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Xinhua News Agency reporter Li Guoli
Independent satellite navigation system，It is a political power、An important symbol of an economic power。
From the establishment of the project in 1994 to the completion of the Beidou-1 system in 2000，From officially providing regional services in 2012 to serving the world in 2020... 26 years，Chinese Beidou people always adhere to aerospace to serve the country、The mission and sentiment of a technologically powerful nation，Explore a path from scratch、From existence to excellence、From active to passive、The development path with Chinese characteristics from regional to global，Thus making our country become the successor to the United States、The third country in the world after Russia to have an independent global satellite navigation system。
July 31, 2020，Beidou-3 global satellite navigation system officially completed and opened。Its completion and opening，This is a great and happy event for the country，Many people laughed and cried。Among，Scientific researchers in the pioneering stages of many projects，Already gray-haired，But the "independent innovation" they fostered during the construction of the Beidou system、Open Fusion、United as one、The New Era Beidou Spirit of Pursuing Excellence，Has become the spirit of “two bombs and one star”、The bloodline of manned spaceflight spirit continues，Continuously inspiring Beidou people in the new era to move forward。
Sky bet sports betting APP October 31, 2000，sky bet online sports betting China's first self-developed navigation and positioning satellite "Beidou Navigation Test Satellite" was successfully launched at the Xichang Satellite Launch Center。Photo by Xinhua News Agency reporter Zha Chunming
The unprecedented “Chinese Road”
When my country was preparing to build the Beidou satellite navigation system，The world has built a global satellite navigation system。
At first，We also want to learn from other countries，However, we encountered some difficulties in the process。National security interests above all else，So，Beidou system must be autonomous and controllable。
May 25, 2003，my country uses the "Long March 3A" carrier rocket at the Xichang Satellite Launch Center，Successfully sent the third "Beidou-1" navigation and positioning satellite into space。Photo by Xinhua News Agency reporter Li Gang
To achieve positioning and navigation anywhere on the earth at any time，It is necessary to ensure that users can "see" at least 4 positioning and navigation satellites anywhere on the earth at any time。The GPS global system is composed of 24 working satellites。
At that time，my country’s weak foundation，It is impossible to “build the world in one step”。1983，Academician Chen Fangyun, one of the advocates of the “863 Project”，Creatively proposed the concept of “Double Star Positioning”。This plan，can be the smallest constellation、Minimum investment、The shortest period to achieve "from scratch"。
Later，Academician Sun Jiadong, the first chief engineer of the Beidou system，Further organize research and propose a sky bet online casino sky bet online sports betting “three-step” development strategy，Decided to build a test system first，Then build a regional system，Finally built a global system。
This is Sun Jiadong at the Xichang Satellite Launch Center (photo taken on December 15, 2010)。Photo by Xinhua News Agency reporter Li Mingfang
January 10, 1994，State approves Beidou-1 project。6 years later，my country has completed the Beidou No. 1 system，Officially became the third country in the world to have an autonomous satellite navigation system。
There is no way in space，But the Chinese Beidou people have forged a Chinese path with distinctive characteristics。
Unique “China Solution”
2004，my country officially starts the construction of Beidou-2 project。
China’s Beidou still has not adopted the single orbit constellation configuration of other global satellite navigation systems，Once again uniquely chose the characteristic development path of mixed constellations，The first in the world to use geostationary orbit and inclined geosynchronous orbit satellites as the backbone、Hybrid constellation with medium earth orbit satellites。
For Beidou-2, which mainly serves the Asia-Pacific region，This "mix and match" combination can achieve the best coverage with the least number of satellites，The high-orbit satellites used have stronger anti-obstruction capabilities，Performance characteristics are more obvious especially in low latitudes。In addition，Hybrid constellations can also provide navigation signals at multiple frequencies，Able to improve service accuracy through the combined use of multi-frequency signals。
"Hybrid constellation is the first of its kind in the world。”Chief Designer Sky bet online sports betting APP download Sky bet sports betting APP of China Beidou Satellite Navigation System Engineering、Yang Changfeng, academician of the Chinese Academy of Engineering, said。
In the deep night sky, the stars are changing.
