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The Beidou locator in China

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The Beidou locator in China

Release date:2017-10-25 Author: Clicks:

The glorious age of GPS is getting far away.

As the navigation system automatically implants mobile phones, the function of location has begun to spread. This also means that the satellite navigation and location service industry has entered a golden era of development.

White paper on the development of China satellite navigation and location-based services industry in the previously released "(hereinafter referred to as the white paper) statistics, in 2013 China's satellite navigation and location-based services industry total output value of more than 104 billion yuan, an increase of 28.4% over 2012, which the output value of over 10 billion yuan, accounting for 9.8%. China's total sales of navigation and positioning terminals have exceeded 348 million units. The number of smartphone sales with navigation functions reached 330 million.

In the future, this number may continue to increase at a geometric level. According to media reports, by 2020, China will launch more than 30 Beidou navigation satellites, complete the global target of construction, and have global service capability. This means that the Beidou satellite navigation system (hereinafter referred to as the "Beidou system") can cover a wider range and provide services with higher accuracy.

The Beidou system is China's independently developed and independently operated global navigation satellite system. It is recognized by the United Nations as the core supplier of four satellite navigation systems in the world, together with the US GPS, the Russian Glowna J system and the Galileo positioning system of the European Union.

"Small satellites, may be in the corner or tall buildings and other places are not good location, but now the satellite is more, positioning can be more rapid and convenient." The application of expert, Wuhan University professor Shi Chuang in an interview with die Zeit reporter pointed out that if the future has more than 30 Beidou satellite Beidou system and GPS can be used not only can racing together bridle to bridle, other countries in the world, in the international market is very competitive.

Policy support

Consultant senior researcher He Zaihua accepted an interview with die Zeit reporter pointed out that, at present, our navigation market is still dominated by the GPS half of the country, the application level compared with foreign Beidou navigation satellite positioning system, is obviously at a disadvantage; in civilian areas, far not reached the level of industrialization and Marketization. "The Beidou navigation market share is only 9.8%, most of which is used on the vehicle satellite navigator."

So in order to standardize the market of the Beidou system, let the Beidou system have a better space for development. In recent two years, the relevant departments promulgated the detailed policy of "the opinions of the general office of the State Council on promoting the development of geographic information industry" and "the long term development plan of the national satellite navigation industry".



In fact, in the dipper industry, the most important thing is to promote the application of the "Beidou" industry. In major projects, focusing on important areas of planning, actively promote the use of compass; surveying engineering, real estate mapping, environmental monitoring and other projects, and actively promote the use of compass; and public safety, transportation, disaster prevention and mitigation, forestry and water conservancy, meteorology, land resources, environmental protection, public security police etc. departments actively cooperate, vigorously promote the large-scale application of Beidou "products and services in these industries and fields.

"As a new industry, the Beidou system should grow and grow, and it can not be separated from the support of the national policy. However, the policy of China's satellite navigation and positioning industry is not yet detailed, which has affected the investment in the Beidou navigation system by enterprises and research departments, and directly led to the variety of user terminals, such as low variety, low level and high price. He Zaihua said.

Satellite navigation and positioning system is one of the national information infrastructure. The growth of the Beidou industry is conducive to improving the level of information and information security in China's economy and society. Only from the domestic substitution, there will be a large market, with the development of the continuous improvement, the future market space will be greater.

Beidou is a high-tech information industry with high added value. It can share the benefits of knowledge spillover through agglomeration effect. However, the spontaneous agglomeration takes a long time. Therefore, policy guidance is needed to accelerate industrial agglomeration.

20 years of competition and development

The technical approach and scheme of China's exploration of satellite navigation and positioning system began in the 80s of last century. In 1983, the aerospace expert Chen Yunfang proposed to use two geostationary orbit communications satellites in China for the first time to realize regional rapid navigation and positioning. In 1989, the demonstration and verification experiment of double star positioning using communication satellite in China proved that the technology system of Beidou satellite navigation test system is correct and feasible. In 1994, the construction of the Beidou satellite navigation test system was started.

In October 2000, the first satellite of the test system was put into orbit. In May 2003, the successful launch of the third Beidou experimental satellite indicates that China has become the third country in the world with autonomous satellite navigation system after the US and Russia.

In 2004, the Beidou satellite navigation system engineering project was launched, which is a large satellite network composed of 5 geostationary satellites and 30 non geostationary satellites. In April 2007, the first Beidou satellite navigation system satellite was successfully launched. Since then, the Beidou satellite began to launch a high density, especially since 2010, maintaining a frequency of about 4 per year.

Since December 27, 2011, the dipper has provided trial operation services to China and its surrounding areas. At this time, there are already 10 on orbit satellites of the Beidou satellite navigation system.



