop yields. It is also used in transportation to track vehicles and improve logistics efficiency. In emergency situations, like natural disasters, the Beidou system can be used to coordinate rescue efforts and deliver aid to people in need.Overall, the Beidou Satellite Navigation System is a really amazing technology that has many important applications. It is changing the way we navigate, communicate, and even help others in times of need. I think it's really cool that we have this kind of technology available to us and I can't wait to see what other ways it will be used in the future. Thank you for listening!篇7Hey guys, do you know about the Beidou Satellite Navigation System? It's a really cool technology that helps us figure out where we are on the Earth! Today, I'm going to introduce to you all about the research and applications of the Beidou Satellite Navigation System.The Beidou Satellite Navigation System is a Chinese satellite navigation system that was developed by China Aerospace Science and Technology Corporation. It is made up of a network of satellites that orbit around the Earth and send out signals to our devices on the ground. These signals help us determine our exact location, speed, and direction.One of the main uses of the Beidou Satellite Navigation System is in transportation. It helps pilots to navigate their airplanes, ships to find their way at sea, and even helps us find our way when driving in our cars. The Beidou System is also used in agriculture to help farmers plant crops more efficiently and monitor their fields. It can even help us with emergency services, like finding people who are lost in the wilderness.The Beidou Satellite Navigation System is constantly being improved and expanded. China is planning to launch moresatellites to improve the accuracy and coverage of the system. They are also working on integrating the Beidou System with other satellite navigation systems, like GPS, for even better performance.In conclusion, the Beidou Satellite Navigation System is a super cool technology that helps us navigate our way around the world. It's constantly being improved and expanded, and who knows what other amazing things it will help us do in the future!篇8Hey guys! Do you know about the Beidou Satellite Navigation System? It's super cool and I'm going to tell you all about it!The Beidou Satellite Navigation System is a satellite navigation system developed by China. It consists of a network of satellites that provide positioning, navigation, and timing services to users all over the world. The system is similar to GPS, which many of you might be familiar with, but Beidou is more accurate and reliable.The Beidou system has many different applications. One of the most important is in transportation. It helps people navigate while driving, flying, or even sailing. This way, people can reachtheir destinations more easily and safely. It also helps with things like tracking the movement of cars, ships, and airplanes.Another cool thing about the Beidou system is that it can be used for things like agriculture. Farmers can use it to track their crops, monitor weather conditions, and even control irrigation systems. This helps them increase their crop yields and make their farms more efficient.The Beidou system is also used in disaster relief. When there's a natural disaster like an earthquake or a flood, the system can help rescue teams locate people in need of help. This can save lives and ensure that aid gets to the right places quickly.In conclusion, the Beidou Satellite Navigation System is an amazing technology that has many important applications. It's making our lives easier, safer, and more efficient. So next time you're out and about, remember to thank Beidou for helping you get where you need to go!