Behind the Beidou navigation system, the country s heavy weapon, why is there no main force in Qingb

may be because the aerospace major of Tsinghua University and Peking University is not as powerful as other schools, so there is no main figure of Qingbei.

Because the main research direction of Qingbei is not the Beidou navigation system, there is a precedence in hearing the Tao, and there is a specialization in the art industry.

Qingbei is a university, not a scientific research institution, and does not undertake scientific research projects of Beidou navigation, so you can't see people in Qingbei.

Behind the Beidou navigation system, there is no main figure of Qingbei, because this time Qingbei mainly provides some theoretical support, and the scientific and technological support is responsible for more professional science and technology schools!

Most of the scientific personnel and doctors of Tsinghua Peking University have made contributions to foreign countries, and many of them will work and live abroad for a long time because of heavy remuneration, and most of the main forces of Tsinghua Peking University do not work in the Beidou navigation system.

Because Qingbei is not good at this industry, every university has its own proficient major, and Qingbei is too.

The main reason is that the main force of Tsinghua University and Peking University generally goes abroad for development, and few of them stay in China for development.

1. In terms of transportation, the Beidou system is widely used in key transportation process monitoring, highway infrastructure safety monitoring, port high-precision real-time positioning and dispatching monitoring and other fields. As of December 2018, more than 6 million operating vehicles, 30,000 postal and express delivery vehicles, about 80,000 buses in 36 central cities, more than 3,200 inland navigation facilities, and more than 2,900 maritime navigation facilities have applied the Beidou system, building the world's largest dynamic supervision system for operating vehicles, effectively improving the efficiency of monitoring and management and the safety level of road transportation. According to statistics, in 2017 compared with 2011, the number of major road transport accidents and the number of deaths and missing persons in China decreased by 50%.

2. In terms of agriculture, forestry and fishery, the Beidou-based agricultural machinery operation supervision platform realizes remote management and precise operation of agricultural machinery, serves more than 50,000 sets of agricultural machinery equipment, increases the output of precision agriculture by 5%, and saves 10% of agricultural machinery fuel consumption. The positioning and short message communication functions have played a prominent role in applications such as forest fire prevention. It provides services such as ship position monitoring, emergency rescue, information release, and management of fishing vessels entering and leaving the port for fishery management departments, and more than 70,000 fishing boats and law enforcement vessels across the country have searched and installed Beidou hail leakage terminals, and rescued more than 10,000 people in total.

3. In terms of hydrological monitoring, it has been successfully applied to the real-time transmission of hydrological monitoring and reporting information in mountainous areas, improving the accuracy of disaster forecasting and providing important support for the formulation of flood control and drought control scheduling plans.

4. In terms of meteorological monitoring and forecasting, a series of meteorological monitoring and forecasting Beidou terminal equipment has been developed to form a system application solution, which has improved the observation accuracy, self-source knowledge and activation level and emergency observation ability of the domestic high-altitude meteorological sounding system.

5. In terms of communication time system, we have made breakthroughs in key technologies such as optical fiber remote reaching, developed an integrated satellite timing system, and carried out the application of Beidou two-way timing.

6. In terms of power dispatching, the application of power time synchronization based on Beidou has created conditions for high-precision time application in power accident analysis, power early warning system, protection system and so on.

7. In terms of disaster relief and mitigation, based on the navigation, positioning, and short message communication functions of the Beidou system, it provides real-time disaster relief command and dispatch, emergency communication, rapid reporting and sharing of disaster information, and other services, which significantly improves the rapid response ability and decision-making ability of disaster emergency rescue.

8. In terms of public safety, more than 400,000 police terminals across the country are connected to the police location service platform. The BeiDou system has played an important role in the security of major events such as the Asia-Pacific Economic Cooperation meeting and the G20 summit.

Nine days to catch the moon, down to the five seas to catch turtles.

Worldwide, there are four global satellite navigation systems endorsed by the United Nations Satellite Navigation Committee, namely China's Beidou, the United States' GPS, Russia's GLONASS, and the EU-led Galileo. Since 2012,The Beidou Navigation Satellite System officially provides regional services and has become one of the four major service providers of the international satellite navigation system.

How has the Beidou Navigation Satellite System changed our lives in the past few years? What changes will the Beidou-3 global navigation satellite system bring to people's production and life?

