"At present, there are only four satellite navigation systems around the world: the US GPS, Russia's Glunas, European Galileo and China's Beidou. These four navigation systems have features: US GPS is earlier, the system is the highest; Russia Gloria is the strongest anti-interference ability; the European Galileo claims to be the most accurate system in the system; and we are fighting ...
According to the "Japan Economic News", the "Beidou Satellite Navigation System" "Beidou Satellite Navigation System" developed by China's enterprises, governments, universities and military, because the positioning accuracy will increase, the error rate will be 2 to 3 times before Under the distance of the minimum error reaches 2.5 meters, it will have the advantage of the US Global Positioning System (GPS) and the European Edition GPS "Galileo", which is expected to cover the world in 2020, and 2% in the global satellite positioning system market. City accounting.
At present, there are only four satellite navigation systems around the world: the US GPS, Russia's Glunas, Galileo and China's Beidou. Only the US GPS and the Russian Gronas system completely covers the world.
These four navigation systems have their own characteristics: US GPS is earliest, the system is the highest; Russia Gloria is the strongest anti-interference ability; the European Galileo is called the most sophisticated system; and our Beidou is the only text to chat. !
Beidou No. 3 accuracy is improved, will it be super GPS?
According to the report, China will launch the "Beidou No. 3" in November, "Beidou No. 3", is the end of 2017, the number of artificial satellites of "Beidou No. 3" will increase to 4, and it is expected that the number of 18 in 2018 is expected to reach 18 in 2018. In 2020, 35 satellites were reached to cover the world, providing satellite positioning services from all over the world.
In addition, China has developed a semiconductor chip used in "Beidou No. 3". The automotive navigation system and the positioning system of the shared bicycle will be launched in the near future. Beijing Baiklock Technology, Beijing Baiklock Technology, has currently announced the use of Beidou's satellite positioning information.
The report further pointed out that the Beidou Satellite Navigation System was developed by the Chinese military as an air defense system in 1994. In 2000, the launch test satellite put into operation, and the end of 2011 began to open to the people. Now "Beidou No. 2" satellite reached 23, mainly covering China and Western Pacific, but the positioning accuracy is only about 10 meters. Therefore, China has started the development of the "Beidou No. 3" positioning satellite in the accuracy error of 2.5 meters to 5 meters.
However, due to insufficient accuracy, most of the vehicle navigation systems have not used Beidou positioning systems. In the domestic satellite positioning system market in China, the use ratio of Beidou is only about 30%, which is in a disadvantage with the US GPS. With the use of Beidou No. 3, China hopes to increase the domestic utilization ratio to 60% in 2020, but lead GPS.
Posted by Europe and America, let's make up your mind.
On September 24, Yang Changfeng, chief designer of Beidou Satellite Navigation System, was on the CCTV "Opening", telling him that he is fighting with Beidou's ten years, telling that the North Bugo clock is almost a second. Yang Changfeng, Zhengmilitary, Major General, Deputy Minister of Electronic Information Basis of the Former General Equipment Department, is currently the Department of Equisical Development of the Military Commission.
In the early days of the development of Beidou No.2, China's satellite navigation technology is still behind Europe and the United States. At that time, China was only developed on the regional satellite navigation and positioning system. In 2000, the navigation and satellite of two static orbit were launched in 2000. In April 2003, the third "static track" satellite was launched, which basically formed a regional navigation and positioning system covered all China, which is called Beidou No.1. At that time, the Beidou system was still experimentally experimentally developed, and the technical parameters were behind the US GPS, which was also lagging behind the European Galileo system launched in 2002. Beidou No. 1 is only regional, and two-way signals are required, and their commercial and military value is not high. In this context, Europeans actively invite China to join the global satellite navigation system, and the Chinese are happy, and the two sides will be closed.
In 2003, China and European Dragon Sign Cooperation Agreement, China promised to invest 23 billion euros of huge funds, the first 70 million euros quickly hit it on the EU counter.
China and Europe's high-end technology cooperation, essentially breaking the United States-dominated European arms embargo, which is equivalent to abandoning the European and American Weapons Trade Regulations (ITAR) against China's specific countries, in order to end from legal level to China's arms The tear opens a mouth.
In 2005, European politics began to turn, before "Parent" German Prime Minister Schroeded, and the gratie Merkel served as a new Prime Minister Germany, and the influence of French Hirac gradually declined, and the beautiful Sarkozy is rising. The beautiful political figures have come to the stage, let Europe quickly close to the United States. In such a context, the European ASTA agrees to fix the previously developed emission frequency similar to the US GPS to minimize the possibility of generating signal conflicts after use. Technical re-correction spent a lot of money. As a return, Americans agreed to support Galileo in technology.
Galileo satellite operating frequency is the best in the world's second-class frequency band (first and other two, it is estimated that you also guessed, it is Mei Su), the EU pulls Chinese to fate, actually want to share with China, The EU is estimated that the strength of China has been studied, and it is also calculated that it is also an example. My country intends to introduce the core clock from Europe, but in the last signing agreement, European companies suddenly terminated their cooperation. At that time, China had invested 23 billion euros. The EU was calculated in the US pressures and its own calculations, and China excluded from the core project, that is, I want to take your Chinese money, then kick you out again. .
China not only can't enter the decision-making body of the Galileo plan, and even blocked by the European Space Agency in the development of technical cooperation, China is actually unreasonable, but it is necessary to undertake huge amount of money. This ending is very dissatisfied. .
The pit of Galileo incident has greatly stimulated our determination to build a navigation system independently. In 2010, China officially announced the frequency band of Beidou No.2 Navigation System with the same PRS band as European Galileo satellites. We used three years in 2007 to successfully develop the satellite of Beidou No. 2, successively launched on the sky, and directly accounted for Galileo's pit. , Seizure the band used by Galileo plans to make the Galileo system back.