篇9Hello everyone, today I'm going to talk about something super cool - the BeiDou Satellite Navigation System!The BeiDou Satellite Navigation System is like a super smart GPS that helps us find our way around. It was developed by China and has been in the works for many years. The system uses a network of satellites to provide accurate positioning, navigation, and timing services to users all over the world.One of the main reasons why the BeiDou Satellite Navigation System is so awesome is because it can provide more accurate and reliable navigation services compared to other navigation systems. This is super important for things like driving, flying, and even for activities like hiking and camping. With BeiDou, we can always find our way home!Another cool thing about the BeiDou Satellite Navigation System is that it has been used in a variety of applications. For example, it's used in transportation to help vehicles navigate and avoid traffic jams. It's also used in agriculture to help farmers optimize their planting and harvesting schedules. And it's even used in search and rescue operations to locate people in distress.In addition to all these applications, the BeiDou Satellite Navigation System is also being used in scientific research and exploration. Scientists use the system to track the movement of glaciers, study earthquakes, and even monitor the migrationpatterns of animals. It's incredible how this technology is being used to help us understand and protect our planet.Overall, the BeiDou Satellite Navigation System is agame-changer in the world of navigation and positioning. It's reliable, accurate, and versatile, making it an essential tool for so many different industries and activities. I can't wait to see how this amazing technology continues to evolve and improve in the future!That's all for my introduction to the BeiDou Satellite Navigation System. I hope you enjoyed learning about this incredible technology. Thanks for listening!篇10Hello everyone! Today I want to talk to you about the BeiDou Satellite Navigation System. Have you ever heard of it before? It's a really cool system that helps us find our way around using satellites in the sky!First of all, let me tell you a little bit about how the BeiDou system works. There are a bunch of satellites up in space that send signals down to Earth. Our phones or cars can pick up these signals and use them to figure out where we are and how to getto where we want to go. It's like having a map that knows exactly where you are all the time!The BeiDou system was developed in China and has been used for all kinds of things. For example, it helps farmers figure out where to plant their crops and how to take care of them. It also helps drivers navigate busy roads and find the fastest way to get to their destination. And in emergencies, it can even be used to send out distress signals and