We can analyze it from the following aspects:

In the mountain city of Chongqing, the lane-level positioning location data of 9,000 buses in the urban area is transmitted to the management background in real time to ensure operational safety and improve operational efficiency. Citizens can get more accurate bus arrival times, and city managers can better monitor the driving behavior of vehicles, such as speeding, parking, etc.

By upgrading the GPS positioning terminal to the Beidou high-precision positioning terminal, the positioning error of the bus is greatly reduced, the vehicle safety monitoring level is improved, and the passenger travel experience is improved.

In China, more than 20,000 drones are deployed every day across the country to spray pesticides and inspect power grids.

Qianxun Positioning uses the Beidou ground augmentation stations established across the country to receive Beidou satellite positioning signals in the air, calculate satellite positioning errors in real time, and provide high-precision positioning services for hundreds of millions of users.

Compared to traditional manned machinesThe unmanned operation machine can be disturbed by light and can work at night, with the characteristics of high work quality, which can save 50% of labor costs and reduce waste in operation.

Detection systems installed in all corners of dilapidated houses can detect changes in motion down to the millimeter leveland even sense ground vibrations caused by large trucks passing by.

With the millimeter-level high-precision positioning capability and cloud computing capability provided by Qianxun Positioning, the system can quickly determine the "disease" of the house according to the "medical records" of the previous dangerous house. If the tilt and settlement of the house exceed a certain safe value, the system will immediately sound an alarm, buying valuable time for personnel evacuation and rescue.

With high-precision positioning, the Beidou satellite navigation system will become an infrastructure for spatio-temporal intelligence.

Spatiotemporal intelligent infrastructure can provide a unified temporal and spatial benchmark for various smart devices and application scenarios.

Currently,The launch of the Beidou global networked satellite was successfully completed, and the Beidou system opened a new starting point to serve the world.

Yang Changfeng, chief designer of Beidou Satellite Navigation System Engineering, said

By 2035, China will build a more ubiquitous, more integrated, and more intelligent national comprehensive positioning, navigation, and timing system, and further improve its spatio-temporal information service capabilities.

Beidou will serve the world with stronger functions and better performance for the benefit of mankind.

China's Beidou Satellite Navigation System.

It is a global satellite Huilu navigation system developed by China.

It is also the third mature satellite navigation system after GPS and GLONASS. Beidou satellites also play a very big role in life.

First, the aspect of daily life.

Our daily life navigation and positioning are inseparable from Beidou navigation, users can not only achieve accurate positioning, but also get real-time road conditions while driving, and carry out optimal route planning; For some ride-hailing.

will determine the ride according to the route determined by the navigation**; And we can see on the web according to the navigation where the purchased express arrives; For those who take the bus on a daily basis, it is possible to check the location ...... of the bus according to the navigation system

Second, engineering construction.

Not long ago, Shanghai Yangshan Deepwater Port.

The "5G+L4 intelligent driving heavy truck" launched has realized one-time accurate parking and automatic queue driving at close range, which has improved Yangshan Port.

Intelligent transfer efficiency and the East China Sea Bridge.

Driving ability. These intelligent heavy trucks are based on the precise positioning of navigation, so as to achieve accurate parking and queue driving. It is also of great help to highway construction, which can reduce the pressure and intensity of highway engineering construction survey work, and improve the efficiency ......of engineering construction

Third, agriculture and animal husbandry.

Nowadays, grazing is no longer the same as in the past, where people follow the livestock around, and only need to install a chip on the ear of each cow, and the Beidou satellite can be used to see the location of each cow at any time. In this way, the manpower and time of herding cattle will be greatly saved. For growers to spray pesticides, it is also the beginning of the use of drones to spray pesticides, drones according to the positioning system of Beidou navigation, can ensure that pesticides are sprayed on every piece of land, to a large extent to save manpower and time ......

The establishment of Beidou navigation has facilitated people's lives to a great extent, and the navigation system is in all aspects of daily life, and now people are more and more dependent on the navigation system, and the navigation system will bring us unexpected surprises in the near future.

The Beidou Navigation Satellite System (BDSS) is a regional active three-dimensional satellite positioning and communication system (CNSS) developed by China, and is the third mature satellite navigation system after the Global Positioning System (GPS) of the United States and GLONASS of Russia. The Beidou Navigation Satellite System is committed to providing high-quality positioning, navigation and timing services to users around the world, and its construction and development follow the four principles of openness, autonomy, compatibility and progressiveness. At 4:47 a.m. on April 10, 2011, China successfully launched the eighth Beidou satellite into a predetermined transfer orbit in space with a Long March-3A carrier rocket at the Xichang Satellite Launch Center.