Successfully grab the Satellite frequency of European Galist, sprinkle ~
Both China and the European Union have registered satellite emission frequencies to the International Telecommunications Union. The satellite communication channel is to take orders first, and the principle of first-serving is the development of Western developed countries. They think this is the equity principle of all countries. The reason is: You have the ability, you also play satellite, I didn't stop you, you don't want to be your own business.
Yang Changfeng disclosed in the speech. On April 17, 2007, more than ten manufacturers of the satellite of Beidou No.2 satellite were involved in the top of the big playground, and the satellite receiver was set into the first line, waiting for the satellite transmission signal. At 8 o'clock in the evening, when the first set of signals, more than a dozen users received such a signal, at this time, the entire playground was cheering, comrades hug each other, coming to congratulate this victory.
Yang Changfeng said that this situation has so far been unforgettable.
Why?
It turned out that successful receipt of the signal transmitted from the Big No. 2 from space, indicating that China legal has this frequency. This is a historic advancement, there is no frequency signal, the Beidou satellite system is unable to group, let alone the world's coverage.
The success of the Beidou No. 2 makes Europeans dumbfounded, what should I do? The frequency is robbed that the satellite has not yet launched. The Galileo satellite navigation system is therefore caught in a dilemma, not only the expenses are difficult, but the intersection is also taken prioritized by the Beidou No. 2.
The frequency resources of Earth's satellite communication are limited, with the growth of satellite business, routine C and KU band resources have been odd, L, S, expand C, expand KU, and KA bands in satellite technology It has also been gradually close to saturation. In such cases, China is certain to seize channel resources.
Europeans let us return the frequency to them
In 1994, the Beidou Project was officially established and put forward three steps of strategic goals. In the first step, 2003, an Beidou No. 1 satellite navigation test system was built, making China a country in the world with its own satellite navigation system. In the second step, build a satellite navigation system of Beidou No.2, which forms a service capacity over most of the Asia-Pacific region. In the third step, around 2020, Beidou satellite navigation system forms global coverage.
In October 2000, the first satellite of the Beidou Navigation System was officially sent to the track. Duration twilight, the second satellite successfully launched.
In December 2003, the Beidou No. 1 system officially began to provide services to domestic users, and there is currently 130,000 military users.
In April 2007, the first satellite in Beidou No.2 launched.
In October 2012, the Beidou No. 2 system successfully launched the 16th satellite and completed the satellite network.
On December 28, 2012, the Beidou No. 2 system was officially opened, and the service area covered the Asia Pacific region.
According to Yang Changfeng, Beidou, in April 2007, after the first satellite in Beidou No. 2, it was subjected to complex electromagnetic interference with a country, and satellite communications even blocked. China has taken out new satellite loads with powerful anti-interference ability in three months, which is not afraid of any interference.
In 2009, the delegation led by the European Aeronautics and Space Administration experts flew to Beijing, representing the EU Galileo satellite navigation system, requested to expand frequency disputes with China. The EUBT has obtained the frequency of "Blood" from American Hands, and the Europeans' "Galileo" system has long been technically designed to be modified, and the power of China Beidou system "relocation" to other channels .
We have resolutely disagree with this, and China has held nearly 20 Beidou No. 2 satellites in the sky. By the beginning of 2015, the ruthenious EU was forced to accept the frequency shared concept proposed by China, and the frequency of Central Europe was resolved.
Not just civilian, satellite guidance weapons will also make domestic
At present, Beidou No. 3 is now realized localization in the Tiantai atom, technical indicators, and the daily error is less than 2 nanoseconds. The navigation positioning accuracy is better than 1 meter.
At the end of 2012, the Upgrade Beidou Satellite Navigation System officially opened service to the Asia-Pacific region. At present, the construction of the Global System of Beidou No. 3 has been fully launched. It is planned to launch four satellites at the end of this year. From this year to 2020, China will send multiple types of nearly 30 Beidou satellite into the track. By 2020, Beidou Satellite Navigation System provides users with high-level navigation services to the world ...
In addition to the construction of the sky, China is still building a Beidou Enhancement System Gate on the ground. China has completed the construction task of 150 framework network baselines, 1200 strengthened density network bases, national integrated data processing centers, and 6 industry data processing centers, etc.).
In 2018, the second phase of the Beidou foundation enhancement system will be completed, and the rice grade, grade positioning accuracy of the major regions of the country, and the distribution of mid-size correction number of the encryption coverage zone and the post-handling millimeters. That is, "Thousands of Location Service System", including "Square" (real-time meter positioning service), "knowledge of" (real-time cm positioning service) and "see Micrometer-level decision service). . . . . . The network operation of the Beidou No. 2, clears the obstacles for the domestic satellite guidance weapon, which means that a large number of procurement and equipment, reliable satellite guides, greatly reducing the cost of precise strikes. The Chinese army has a blowout of the satellite guidance weapon model, and the Chinese military industry began to explode all kinds of remote satellite precision guidance weapons in 2014. Now our bomber and fighters use Beidou Satellite navigation, our Dongfeng-10A cruise missile, 300 mm remote rocket, satellite guidance bomb, etc. also uses satellite positioning. This means that our army is accurately guided by the cracking ability, especially the remote hitting capacity has made decisive breakthroughs. China's cruise missiles and precise guidance weapons can combat thousands of kilometers away. This is the huge strategic bonus brought by the Beidou system. The deterrence effect is comparable to nuclear weapons. At present, there are only three satellite positioning navigation systems in the world with military signals, which can be used to develop their satellite guidance weapons with their own satellite, they are China, the United States and Russia. With the satellite navigation you master, everything is fine ...
Original link: https://www.eeboard.com/news/beidou-4/4/4/
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