get help quickly.But the BeiDou system isn't just for practical things – it's also used in all kinds of fun ways. For example, people use it to play games where they have to find hidden treasures using their GPS. And some athletes use it to track their workouts and see how far they've run or cycled.In conclusion, the BeiDou Satellite Navigation System is a really amazing invention that helps us in so many different ways. Whether we're trying to get to a new place or just having fun exploring, BeiDou is always there to guide us. So next time you're out and about, remember to thank the satellites up in space for helping you find your way!。
北斗卫星导航系统建设与发展
编者按：2020年11月23日，第十一届中国卫星导航年会在成都召开。
在年会开幕式上，中国卫星导航系统管理办公室副主任杨军作了《北斗卫星导图1 北斗三号全球卫星导航系统星座组网图优于0.2m/s，授时精度优于20ns；亚太地区定位精度优于5m，测速精度优于0.1m/s，授时精度优于10ns。
交通运输方面，北斗系统广泛应用于重点运输过程监控、公路基础设施安全监控、港口高精度实时定位调度监控等领域，使综合交通管理效率和运输安全水平显著提升。
截至2020年10月底，有近700万辆道路营运车辆已经安装使用北斗系统，占运营车辆的96%；3.14万辆邮政快递车辆安装使用北斗系统，占比88%；约1400艘公务船舶安装使用北斗系统，占比75%；约300架通用飞行器安装使用北斗系统，占比11%。
特别是在运输航空器上成功实现了北斗首次应用。
此外，北斗在中欧班列运输、京张高铁建设运营、浩吉和沪昆等铁路测试监测等方面也得到大量应用，为铁路运输高质量发展赋能赋智。
农业领域，基于北斗的农机自动驾驶系统推广应用近4.5万台套，节约50%的用工成本；基于北斗的农机作业监管平台和物联网平台为近40万余台套农机设备提供服务，极大提高了作业管理效率。
林业领域，北斗定位与短报文通信功能广泛应用于森林防火、天然林保护、森林自然调查、病虫害防治等。
渔业领域，为渔业管理部门和渔船提供船位监控、紧急救援、信息发布、渔船出入港管理等服务。
减灾救灾方面，基于北斗的导航、定位、短报文通信功能，提供实时救灾指挥调度、应急通信、灾情信息快速上报与共享等服务，显著提高了灾害应急救援的快速反应能力和决策能力。
已建成部、省、市 （县）三级平台，实现六级业务应用，推广北斗终端超过4.5万台。
湖南、江苏、贵州、广西、四川等地利用北斗/GNSS高精度技术建立地质灾害监测预警系统，在2020年抗击南方洪灾期间，多次成功预报山体滑坡等灾害事件发生，保障了人民生命财产安全。
北斗卫星导航系统资料
20
坐标系统
?北斗系统采用中国 2000大地坐标系统 （CGS2000）。
CGCS 2000椭球上的正常重力值与GRS 80 ,WGS 84 椭球上的正 常重力值的差值分别约为- 143. 54 ×10 - 8 m/ s2 和0. 02×10 8 m/ s2 。同一点在CGCS 2000 与GRS 80 和WGS 84 下经度相同, 纬度的最大差值分别为8. 26 ×10 - 11″(相当于2. 5 ×10 - 6 mm) 和3. 6 ×10 - 6″(相当于0. 11 mm) 。这里主要是指椭球参数的 不同而引起的同一点经纬度的差异,给定点位在某一框架和某 一历元下的空间直角坐标,投影到CGCS 2000 椭球和WGS 84 椭 球上所得的纬度的最大差异相当于0. 11 mm。
信号（实际发射）
2012年
5GEO+5IGSO+4MEO （区域服务）
主要是北斗系统第二阶段信号
2020年
5GEO+3IGSO+27MEO （全球服务）
主要是北斗系统第三阶段信号
17
信号特征
?北斗系统第二阶段信号
信号
中心频点 (MHz)
码速率 (cps)
B1(I) B1(Q) B2(I) B2(Q)
12
系统组成
?空间段
5颗GEO卫星和30颗Non-GEO 卫星
星座
GEO 卫星
MEO 卫星
13
系统组成
? 地面段
地面段由主控站、上行注入站和监测站组成。
14
系统组成
介绍北斗卫星导航系统的研发应用英语作文
The Development and Applications of China's Beidou Satellite Navigation System The Beidou Satellite Navigation System, also known as BDS, is a crucial component of China's independent global navigation satellite system. Since its inception in the 1990s, BDS has undergone several stages of development, evolving from a regional system to a fully operational global navigation satellite system. This remarkable feat in technological advancement has not only enhanced China's strategic position in the global space race but has also opened up a wide range of applications in various sectors. The initial stages of BDS saw the launch of experimental satellites, followed by the establishment of a regional navigation satellite system covering Asia-Pacific. This regional system provided positioning, navigation, and timing services to the region, supporting various applications such as transportation, meteorology, and agriculture. With the successful launch of more satellites, BDS has gradually expanded its coverage, encompassing global regions, making it a truly global navigationsatellite system.One of the most significant applications of BDS is in the transportation sector. It has greatly improved the efficiency and safety