At 5:44 on July 27, 2011, China successfully launched the ninth Beidou satellite into the scheduled transfer orbit with the "Long March-3A" carrier rocket at the Xichang Satellite Launch Center.

The Beidou system will complete a comprehensive test in October and cover the Asia-Pacific region next year.

The construction of China's Beidou satellite navigation system has entered a critical period, and a comprehensive test will be completed in October 2011, with the conditions to provide initial services to most parts of China, and will provide services for users in the Asia-Pacific region next year.

One of the great things about the Beidou system is that there is no upper limit to the number of ordinary users in theory.

Because the basic function of the third generation of Beidou is a passive positioning system, the essence of each navigation satellite is to report the current time (t0) and position (x0, y0, z0) two data to the user (client). The user (client) only needs to receive signals from four satellites to accurately determine its own position and time.

The user side needs to solve 4 parameters, i.e., the three-dimensional coordinates x, y, z and time difference on the earth. By observing 4 satellites, you can construct 4 equations and solve 4 unknowns. It is said that after the completion of Beidou, more than 12 satellites can be guaranteed over the Asia-Pacific region, and the greater the number of satellites, the higher the accuracy.

At present, there are four navigation systems that are more popular in the world, namely the GPS of the United States and the Russian ones"GLONASS", European"Galileo"and China's Beidou system.

The first three global positioning systems all use medium-circle satellite orbits, and Beidou is the only system that uses three orbits, and the geostationary orbit and oblique synchronous orbit are tailored for China or Asia, with higher accuracy and better to meet China's positioning needs.

1. High precision.

China's Beidou accuracy has been improved to less than 1 meter, and China's latest generation of Beidou navigation satellites have been developed, the new generation of Beidou will use quantum technology, its accuracy is better than the United States GPS, will be within meters.

2. Adopt three-frequency signal.

Beidou uses a three-frequency signal, and GPS uses a dual-frequency signal, which is a late-mover advantage of Beidou. The three-frequency signal can better eliminate the influence of high-order ionospheric delay, improve the positioning reliability, enhance the data preprocessing ability, and greatly improve the ambiguity fixing efficiency. Moreover, if there is a problem with one frequency signal, the traditional method can be used to locate the other two frequencies, which improves the reliability and anti-interference ability of the positioning.

3. Step-by-step opening.

Beidou's 14 satellites in orbit use five geostationary orbit (GEO) satellites, five inclined geosynchronous orbit (IGSO) satellites, and four medium-altitude circular orbit (MEO) satellites. These satellites can be used in the Asia-Pacific region, while GPS needs to be fully activated before it can be used. It is conducive to accelerating the commercial process of Beidou, further improving the follow-up system, and accelerating the maturity of the Beidou industry chain.

The Beidou navigation system is the third maritime satellite navigation system recognized by the United Nations after the GPS of the United States and the "GLONASS" of Russia.

At its meeting from 17 to 21 November 2014, the Maritime Safety Committee of the International Maritime Organization (IMO), which is responsible for setting international maritime standards, formally integrated China's Beidou system into the global radio navigation system.

This means that after the GPS of the United States and the Russian "GLONASS", China's navigation system has become the third maritime satellite navigation system recognized by the United Nations. Kevin Polpeter, an expert at the University of California who specializes in China's space program and information warfare, said the Beidou system could provide sufficiently accurate positioning information within its coverage.

The Beidou navigation system can be summed up in one word"Cow", real cow. What about the cows? The positioning accuracy of the Beidou system is within 8 meters in the vertical direction and 4 meters in the horizontal direction. Beidou navigation has high precision, high reliability, high insurance, and multi-function.

High precision, Beidou can provide the most precise centimeter-level service, decimeter and sub-meter are not a thing;

High insurance, the Beidou satellite global navigation system adopts multiple reliability "reinforcement" measures, which can maximize the insurance coefficient of the system.

High reliability, Beidou navigation provides a global coverage system, it has 20 satellites working at the same time, which is more reliable than a single satellite system.

Multi-functional, like now fishermen go out to sea to fish, fish positioning, tracking have been used.