BeiDou Navigation Satellite System (BDS)

 

GPS / China says BeiDou navigation satellite system is completely function now

  

 Live: China issues The White Paper on China's BeiDou Navigation Satellite System in the New Era 

 

 China's State Council Information Office releases The White Paper on China's BeiDou Navigation Satellite System in the New Era and invites Ran Chengqi, director general of the China Satellite Navigation Office and spokesperson of BeiDou Navigation Satellite System, as well as a spokesperson of the State Council Information Office to introduce the white paper. #OfficialRelease 

 

China releases white paper on BDS, outlines development in new era

 File photo of a model of the Beidou Satellite Navigation System.Photo:Xinhua

 

 
China issued a white paper on the country's BeiDou Navigation Satellite System (BDS) on Friday.

"China's BeiDou Navigation Satellite System in the New Era," the white paper said that BDS has been built into a world-class navigation system. It laid out how China plans to refine the system by improving its operation management, promoting sustainable development of BDS-based applications, and upgrading its governance in the coming years.

The white paper noted that BDS is dedicated to the world, and China will step up international cooperation for better compatibility and interoperability between BDS and other navigation satellite systems.

China is committed to "building a comprehensive spatiotemporal system that is more extensive, more integrated and more intelligent on the next generation of BDS," said the document released by the State Council Information Office.

It pointed out that China is ready to share its achievements in developing BDS, and it will work with all other countries to promote the development of navigation satellite systems and make an even greater contribution to building a global community of shared future and a better world. 

 

All BDS-3 satellites working well, contributing to top-class navigation system with unique advantages: white paper

 

The China-developed BeiDou Navigation Satellite System (BDS) has become a top-class system with cutting-edge technologies and powerful functions, according to a white paper released Friday. China is ready to share its achievements in developing the BDS and provide services to all other countries, it said.

Titled "China's BeiDou Navigation Satellite System in the New Era," the white paper published by the State Council Information Office introduced how China plans to further refine the system by improving its operation management, developing BDS-based applications, and upgrading its governance in the coming years.

The 30 in-orbit satellites of the third-generation series of the BeiDou system, or BDS-3, which officially joined commissioning in July 2020, are in good operating condition, Ran Chengqi, spokesperson for the system, said at the press conference on Friday.

The millions of components of the satellites, in more than 300 categories, are all domestically produced with excellent performances, Ran said.

Data showed that the global positioning accuracy of BDS-3 is within 5 meters, with the performance in the Asia-Pacific region even better. In general, the service performance of BDS-3 is better than the designed index, the spokesperson said.

The system offers six special services, namely international search and rescue, global short message communication, regional short message communication, satellite-based augmentation, ground-based augmentation, and precision single-point positioning.

It is the world's first navigation satellite system to provide a global short message communication service, the white paper noted.

"The 100 percent independent development and operation of BDS core components has laid a solid foundation for its wide use," it said.

Chinese experts said that compared with GPS and GLONASS, the BDS has its own advantages in navigation, positioning accuracy, timing, speed measurement, and short message transmissions.

Song Zhongping, a space expert and TV commentator, told the Global Times on Friday that the BDS offers the global short message communication service, which is unique in the world.

BDS has achieved global coverage with world-class accuracy. China will continue to improve the reliability, accuracy and safety of the BDS by deploying more satellites next year, Song said.

BDS is also dedicated to the world, Ran noted at the conference, noting that China will step up international cooperation for better compatibility and interoperability between BDS and other navigation satellite systems.

It has signed signal interoperability statements with GPS and GLONASS, and is discussing cooperation with the Galileo system. Under the framework of the United Nations, China promoted the realization of multi-system compatibility and sharing, so as to jointly provide more high-quality and diversified, safe and reliable services for global users.

BDS has established cooperation mechanisms with organizations and countries in Asia, Africa and Latin America, with more than 50 documents signed since 2016.

The white paper pointed out that China is ready to share its achievements in developing BDS, and it will work with all other countries to promote the development of navigation satellite systems and make an even greater contribution to building a global community with a shared future.

BDS provides many services for the Belt and Road Initiative and friendly countries, including transportation in the civilian field, urban surveys, urban planning, aircraft navigation and so on, Song said. "Whatever GPS can do, BDS can do it as well."