of road, rail, and maritime transportation by providing precise positioning and timing information. Vehicles equipped with BDS receivers can obtain real-time traffic information, optimal routes, and accurate arrival times, greatly reducing travel time and congestion. Additionally, BDS has been integrated into intelligent transportation systems, enabling features like automatic driving, collision avoidance, and emergency braking.In the field of meteorology, BDS plays a crucial rolein weather forecasting and climate monitoring. By providing precise positioning data, it enables meteorologists to track and predict the movement of weather systems more accurately. This information is crucial for planning and responding to extreme weather events, such as hurricanes, tornadoes, and floods.Agriculture is another sector that has benefited significantly from BDS. Farmers can now use precision farming techniques, such as variable-rate fertilization andprecision irrigation, based on precise positioning data provided by BDS. This not only improves crop yield and quality but also reduces the environmental impact of farming activities.Beyond these sectors, BDS has found applications in various other fields, including search and rescue operations, disaster management, and even leisureactivities like hiking and fishing. The system's accuracy and reliability have made it a trusted partner in many critical operations, ensuring the safety and efficiency of personnel and operations.In conclusion, the development and applications of China's Beidou Satellite Navigation System have marked a significant milestone in technological advancement. Its transition from a regional to a global system has not only boosted China's position in the global space race but has also opened up a wide range of applications in various sectors, enhancing efficiency, safety, and sustainability. As BDS continues to evolve and improve, its impact on society and the economy will become even more profound.**中国北斗卫星导航系统的研发与应用**北斗卫星导航系统，简称北斗系统，是中国自主研发的全球导航卫星系统的重要组成部分。
北斗卫星导航系统建设与发展
一、发展规划1．发展目标北斗卫星导航系统致力于为全球用户提供连续、稳定、可靠的定位、导航、授时服务；满足国家安全和经济社会发展对定位、导航、授时的需求，促进国家信息化建设和经济发展方式转变，提升经济和社会效益；与世界其他卫星导航系统共同合作，服务全球、造福人类。
2．基本原则开放：面向全球用户免费提供开放服务。
自主：独立自主发展和运行北斗系统。
兼容：致力于实现与其他卫星导航系统的兼容与互操作，使用户获得更好的服务。
渐进：依据国家的技术和经济发展实际，循序渐进地建设北斗系统。
3．发展步骤按照“三步走”的发展路线，“先区域、后全球，先有源、后无源”的发展思路分步实施，形成突出区域、面向全球、富有特色的北斗系统发展道路。
第一步：1994～2000年，形成区域有源服务能力第二步：2004～2012年，形成区域无源服务能力；第三步：2013～2020年，形成全球无源服务能力。
4．系统组成北斗系统由空间段、地面控制段、用户段组成，空间段包括5颗静止轨道（GEO）卫星、3颗倾斜同步轨道（IGSO）卫星和27颗中圆轨道（MEO）卫星；地面控制段包括主控站、注入站、监测站等30余个地面站；用户段包括北斗终端、与其他导航系统兼容的终端。
北斗系统提供授权、公开、广域差分和短报文四种服务，定位精度优于10m，授时精度优于20ns，测速精度每秒0.2m。
5．基本政策北斗系统为用户免费提供开放服务。
持续进行系统维护和完善，不断提升服务性能，为用户提供更高质量的服务。
按计划发布公开服务规范，发挥政府和市场的作用，推动北斗/GNSS应用的创新、普及与国际化，打造国家战略性新兴产业的基础。
秉承发展、合作、共赢的理念，实现北斗与其他GNSS系统的兼容共用，充分发挥系统效能，提升用户效益。
二、最新进展1．系统建设（1）保持系统稳定运行北斗系统自2012年12月27日正式提供区域服务以来，系统连续稳定运行，服务性能指标稳中有升。
通过覆盖亚太地区的服务信号监测评估表明，系统服务性能满足指标要求，部分地区服务性能优于10m。
北斗卫星导航系统的发展及应用
北斗卫星导航系统的发展及应用北斗卫星导航系统（Beidou Navigation Satellite System，简称北斗系统）是中国自主研发的全球卫星导航系统。
它起源于上世纪90年代初，经过二十多年的发展，目前已经在全球范围内开始正式提供服务。
本文将从北斗系统的发展历程和技术特点，以及其在军事、民用等领域的应用方面进行分析。
北斗系统的技术特点在于其高度的精度和可靠性。
北斗系统采用了双系统双频多星座的结构，能够提供10米级的实时定位精度和毫米级的高精度定位服务。
同时，北斗系统还具有强大的抗干扰能力和高稳定性，能够在恶劣的环境下保持导航服务的连续性和可靠性。
此外，北斗系统还具备信息服务和应急通信等能力，可以为用户提供更加全面的导航服务。
北斗系统在军事领域有着广泛的应用。
在军事装备中，北斗系统可以为导航定位、目标感知、武器制导等关键环节提供支持，提高作战的精确性和效能。