April 14, 2007，The first Beidou-2 satellite was successfully launched，my country has officially entered the era of Beidou-2 regional network deployment。Until October 25, 2012，Our country has launched 16 Beidou-2 satellites into space within 5 and a half years。
April 14, 2007，my country uses the "Long March 3A" carrier rocket at the Xichang Satellite Launch Center，Successfully sent a Beidou navigation satellite into space。Photo by Xinhua News Agency reporter Li Gang
December 27, two months later，Our country officially announced: starting today，Beidou system continues to retain the active positioning of the Beidou satellite navigation test system (Beidou-1)、Based on two-way timing and short message communication services，Officially providing continuous passive positioning to most regions in the Asia-Pacific、Navigation、Time service and other services，This marks the completion of my country’s Beidou-2 regional satellite navigation system and the official start of providing regional services。
The “unique skill” of Chinese wisdom
Compared with other global satellite navigation systems，The Beidou-3 global satellite navigation system, which was officially completed and opened on July 31, 2020, does have its own "unique skills": in addition to providing global positioning and navigation timing services，Also provides short message communication、Star-based enhancement、International Search and Rescue、Precision single point positioning、Diverse services such as foundation reinforcement，Can better meet the diverse needs sky bet online casino of users，A veritable “all-rounder”。
Sky bet online sports betting APP download July 10, 2018，my country uses the Long March 3A carrier rocket at the Xichang Satellite Launch Center，Successfully launched a Beidou-2 satellite。Published by Xinhua News Agency
Especially short message service，Other satellite navigation system users can only know "where I am"，Beidou users not only know “where I am”，You can also tell others "where I am" and "what I am doing"，Created a unique service model integrating communication and navigation。
"When other means of communication fail，Beidou short message communication can be used to transmit distress information、The last insurance to save lives。”Director of China Satellite Navigation System Management Office、Said Ran Chengqi, Deputy Chief Designer of Beidou Satellite Navigation System Engineering。
June 23, 2020，The last networking satellite of my country’s Beidou-3 global satellite navigation system was ignited and launched at the Xichang Satellite Launch Center。Photo by Xinhua News Agency reporter Jiang Hongjing
Now，Beidou-3 has greatly upgraded and expanded the functions of this special service，Among them，The communication capability in the Asia-Pacific region can reach 14,000 bits (1,000 Chinese characters) each time，Can transmit text，Can also transmit voice and pictures，Regional short message communication capability increased nearly 10 times at a time，The number of supported users at each time is increased from 500,000 to 12 million。In addition，Global short message communication capability can reach 560 bits (40 Chinese characters) each time。
In the smart agriculture pilot demonstration zone of Beidahuang Group Hongwei Farm Co., Ltd.，Staff set the working path of the unmanned rice transplanter (photo taken on May 11)Sky bet online sports betting APP download 。According to introduction，Unmanned intelligent rice sky bet online casino transplanter applies Beidou satellite positioning system，Automatic obstacle avoidance during field operations、U-turns and turns。Photo by Xinhua News Agency reporter Zhang Tao
Inter-satellite link technology allows satellites to communicate with each other，Is the key to Beidou-3’s autonomous navigation。This is because，Operation of Beidou system，Ground stations are required to detect and inject information into satellites，But sometimes the satellite is not in the sky that the ground station can cover，The inter-satellite link not only enables communication and data transmission between dozens of Beidou satellites，Can also measure distances from each other，Automatically "maintain formation"，Conduct “one-stop measurement and control” for satellites moving overseas。
In addition，The Beidou-3 global system can also provide satellite-based enhancement、International Search and Rescue、Precision single point positioning、Diverse services such as foundation reinforcement，Can better meet the diverse needs of users。
Audiences visited and experienced electric vehicles based on Beidou satellite navigation system at the 12th China Satellite Navigation Achievements Expo (photo taken on May 26)。Photo by Xinhua News Agency reporter Peng Zhaozhi
This is an intelligent connected car based on the Beidou satellite navigation system taken at the 11th China Satellite Navigation Annual Conference (photo taken on November 24, 2020)。Photo by Xinhua News Agency reporter Tang Wenhao
The standard service accuracy of my country’sky bet online sports betting s Beidou system is between 6 meters and Sky bet football 10 meters，Higher precision services require the assistance of Beidou augmentation system。Currently，Our country has built the Beidou foundation to strengthen "a nationwide network"，Real-time meter level available nationwide、Submeter level precise positioning service。
Beidou Portable Mobile Emergency Monitoring Station photographed at the 12th China Satellite Navigation Achievements Expo (photo taken on May 27)。This equipment is currently used in disaster relief work。Photo by Xinhua News Agency reporter Peng Zhaozhi
Around 2035，Our country will build a system based on Beidou system，More ubiquitous、More integrated、More intelligent national comprehensive positioning, navigation and timing system。Yang Changfeng said: "Looking back now，The Beidou “three-step” plan we formulated at that time was more in line with China’s national conditions，Beidou’s development route and constellation plan design are full of the practical wisdom and pragmatic spirit of the Chinese nation，Contributed Chinese wisdom and Chinese solutions to the international satellite navigation technology system。”
Editor: Wang Yixiao