According to Song, another way of cooperation is setting up dual-mode navigation systems. For example, on a certain chip or a certain system, there can be both GPS navigation and BDS. "This switching mode makes the navigation more secure and reliable."

China will further upgrade BDS technologies, functions and services. The goal is to create a comprehensive spatiotemporal system that is more extensive, integrated and intelligent, and that provides flexible, smart, precise and secure navigation, positioning and timing services.

In building a more powerful BDS, China will create its own smart and distinctive system for operation, maintenance and management.

China began to develop its own navigation satellite system in 1994. BDS-1 entered service and began providing positioning services in China at the end of 2000. At this point, China became the third country in the world with a navigation satellite system. BDS-2 was completed in 2012, providing passive positioning services to the Asia-Pacific region.

In less than three years, 18 rockets sent 30 satellites into orbit, a pace unmatched by any other country. In 2020, BDS-3 was formally commissioned to provide satellite navigation services worldwide. 

 

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 Tech Breakdown

Hoaw to use BeiDou navigation system on your phone

 

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 Beidou Grows into World-class Navigation System in Terms of Accuracy: Chief Designer

  

 

 

 

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How to use BeiDou navigation system on your phone

China has just announced the completion and launch of its BeiDou-3 Navigation Satellite System. But, how can we use it?

CGTN recently posted a video showing the differences between China's BeiDou system and other global navigation satellite systems.

Read more: How is China's BDS different from other global navigation networks?

And we received some questions, about how to actually use BeiDou for navigation. This video explains how the system works on your phone.

Before we get started, let's clear up a common misconception. A lot of people think if you want to use the BeiDou system, you need to download some sort of "BeiDou apps."

The truth is, you don't need to download any new app for using the system. If you find an app titled "BeiDou" in an app store, it's not official. Regular navigation apps, delivery apps or car-hailing apps are all able to use the positioning service of the BeiDou system.

Civil equipment like our phones, cannot choose which navigation system to use. It will automatically pick the system that has best signal at that time.

So maybe you're using the BeiDou system right now.

But not every smartphone supports BeiDou. Currently, most of the Android phones can use the BeiDou system. But if you are an iPhone user, you are not able to use it because chips carried by the Apple product line do not support the system. To check, you can take a look at the tech specs of your phone.

GPS testing apps can show the number of satellites in your area and their signal strength. /Screenshot via GPS Test

Another way to find out whether your phone supports BeiDou is through GPS testing apps. Your phone can use BeiDou's services if the app can detect BeiDou's satellites.

There are also people asking whether BeiDou can be used outside China. You can do so just like we can use GPS services in China.

The difference is that BeiDou provides better accuracy in China and the Asia-Pacific region, at five meters, because of its unique layout. The accuracy in other areas is about 10 meters.

Cameraman: Yang Yang Video editor: Guo Meiping Cover image: Jia Jieqiong

How is China's BDS different from other global navigation networks?

https://youtu.be/NXdFg1PRKnQ

China has completed its BeiDou Navigation Satellite System, or BDS, becoming the fourth country in the world with a global navigation network, the other three being GPS of the U.S., GLONASS of Russia and Galileo of Europe.

As the name suggests, the global navigation satellite system provides navigation and location services on a 24-hour basis. From what we know so far, building a sound satellite system costs a bundle. Besides, the other systems are already well-established. So, what makes China's BDS stand out among its competitors?

Firstly, the other systems have 24 satellites in medium earth orbit (MEO). In addition to the 24 satellites, the BDS constellation also has three satellites in geostationary earth orbit (GEO) and three in inclined geosynchronous orbit (IGSO). What's special about the extra six satellites is that they have a relatively fixed range of activity.

This layout can enhance BDS' accuracy in China and the Asia-Pacific region to five meters, in comparison with a 10-meter accuracy in other areas.

Secondly, BDS has a trump card – the short message service. It is a function that allows users to have a two-way communication.

In areas not covered by cellular or communication signals, BDS can make the short message service available in uninhabited areas, such as deserts, forests, and mountainous or polar regions.

With this service, users in distress can inform the rescue team about their location and condition.

As the most populated country in the world, it's important for China to have its own global navigation satellite system to meet the needs of the country's socio-economic development.