同时，北斗系统还可以为军事指挥控制、情报监测、电子对抗等领域提供信息和保障，增强军事力量的指挥和战斗力。
北斗系统在民用领域的应用也越来越广泛。
在交通运输领域，北斗系统可以为车辆导航、智能交通管理、车联网等提供支持，提高运输效率和安全性。
在航空航天领域，北斗系统可以为飞行导航、飞行管控、飞行监测等提供服务，提高空中运输的安全和效率。
在海洋渔业领域，北斗系统可以实现渔船定位追踪、渔业资源调度、渔民安全保障等功能，提高渔业的生产力和可持续发展。
此外，北斗系统还可以为气象预报、资源勘探、船舶救援等领域提供支持和服务。
北斗系统的广泛应用将为我国经济社会的发展作出重要贡献。
北斗卫星导航系统资料
26
COMPASS-G2发射
2009年4月15日，北斗卫 星导航系统的首颗GEO卫星 （COMPASS-G2 ）在西昌卫 星发射中心由长征三号丙运载 火箭成功发射，验证了GEO 导航卫星相关技术。
27
新的GEO卫星发射
2010年1月17日，北斗卫 星导航系统的第三颗组网卫星 在西昌卫星发射中心由长征三 号丙运载火箭成功发射，该卫 星也是系统的第二颗GEO卫星 。
4
发展计划
目前，我国正在实施北斗卫星导航系统建设。根据系统 建设总体规划，2012年左右，系统将首先具备覆盖亚太 地区的定位、导航和授时以及短报文通信服务能力； 2020年左右，建成覆盖全球的北斗卫星导航系统。
5
服务
北斗卫星导航系统致力于向全球用户提供高质量的定 位、导航和授时服务，包括开放服务和授权服务两种方 式。开放服务是向全球免费提供定位、测速和授时服务 ，定位精度10米，测速精度0.2米/秒，授时精度10纳秒 。授权服务是为有高精度、高可靠卫星导航需求的用户 ，提供定位、测速、授时和通信服务以及系统完好性信 息。 为使北斗卫星导航系统更好地为全球服务，加强北斗 卫星导航系统与其它卫星导航系统之间的兼容与互操作 ，促进卫星定位、导航、授时服务的全面应用，中国愿 意与其它国家合作，共同发展卫星导航事业。
作为全球系统，北斗卫星导航系统首先在2012年左 右覆盖亚太地区，并将在2020年前覆盖全球。
北斗系统第二阶段
2012年左右
北斗系统第三阶段
2020年前
25
COMPASS-M1发射
2007年4月，北斗卫星导航系统的首颗MEO 并完成了大量技术试验。
（COMPASS-M1）卫星成功发射，确保了ITU频率资料
B1-CP B1-A B2aD B2aP B2bD B2bP 1191.795
2016 中国北斗卫星导航系统 白皮书中英对照
中国北斗卫星导航系统（中英对照白皮书2016）中国北斗卫星导航系统China’s BeiDou Navigation Satellite System中华人民共和国国务院新闻办公室The State Council Information Office of the People’s Republic of China2016年6月June 2016目录Contents前言Preface一、发展目标与原则I. Goals and Principles 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 and Safe 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前言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 BeiDou Navigation Satellite System (hereinafter referred to as the BDS) has been independently constructed and operated by China with an eye to the needs of the country’s national security and economic and social development. As a space infrastructure of national significance, the BDS provides all-time, all-weather and high-accuracy positioning, navigation and 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。
GPSGALILEOBDSGLONASS四大卫星定位系统的论述
GPS、GAL I LEO、BDS、GLONA S S四大卫星定位系统得论述一、基本介绍>G P S数量：由24颗卫星组成。
轨道:髙度约20 2 0 0公里,分布在6条交点互隔6 0度得轨道而上。
精度：约为1 0米。
用途：军民两用。
进展：1 9 9 3年全部建成，正在实验第二代卫星系统，计划发射2 0颗。
>GLONASS数量：2 4颗卫星组成：精度：10米左右；用途：军民两用：进展:目前已有17颗卫星在轨运行，计划2 008年全部部署到位。
>GALILEO数量：30颗中高度圆轨道卫星组成，2 7颗为工作卫星,3颗为候补：轨道：高度为2 4 1 26公里，位于3个倾角为56度得轨道平而内；精度：最高精度小于1米；用途:主要为民用；进展：2 0 05年12月28日首颗实验卫星已成功发射，预计20 08年前可开通泄位服务.>BDS数量：3颗卫星组成，2颗为工作卫星，1颗为备用卫星：用途:军民两用；进展：前两颗分别于2 0 0 0年与2003年发射成功。
二、系统组成❖空间部分>GPS : GPS得空间部分就是由24颗卫星组成（2 1颗工作卫星;3颗备用卫星），它位于距地表2 0 200km得上空，均匀分布在6个轨道面上（每个轨逍面4颗），轨道倾角为55°。
卫星得分布使得在全球任何地方、任何时间都可观测到4颗以上得卫星，并能在卫星中预存导航信息，GPS得卫星因为大气摩擦等问题;随着时间得推移，导航精度会逐渐降低>GLONASS:GLONASS系统采用中髙轨逍得24颗卫星星座，有2 1颗工作星与3颗备份星，均匀分布在3个圆形轨道平而上，每轨道面有8颗，轨道高度H = 1 900 0km, 运行周期T=llh 1 5min.倾角i=64、8 ° .>GALILEO：如下图所示，3 0颗中轨道卫星（MEO ）组成Gal i leo得空间卫星星座。
卫星均匀地分布在高度约为2 3616km得3个轨道面上，每个轨道上有10颗，苴中包括一颗备用卫星，轨道倾角为56° ,卫星绕地球一周约14h22min,这样得布设可以满足全球无缝隙导航立位.卫星得设汁寿命为20年,每颗卫星都将搭载导航载荷与一台搜救转发器.卫星发射采用一箭多星得发射方式，每次发射可以把5颗或6颗卫星同时送入轨道。
介绍北斗卫星导航系统的英语作文