In 2012, the network process of the Beidou satellite navigation system was accelerated. The February launch of eleventh satellites, April and September, with a stone star way, will be twelfth to fifteenth satellites into space.

In December 27, 2012, the Beidou satellite navigation system announced that since the trial operation service was launched in December 27, 2011, the Beidou system has completed 4 arrows and 6 star launches, expanding the coverage of the system, enhancing constellation robustness and improving system service accuracy. At present, the operating satellite and the ground system work steadily, and the system service performance meets the design requirements through the testing and evaluation of all kinds of user terminals. From day to day, the Beidou system began to provide services such as continuous passive positioning, navigation, time service and other services to most of the Asia Pacific region.

At this point, the dipper has officially entered the navigation market and competes with the GPS, which is now a single largest in the market. In fact, as early as 2003, the Beidou system quietly entered the domestic navigation market, but most of the applications were focused on professional navigation such as fishing vessels at sea at that time.

He Zaihua believes that the advantage of the Beidou is to increase the communication function and locate the whole weather quickly, which is equal to the accuracy of GPS. He said that at present, in addition to improving the application level, the dipper should also strengthen policy support.

Behind the "big four"

Wuhan University, Tsinghua University, Beihang University, and China Aerospace Science and technology group are known as the "four giants" in the field of earth space. In 2012, the "four giants" set up a geospatial information technology synergistic innovation center for the first time, and devoted themselves to major national projects.

In the next 5 years, the challenges will be enough to affect the earth's space technology in China. The emergency response time of remote sensing data processing is reduced to the minute level. The location accuracy of high score satellite images is increased from 50 meters to 10 meters, and the accuracy of satellite navigation reaches the level of meter and the positioning accuracy reaches centimeter level.

But in fact, the accuracy of the Beidou project is not so smooth. At this point, Shi Chuang is deeply touched. He said that the accuracy of Beidou had never been done before. "We used to make GPS for nearly 20 years. On this basis, through several years of efforts, we finally made the Beidou system's high-accuracy.

Shi Chuang said that the Beidou and GPS really differ, from the satellite, the frequency, and some of the observed instruments and terminals are relatively small, this is very difficult.

In 2012 March, the Wuhan University to make the report to Sun Jiadong China academician, academician sun is very happy, but also specially went to Wuhan University, "at that time, Sun said, the Beidou system can be measured to an accuracy of a few cm, which is very helpful for the popularization and application of Beidou system in the future."

According to related reports, the accuracy of GPS navigation system has increased by more than one magnitude in comparison with the "Beidou high-precision" system, which indicates that our Beidou satellite navigation system is the first to achieve the precision navigation in the field of mass application for the first time. At the same time, the technology also realized the real-time positioning of the Beidou System in centimeter level in the field of professional application for the first time, marking that our Beidou system has the ability to replace GPS to achieve high-accuracy measurement.

"The past centimeter level of Surveying and mapping to use GPS, have to admit that GPS in surveying and high precision measurement in this field is a very technical means." Shi Chuang said,



But the use of GPS risks will be relatively large, China built more than 2000 stations, the data belong to the state secrets, if you have been using foreign software, security will be a problem, "the software will have a back door, Wu flower a few years is to solve this thing."

March 2013, Wuhan University once again invited academician sun, this is a "homework", sun academician and other experts are very happy, because this time the Wuhan University compass foundation of the system can be enhanced, and comparable to GPS, even better than the GPS, the hardware and software products in the future and national security related datum, precise mapping are no longer dependent on foreign.

Now, this technology has been popularized throughout the country, and many units and research institutions have begun to follow this matter. "China's satellite navigation system management office will arrange some large enterprises in the country, such as Ordnance Group and science and technology group, to do the national ground-based reinforcement network, so as to achieve the nationwide 1 meters accurate positioning.

In the future of China, Beidou system can be used everywhere where GPS can be used. High precision products require Beidou system. Vehicle monitoring must also use Beidou system.

In the future industry, the industrial standard configuration of the mobile Internet is the ability of positioning. Every cell phone and every terminal require location, location service and location. Beidou can be used. Location is the basic element of future information society. Getting location information and acquiring location service is a very important infrastructure.

Shi Chuang believes that the use of the dipper is not to say that GPS is not used, but that it is used better, because one more system is more stable and reliable. "With the Beidou system, the cost of the product is little increased, but the performance of the product has been greatly improved. In the long run, the prospect of the Beidou system is very good. " Shi Chuang is very optimistic about the future of the Beidou system, he said, now the mobile chip is also used, and in a few years, the Dipper will develop. The "Beidou" in China



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