In fact, the BDS is also good business. According to the White Paper on the Development of China's Satellite Navigation and Location Services Industry (2020), the country's satellite industry has maintained a 20-percent annual growth since 2012. BDS contributes about 80 percent of it.

The system has also generated tens of billions of dollars, countless high-paying jobs, and stimulated economic growth via big contracts in commercial industries.

And with improvements in functions, it will have much more to offer in the future.

Scriptwriter: Pan Zhaoyi Producer: Guo Meiping Cameraman: Fu Gaoliang Video editor: Zhao Yuxiang Cover image: Yin Yating

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China's largest carrier rocket Long March-5 makes new flight; BDS-3 satellite system (GPS) to complete before June 2020, Space Station operational in 2022

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VideoFromSpace 838K subscribers A Chinese Long March 5 Y3 rocket launched from Wenchang Satellite Launch Cente in south China on Dec. 27, 2019. It was carrying the Shijian-20 communications satellite. --Full Story: https://www.space.com/china-long-marc... Credit: China Central Television - CCTV

The Long March 5 is an essential booster for China's space ambitions. The heavy-lift booster will be the one to launch China's space station modules as well as a  Mars lander in 2020 and the Chang'e 5 moon sample-return mission.

China is also expected to use a version of the Long March 5, called the Long March 5B, to launch  a new crewed spacecraf — the successor to its current Shenzhou crew capsule.

The rocket stands 184 feet (56 meters) tall and weighs nearly 2 million lbs. (867,000 kilograms) at liftoff. It is capable of carrying payloads of up to 55,000 lbs. (25,000 kilograms) into low Earth orbit. It can haul up 31,000 lbs. (14,000 kg) to a higher geostationary transfer orbit.
https://www.space.com/china-long-march-5-rocket-2019-launch-success.html

China launches its largest carrier rocket Long March-5 Y3

https://youtu.be/Lc-RfXjERqg

The Long March-5 rocket, China's largest carrier rocket, was successfully launched from Wenchang Space Launch Center in south China's Hainan Province on Friday night.

The rocket lifted off at 8:45 p.m. Beijing time, carrying the Shijian-20 technological experiment satellite weighing over eight tonnes, the heaviest and most advanced communications satellite in the country.

About 2,220 seconds later, the satellite was sent into its planned orbit and the launch mission was declared a success.

Long March-5 Y3 launches Shijian-20

https://youtu.be/M_Vu60EavR8

China's largest carrier rocket Long March-5 makes new flight

China launched the third Long March-5, the largest carrier rocket of the country, from Wenchang Space Launch Center in south China's Hainan Province on Friday evening.

The rocket, coded as Long March-5 Y3, blasted off from the coastal launch center at 8:45 p.m. (Beijing time), carrying the Shijian-20 technological experiment satellite weighing over eight tonnes, the heaviest and most advanced communications satellite of the country.

About 2,220 seconds later, the satellite was sent into its planned orbit.

Wu Yanhua, deputy director of the China National Space Administration (CNSA), declared the launch a success.

The success of the flight lays the foundation for a series of future space projects for the country including exploring Mars, returning moon samples and constructing its own space station, Wu said.

The Shijian-20 satellite will be used to test the key technologies of the DFH-5 platform, China's new-generation large satellite platform, and offer communication and broadcasting service, Wu said.

The Long March-5 is a large, two-stage rocket, capable of carrying a payload of 25 tonnes, equivalent to the weight of 16 cars, to low Earth orbit, 14 tonnes to geostationary transfer orbit, eight tonnes to Earth-Moon transfer orbit, or five tonnes to Earth-Mars transfer orbit, over twice the capacity of the current main Long March series rockets. Combined with an upper stage, the rocket is capable of sending probes to explore Jupiter and other planets in the solar system, according to the China Aerospace Science and Technology Corporation (CASC).

The Long March-5 made its maiden flight on Nov. 3, 2016 from Wenchang. However, the second large rocket, Long March-5 Y2, suffered a failure, as a malfunction happened less than six minutes after its liftoff on July 2, 2017.

The research team has found that the failure was caused by a problem in the engine of the first core stage of the rocket. "We have made improvements to the design, materials and technologies of the engine," said Li Dong, chief designer of the Long March-5 rocket from the China Academy of Launch Vehicle Technology (CALT) under the CASC.

Compared with the Long March-5 Y2, the new rocket has more than 200 technological improvements, said Yang Hujun, deputy chief designer of the rocket.