介绍北斗卫星导航系统的英语作文English Answer：The BeiDou Navigation Satellite System (BDS) is a Chinese satellite navigation system that provides positioning, navigation, and timing (PNT) services to users in the Asia-Pacific region and beyond. It is the fourth global navigation satellite system (GNSS), after the United States' Global Positioning System (GPS), Russia's GLONASS, and the European Union's Galileo.The BDS consists of three generations of satellites: BeiDou-1, BeiDou-2, and BeiDou-3. BeiDou-1 was a regional system that provided positioning and timing services to users in China and the surrounding region. BeiDou-2 was an expanded system that provided more accurate positioning and timing services, as well as additional navigation services. BeiDou-3 is the current generation of the system, and it provides even more accurate and reliable positioning, navigation, and timing services than the previousgenerations.The BDS is used by a wide range of users, including individuals, businesses, and government agencies. It is used for a variety of applications, including navigation, surveying, mapping, timing, and scientific research. The BDS is also used in critical infrastructure, such as power grids, telecommunications networks, and transportation systems.The BDS is an important part of China's national strategy. It is a key component of China's military modernization, and it is also used for civilian applications such as economic development and social progress. The BDS is a major investment for China, and it is expected to play a significant role in the country's future.中文回答：北斗卫星导航系统（BDS）是中国研制的卫星导航系统，为亚太及其他地区用户提供定位、导航、授时（PNT）服务。
北斗卫星导航系统建设与发展
6.法治化、标准化、知识产权中国全方位构建卫星导航法治体系，《中华人民共和国卫星导航条例》即将出台，进一步规范卫星导航活动。
发布《北斗卫星导航标准体系（2.0版）》，已制定北斗专项标准153项，国家标准立项52项，发布32项。
我国卫星导航专利申请总数持续提升，2022年我国申请并已经公开7000多件卫星导航发明专利，为实现产业自主创新和高质量发展提供了重要保证。
7.基础产品认证建立实施北斗基础产品认证制度，成立认证技术委员会，构建检测认证公共服务网络平台，发布北斗基础产品认证目录等，为构建完善北斗产业高质量发展体系提供有力支撑。
三、系统国际合作交流中国深化国际合作机制，共拓国际合作渠道，打造国际合作平台，建立国际合作窗口，持续扩大北斗系统国际“朋友圈”，不断提升卫星导航全球应用水平。
1.参与多边合作深度参与卫星导航国际事务。
参加联合国框架下系列活动，参与议题研究，研提合作建议，发起合作倡议，共商共促世界卫星导航事业发展。
2022年10月，中国代表团参加第十六届全球卫星导航系统国际委员会（英文简称“ICG”）大会，在ICG框架下处理卫星导航国际事务，参与卫星导航国际规则制定，推动卫星导航国际秩序朝着更加公正合理的方向发展。
2.推进双边合作签署中俄卫星导航领域合作路线图等纲领性文件，持续在两系统兼容互操作、增强系统与建站、监测评估、联合应用等领域开展深度合作。
2021年10月和2022年9月，双方在北京和莫斯科以视频方式成功召开中俄项委会第八、第九次会议，签署互相建设跟踪站项目合同及两系统时间互操作合作协议等合作成果。
目前，双方正在积极筹备中俄卫星导航合作分委会首次会议，深化落实合作路线图明确的工作内容，加速推进北斗和格洛纳斯系统合作。
中美持续开展北斗与GPS的兼容与互操作沟通协调，星基增强系统及民用服务领域的合作，促进了两系统的建设发展，共同服务世界各国人民。
中欧持续推进北斗与Galileo的互操作协调。
北斗卫星导航系统建设与发展英文版
2
Contents
1. Basic principles 2. System General Description 3. System Deployment 4. Applications 5. Compatibility and Interoperability 6. Conclusion
3
Contents
Control Station, Upload Stations and Monitor Stations.
14
System Structure
User Segment
The user segment consists of BeiDou user terminals and interoperable terminals with other GNSS.
1.Basic principles 2.System General Description 3.System Deployment 4.Applications 5. Compatibility and Interoperability 6.Conclusion
24
Deployment Step
1st Step—Demonstration System
COMPASS Phase I (CP I) After 3 GEO satellites being launched since 2000, the
北斗卫星导航系统英文版介绍
Phases ge telecommunication,timing services（ 提供定位，短报文通讯，授时服务）
Phases Two
start in 2004 passive positioning（无源定位） cover the Asia-Pacific region with more than 10 satellites around 2012（2012年前 后，10多颗卫星覆盖亚太地区）
Beidou Navigation Satellite System
小组成员：章林嘉，陈锐，刘欢
Ancient Times
dipper
Compass
Today
global navigation satellite system（全球导航卫星系统） independently developed and operated by China（中国 自主研发） quick-positioning,location-reporting,informationexchange（快速定位，定位报告，信息共享）
Systems Application
Systems Application
Transportation
Forest fire prevention Fishery Mapping
Public safety
Telecommunications
Water conservancy
Disaster relief
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.
