BeiDou
China's global satellite navigation system, fully operational since July 2020.
The BeiDou Navigation Satellite System (BDS) is a satellite-based radio navigation network owned and run by the China National Space Administration. It supplies location and time data to any receiver on or near Earth that has a clear line of sight to at least four BDS satellites, and it works without the user sending any signals. The current version, BeiDou-3, provides worldwide coverage for timing and navigation, joining Russia's GLONASS, Europe's Galileo, and the US's GPS. Its satellites are arranged in three orbit types: 24 in medium Earth orbit for global reach, 3 in inclined geosynchronous orbit for the Asia-Pacific region, and 3 in geostationary orbit for China. The BeiDou-3 system became fully operational in July 2020. In 2016, it achieved millimeter-level accuracy after post-processing using a nationwide network of reference stations. In 2023, the International Civil Aviation Organization recognized BeiDou as a global standard for commercial aviation.
Earlier versions include BeiDou-1, a regional system with three satellites that mainly served China from 2000 until its design life ended in December 2012. BeiDou-2, also regional, had 16 satellites—6 geostationary, 6 in inclined geosynchronous orbit, and 4 in medium Earth orbit—and began offering positioning services across the Asia-Pacific in November 2012, where it was more accurate than GPS. By 2015, fifteen years after the system’s launch, it generated $31.5 billion annually for major companies like China Aerospace Science and Industry Corporation, AutoNavi, and Norinco. The industry grew over 20% each year in value, reaching $64 billion in 2020.
The system’s official English name comes from the Big Dipper, known in Chinese as "BeiDou," meaning "Northern Dipper." Ancient Chinese astronomers used this name for the seven brightest stars in Ursa Major, which historically helped navigators find the North Star, making the name a metaphor for the system’s purpose.
The concept of a Chinese satellite navigation system was first proposed by Chen Fangyun and colleagues in the 1980s. The 1991 Gulf War showed how GPS gave the US a battlefield advantage, and the 1993 Yinhe incident—along with an alleged case during the 1996 Third Taiwan Strait Crisis—highlighted the risk of being denied GPS access. This spurred China to start its own system in 1994.
Quick Facts
- Country
- China
- Operator
- China National Space Administration
- Coverage
- Global
- Precision
- 3.6 m (global, public) / 2.6 m (Asia Pacific, public) / 10 cm (encrypted)
- Satellites nominal
- 30
- Satellites current
- 35 (Beidou-3) 15 (Beidou-2)
- First launch
- 31 October 2000
- Last launch
- 23 June 2020
Facts from the source article.
Lore & Background
The original idea of a Chinese satellite navigation system was conceived by Chen Fangyun and his colleagues in the 1980s. The Gulf War in 1991 showcased how GPS gave the US complete advantage on the battlefield, and in 1993 China realized the risk of denied access to GPS during the Yinhe incident, giving impetus to the creation of its own indigenous system, which officially began in 1994. The first satellite, BeiDou-1A, was launched on 30 October 2000, followed by BeiDou-1B on 20 December 2000. The BeiDou-1 system, consisting of three satellites, provided navigation services mainly within China until its design life expired in December 2012. BeiDou-2, a regional system with 16 satellites, began providing positioning services in the Asia-Pacific region in November 2012, where it was more accurate than GPS. The BeiDou-3 system, fully operational in July 2020, comprises satellites in three types of orbits and provides global coverage. In 2015, fifteen years after the satellite system was launched, it was generating a turnover of $31.5 billion per annum for major companies, and the industry grew to $64 billion in 2020.
Reader's Guide
BeiDou's significance lies in its establishment as a fully independent global navigation satellite system, providing an alternative to GPS, GLONASS, and Galileo. Its development was driven by strategic concerns following the Gulf War and the Yinhe incident, which highlighted the risks of reliance on foreign systems. The system's phased rollout—from experimental BeiDou-1 to regional BeiDou-2 and finally global BeiDou-3—demonstrates a deliberate, stepwise approach to achieving full capability. BeiDou-3's millimeter-level accuracy with post-processing, achieved in 2016, and its recognition by the International Civil Aviation Organization in 2023 as a global standard for commercial aviation underscore its technical maturity and international acceptance. The system has also seen military adoption by countries such as Pakistan, Saudi Arabia, and Argentina, and interoperability agreements with Russia's GLONASS. Its integration into smartphones from major manufacturers, including Xiaomi, Samsung, Sony, and Apple, has made it accessible to billions of users. The industry's rapid growth, from $31.5 billion in 2015 to $64 billion in 2020, reflects its economic impact and the expanding ecosystem of BeiDou-enabled services.
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