The modified engine has undergone more than 10 ground tests lasting over 3,000 seconds in total.

"Over the past two years, the research team has solved the problem of the engine and improved the reliability of the rocket," said Wang Jue, chief commander of the research team.

The carrying capacity of the Long March-5 rocket equals that of other mainstream large-scale rockets in the global industry, greatly improving China's ability to launch spacecraft and laying the foundation for developing new-generation carrier rockets and heavy-lift launch vehicles, said Wang Xiaojun, head of the CALT.

The rocket is about 57 meters long, equivalent to the height of a 20-story building, with a 5-meter diameter core stage and four 3.35-meter diameter boosters. The Long March-5 is much larger than China's previous carrier rockets. It has a takeoff weight of about 870 tonnes and a thrust of over 1,000 tonnes.

The four boosters, developed by the Shanghai Academy of Spaceflight Technology under the CASC, shoulder over 90 percent of the takeoff thrust.

The rocket uses environmentally friendly fuel, including kerosene, liquid hydrogen and liquid oxygen, rather than highly toxic propellants.

It is equipped with eight liquid oxygen/kerosene rocket engines in four strap-on boosters, two liquid hydrogen/liquid oxygen engines in the first stage and two relatively small liquid hydrogen/liquid oxygen engines in the second stage.

The weight of the rocket itself only accounts for about 10 percent of the liftoff weight, and the other 90 percent is the weight of the propellants.

The research team has made efforts to decrease the weight of the rocket in its design. For instance, the thickness of the rocket shell in some parts is only a few millimeters, according to Li Linsheng, a structural strength analysis designer of the rocket.

The temperature of liquid hydrogen is minus 253 degrees centigrade, and the temperature of liquid oxygen is minus 173 degrees centigrade. The maximum temperature of the fuel during combustion in the rocket engine is more than 3,300 degrees centigrade.

China built the Wenchang Space Launch Center, the country's fourth space launch center, for the Long March-5 and other new-generation carrier rockets. The center is located on the coast of the tropical island province of Hainan, which avoids possible damage caused by the falling rocket remnants.

In the center is the country's largest and most advanced launch pad that is 70 meters tall, equivalent to the height of a 24-story building, and covers an area of 600 square meters, the same size as half a basketball court.

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BeiDou Navigation Satellite System serves the world

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How Smart is China's answer to GPS?

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China recently launched another part of the Beidou Satellite System and we wanted to take a look at some of the ways China will use this system. We look at some of the important aspects of this project and how it will benefit Chinese people and everyone around the globe.

China will finish the construction of the BeiDou-3 Navigation Satellite System (BDS-3), with another two geostationary orbit satellites to be launched before June 2020, said BDS Spokesperson Ran Chengqi on Friday.

Friday marks the one-year anniversary of China's BDS-3 system providing global service.

Ran said at a press conference of the State Council Information Office that with the BDS as the core, a more ubiquitous, integrated and intelligent navigation and timing system with comprehensive national positioning is scheduled to be established by 2035.

China sent 10 BDS satellites into space in 2019. The deployment of the core BDS-3 constellation system has been completed with all of the BDS-3 system's medium earth orbit satellites being networked.

With the system's upgraded intelligent operation and maintenance capabilities, the BDS-3 has provided stable and accurate services, boasting a positioning accuracy of better than five meters.

The BDS system has multiple service capabilities, including satellite-based augmentation, short message communication, ground augmentation as well as international search and rescue. It will provide more diversified services with better performance and higher accuracy in 2020, Ran said.

A series of documents on the BDS system were also released to promote the understanding of the system and facilitate its use. The documents were published on the official website of the Beidou Navigation Satellite System.

The BDS system has seen thriving applications in many areas and has fostered an industrial ecosystem, Ran said.

The 22nm process navigation and positioning chip supporting BDS-3's new signal has a smaller volume, lower power consumption and higher accuracy, and has realized large-scale application.

The new generation of BDS system-related products including high-precision antennas, boards, and broadband radio frequency chips has been developed.

The BDS system has also seen increasing applications in emerging fields such as the industrial Internet and Internet of Things, as well as autonomous driving, parking and logistics.