北斗卫星导航系统英文版ppt演示
Next, we'll have much more money to develop new Beidou positioning system products, like this one, it can help us know more about what's going on on the road we want to go
Hi,everybody!
Members：Jeason 2011102763 Frank 2011102758 Paul 2011102767
How To Do A Project
Beidou
Global Positioning System
How To Do A Project
By now,Beidou Global Positioning System has covered the Asian-Pacific region. And by the year 2020, it can cover all the world by 35 satellites
How To Do A Project
Of course, car manufacturers can be the largest official partners. So we'll cooperate with the car manufacturers for the futher study and development.
How To Do A Project
And this one, the navigator is in the mirror.
Turn on the switch and it can be seen, when you do not use it, turn off and you will see just a mirror there. It will be more convenient and looks fashion.
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
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
6
Basic Principles
Openness
BeiDou will provide high quality open
services free of charge from direct users, and
worldwide use of BeiDou is encouraged.
China will widely and thoroughly communicate with other countries on satellite navigation issues to facilitate the development of GNSS technologies and the industry.
Munich Satellite Navigation Summit 2010
BeiDou (COMPASS) Navigation Satellite System Development
China Satellite Navigation Office
Mar. 9th-11th, 2010, Munich 1
1.Basic principles
2.System General Description
3.System Deployment
4.Applications
5. Compatibility and Interoperability
6.Conclusion
24
Deployment Step
1st Step—Demonstration System
4. Applications
5. Compatibility and Interoperability
6. Conclusions
11
System Description
System Structure
Signal Characteristics
Time System
Coordinate System Services and Performances
2
Contents
1. Basic principles 2. System General Description 3. System Deployment 4. Applications 5. Compatibility and Interoperability 6. Conclusion
3
Contents
The governmental website of BeiDou Satellite Navigation System was launched on Jan. 15, 2010. “” or “”. The English version will be online soon.
Gradualness
The construction of BeiDou system follows a stepby-step pattern based on technical and economic evolution in China.
BeiDou will provide long-term continuous services
7
Basic Principles
Independency
China will develop and operate BeiDou system independently, and BeiDou can independently provide services for global users and particularly provide high quality services in Asia-Pacific region .
14
System Structure
User Segment
The user segment consists of BeiDou user terminals and interoperable terminals with other GNSS.
User terminals of BeiDou system
BOC（14，2）
Authorized
B2bD
B2bP B3 B3-AD
50/100
No
10.23 1268.52 2.5575
500bps 50/100
QPSK(10) BOC(15,2.5)
Authorized Authorized
B3-AP
No
19
Time System
BeiDou time is named as BDT, traced to UTC, and synchronized with UTC within 100ns. The epoch time of BDT is UTC 00d 2006. Interoperability of BDT with GPS/Galileo time was considered in the design of BeiDou time system. The offset between BDT and GPST/ GST will be measured and
broadcast.
20
Coordinate System
BeiDou uses China Geodetic System 2000 (CGS2000)
Coinciding with ITRF at a few cm level, and for most
applications the difference between CGS2000 and
16
Signal Characteristics
Frequencies B1: 1559.052~1591.788MHz B2: 1166.22~1217.37MHz B3: 1250.618~1286.423MHz
Till the year Constellation
2012 5GEO+5IGSO+4MEO （Regional Service）
ITRF can be ignored.
21
Services and Performances
Two kinds of global services Open Service：free and open to users
• Positioning Accuracy: 10 m
• Timing Accuracy: 20 ns • Velocity Accuracy: 0.2 m/s Authorized Service: ensure high reliable use even in complex situation.
22
Services and Performances
Two kinds of regional services Wide area differential service • Positioning accuracy: 1 m short message service
23
Contents
1. Basic principles
2. System General Description
3. System Deployment
4. Applications
5. Compatibility and Interoperability
6. Conclusions
4
China determined to develop an independent satellite navigation system in 1980s’. The BeiDou navigation demonstration system was