In 2020, Beidou Positioning will cover the whole world. How much difference is there between Beidou and GPS

Beidou navigation satellite system (BDS), as a native Chinese child, is about to welcome &ldquo* Etiquette;
In 2000, China began to test the Beidou navigation system, launched the Beidou generation navigation satellite, and started the road of independent navigation system research and development
Over the past 18 years, a total of 32 Beidou navigation satellites have been successfully launched from Beidou generation 1 to Beidou generation 3
China's Beidou has become the world's fourth largest satellite navigation system after GPS of the United States, GLONASS of Russia and Galileo of Europe
At present, China's Beidou system has covered nearly 30 “ The Belt and Road ” Countries along the route provide services to 2
7 billion people, and plan to complete the launch of 18 Beidou satellites around 2018, which is “ The Belt and Road ” Countries along the route will provide basic services and achieve global navigation capability by 2020
With the gradual maturity of the Beidou navigation system, many news about Beidou navigation flows out from time to time
So, what is the real development of Beidou navigation? What are the other problems& ldquo; At present, the development of Beidou navigation has made great progress compared with that before, but there is still a gap to fully extend it to all aspects of social life& rdquo; Fuliang, an independent Telecom analyst, said in an exclusive interview with the communications industry daily (www
com)
To achieve global navigation by 2020, in fact, the development of Beidou navigation in China has gone through three stages, namely, from the first generation Beidou navigation satellite (Beidou-1) to the third generation Beidou navigation satellite (beidou-3)
Beidou-1 belongs to the pilot phase of Beidou navigation
Since october2000, it has launched three satellites, mainly to provide services for China; Beidou-2 launched 29 satellites in April, 2007, aiming to cover China and its surrounding areas; Beidou-3 was launched in November, 2017
The first batch of networking satellites (2) were launched with “ One arrow and two stars ” It is planned to build a global navigation system by 2020
At present, the construction of the Beidou global system is accelerating
Five test satellites have been launched
It is expected to gradually improve the positioning and timing accuracy, anti-interference, system capacity and other performance
It will have global service capability in 2020
At the same time, the construction of Beidou satellite navigation system should follow the principle of openness and autonomy, that is, the construction goal of Beidou navigation is to provide high-quality free services to global users
In addition to truly realizing China's independent research and development, it should also actively carry out extensive and in-depth exchanges and cooperation with countries around the world, promote the compatibility and interoperability of various satellite navigation systems, and promote the development of satellite navigation technology and industry& ldquo; Time and space information are indispensable infrastructure for the national economy
China must master autonomous and controllable satellite navigation technology
On the basis of self-control, China's Beidou navigation technology needs to explore compatibility and interoperability with other satellite navigation systems such as GPS, so as to increase positioning accuracy and service quality and promote the development of ground applications& rdquo; Sunjiadong, an academician of the Chinese Academy of Sciences, said in an interview with a media
In terms of independent research and development, the basic products of satellite navigation mainly include chips, modules, antennas, boards, etc
at present, China has realized the independent control of basic products of satellite navigation and formed a complete industrial chain
As the core of basic satellite navigation products, chips are gradually getting rid of the dilemma of over reliance on American GPS chips in recent years
Enterprises represented by aerospace Huaxun, Beidou Xingtong, Hagrid communications, hollystone, zhonghaida, Dongfang Lianxing, Guoteng electronics, taidou microelectronics, Huada Beidou, Zhenxin technology, etc
are helping China's Beidou industry to go out of the “ Missing core ” The pain of
According to the data, as of april2017, the sales of Beidou navigation chip modules had exceeded 30million
The sales of high-precision boards and antennas accounted for 30% and 90% of the domestic market respectively, and were exported to more than 70 countries and regions
In terms of openness, Beidou satellite navigation system has been compatible with GPS and GLONASS
It is reported that the compatibility of different satellite navigation systems involves the coordination of spectrum and orbit and the interoperability between satellites
The coordination of spectrum and orbit is relatively easy, but the interoperability is difficult
Insufficient penetration in the social field although Beidou navigation has the ability of regional positioning and has gradually formed a complete independent R & D industrial chain, its penetration in social life and other fields is not high
According to the test evaluation, in areas where the number of Beidou satellites is well distributed, the signal quality of the Beidou system is generally equivalent to that of GPS
The positioning accuracy can reach 10 meters, the speed measurement accuracy is 0
2 meters / second, and the timing accuracy is 10 nanoseconds
It can provide high-precision and reliable positioning, navigation, and timing services for all kinds of users around the world all day and all day
It also has the ability of short message communication, and has initially possessed the ability of regional navigation, positioning, and timing
At the same time, most mobile phones in the market, such as Huawei, Xiaomi, Nubia, oppo, vivo and other smart phones, support Beidou navigation
Because the mobile phone supporting Beidou navigation is mainly related to the mobile phone positioning chip
At present, most of the chip products of Qualcomm, MediaTek and Huawei Hisilicon, the mainstream mobile phone chip manufacturers, support Beidou navigation
Therefore, in theory, Beidou satellite navigation system can be applied to transportation, agriculture, forestry, fishery, public security, earthquake prevention and disaster reduction, special care, public application, electric power, finance, industry and other industries
But in fact, at present, the big ecology of Beidou navigation system has not been formed
In China, only specific fields and maritime fields are dominated by Beidou navigation, and most other fields also rely on GPS system
For example, in the communication field, at present, the vast majority of China's communication base stations rely on GPS for timing and positioning, which will have great risks and uncertainties
A communication expert pointed out in his article that in addition to the active application of the Beidou System in military industry, infrastructure fields such as government affairs, communications, railways, shipping, as well as some emerging industries such as Internet +, Internet of vehicles, UnionPay network, UAV, basically rely on GPS for timing and positioning, and the security risk is very high