With the arrival of the 5G commercial era, BDS is accelerating the integration with new technologies such as the next generation of mobile communication, blockchain and artificial intelligence, Ran said.

The BDS system is playing an important role in many industries including transportation, agriculture, forestry and energy. It supports China's dynamic monitoring system for more than 6.5 million vehicles. It will further facilitate railway transportation, inland river shipping, ocean navigation and the management of transportation infrastructure construction, Ran said.

Ran said China is continuously promoting the development of a legal system for satellite navigation.

China's applications for satellite navigation patents have increased rapidly, and the number has reached 70,000, ranking the first in the world.

More BDS-related national standards and special standards will be released to ensure a sound environment for its industrial application, Ran added. - Xinhua

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China Aerospace started from scratch, and by 2019, the country is ushering in a phase of superspace programs: the Chang’e-4 lunar probe was successfully launched, the BeiDou Navigation Satellite System began providing global services and the Long March rockets have been launched over 300 times. The emergence of each set of data proves that China, once trailing behind in the global space programs, has now earned its place in the global space-program competition, and is tapping into a new field. Check out this video and have a look at why China can build its own space station.

See China’s Tiangong-2 Space Station Re-Enter Earth’s Atmosphere

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China’s Tiangong-2 Space Station re-entered Earth’s atmosphere and burned up over the Pacific Ocean on July 19, 2019. A camera aboard Tiangong-2 captured imagery

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BDS, the Beidou Navigation Satellite System from China

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 http://t.cn/R5SsGFc

China eyes Silk Road countries for its Beidou satellite system

18 satellites to launch for BDS by 2018

China on Thursday vowed national efforts to complete its Beidou satellite navigation system to serve global users by 2020, with priority going to countries involved in the new Silk Road initiative.

The current goal of developing China's BeiDou Navigation Satellite System (BDS) is to "provide basic services to countries along the land and maritime Silk Roads and in neighboring regions by 2018, and to complete the constellation deployment of 35 satellites by 2020 to provide services to global users," said a white paper released Thursday by the State Council Information Office.

A "globalized" BDS would have "positive and practical significance" in terms of connectivity around the globe, especially the interconnection between China and Southeast Asian countries under the Silk Road plan, known as the Belt and Road initiative, Huang Jun, a professor at the School of Aeronautic Science and Engineering at Beihang University, told the Global Times on Thursday.

In line with the Belt and Road initiative, China will jointly build satellite navigation augmentation systems with relevant nations and promote international applications of navigation technologies, the white paper states.

To fulfill the 2018 goal, the country plans to launch some 18 satellites for the BDS by 2018, Ran Chengqi, BDS spokesperson, told a press conference on Thursday.

"In priority Chinese cities such as Beijing and Urumqi in Northwest China's Xinjiang Uyghur Autonomous Region, as well as low latitude countries like Thailand, the BDS is capable of offering a positioning accuracy of better than five meters," said Ran, who is also director of China's Satellite Navigation System Management Office.

Since 2015, the country has sent up seven more satellites into space in support of the BDS, including five navigation satellites and two backup satellites, Ran added, citing Sunday's launch of the BDS' 23rd satellite - a backup satellite - as an example.

In 2020, the BDS might offer different positioning accuracy choices and could provide centimeter-level accuracy under certain requirements, said Lu Weijun, a BDS expert at Beijing University of Posts and Telecommunications.

Unique features

Despite being a late starter compared with the US-developed GPS, China's BDS has unique features, Huang said, citing the BDS short-message communication service as an example.

"The short-message communication service is mainly useful in places with insufficient ground and mobile communication capabilities, such as deserts, seas and disaster areas where communication facilities have been destroyed," Lu told the Global Times.

More than 40,000 fishing vessels along China's coastline have been equipped with the BDS application terminals, Ran said, adding that they also provided better communication for islands near the coastline.

The BDS short-message communication service is mainly handled by five Geostationary Orbit (GEO) satellites, Lu said. Located above China, the five GEO satellites mainly serve a coverage area of Chinese territories and the Asia-Pacific region" and "could be used to locally enhance the signal in wartime, when other satellites might have been closed."

An independently designed global navigation and positioning network would also contribute to national security, Huang said. Industrial chain

China is developing chips, modules and other basic products based on the BDS and other compatible systems, and fostering an independent BDS industrial chain, the white paper noted.

"By the end of April, the BDS technology has been applied to more than 24 million terminals and over 18 million mobile phones," Ran said.

It is expected that by the end of this year, up to 50 million mobile phones will have been installed with domestic chips that will be compatible with three satellite navigation systems, namely the BDS, GPS and Russia's GLONASS, Wang Hansheng, vice president of Olink Star, a Beijing-based company that makes navigation satellite system products, told the Global Times.

By Ding Xuezhen Source:Global Times

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China implements Beidou navigation satellite system; World's top 4 navigation systems: GPS, GLONASS & Galileo

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China implements Beidou navigation satellite system

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China is implementing the second generation of its navigational satellite system, known as Beidou. The State Council Information Office held a press conference Tuesday to announce its Initial Operational Capability.

Ran Chengqi, the Director of the China Satellite Navigation Office introduced China’s global navigation satellite system. Beidou is independently established and operated by China. It can provide accurate, reliable all-time, all-weather positioning, navigation and timing services.


The State Council Information Office held a press conference Tuesday to announce its
Initial Operational Capability.

Ran says there are three steps in Beidou’s development. Ran Chengqi, director of China Navigation Satellite Office, said, "The first step was achieved in 2000 when the Beidou satellite demonstration system was established. It made China the third in the world to possess its own independent navigation satellite system. The second step is that the system will be able to provide services to the Asia-Pacific region by 2012. The third step is that by the year 2020, the system will be completed with global coverage."

China is implementing the second generation of its navigational satellite system, known as Beidou.

So far, ten satellites have been launched, forming the basic system. Ran Chengqi announced that from now on, Beidou will officially provide Initial Operational Service to China and its surrounding areas. Services include continuous positioning, navigation and timing.

Beidou is one of the four satellite navigation systems in the world. The other three are America’s GPS. Russia’s GLONASS, and Europe’s Galileo.

World's top 4 navigation systems

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Besides China's Beidou, there are three similar services around the world: the GPS of the US, the Russian Glonass and the EU’s Galileo.

The Global Positioning System, or GPS, was developed by the US in the 1970s and completed in 1994. It is the most widely used navigation system now. GPS provides location and time information in any weather, anywhere on or near Earth. GPS was originally run with 24 satellites, and four backup satellites have since been added. The system provides two types of signals, one for military use and the other, civil.

Russia’s GLONASS - or Global Navigation Satellite System developed since 1976, had achieved full coverage of Russian territory by 2010. Now the total number of satellites in orbit is 28, among them, 23 are in operation, 3 are under maintenance, and 2 are being tested. Though its precision is a little less than GPS, it is a strong performer with few operational interruption.

The European Union’s satellite navigation system is known as Galileo. It is the first navigation system to focus on civilian use, and aims to provide high-precision positioning services for European nations. Galileo is formed of 32 satellites and two ground operations centres. Compared with GPS, its precision level is ten times higher.

China has now developed the Beidou Satellite Navigation System, which can operate unmanned. It includes five static and 30 non-static satellites, and its locating precision reaches ten metres. It not only provides navigation, location and timing services, but also a communication service. Compared with the other systems, Beidou has a much stronger location performance.

As the Beidou Satellite Navigation System is further developed, China is now applying the system to more areas, such as the transportation of dangerous items, postal services and even car rental.

Navigation systems: GPS, GLONASS & Galileo

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Besides Beidou, there are three other satellite navigation systems in the world. They are the GPS of the United States, GLONASS of Russia, and GALILEO of the European Union.

GPS, or the Global Positioning System, was developed by the US in 1970s. It provides location and time information in all weather, anywhere on or near the Earth.

GPS was originally run with 24 satellites, and four backup satellites have been added. GPS provides two types of signals, one for military use and the other civil.

GLONASS, the Global Navigation Satellite System, is a radio-based satellite navigation system developed by Russia starting from 1976. By 2010, GLONASS had achieved 100 percent coverage of Russia's territory. In October 2011, the full orbital constellation of 24 satellites was restored, enabling full global coverage. It displays high-level performance in avoiding interruptions.

Galileo is a satellite navigation system developed by the Europeans. It is the first civil use oriented navigation system and aims to provide a high-precision positioning service for European nations. Galileo is formed of 32 satellites and two ground operations centers. Compared with GPS, its precision level is ten times higher.