August 23, 2018 - China Launches Satellite Navigation System Expansion

On August 23, 2018, China launched two BeiDou-3 satellites into medium Earth orbit from Xichang Satellite Launch Center aboard a Long March 3B rocket. This launch brought the constellation closer to its goal of full global coverage by 2020. You're looking at a system designed to challenge GPS worldwide, offering accuracy down to one meter without ground enhancements. There's much more to this story if you keep going.

Key Takeaways

On August 23, 2018, China launched two BeiDou-3 satellites into MEO using a Long March 3B rocket from Xichang Satellite Launch Center.
The launch was part of China's three-step BeiDou strategy, progressing from domestic to regional to global navigation coverage.
BeiDou-3 targets a full 35-satellite constellation, combining 24 MEO, 3 GEO, and 3 IGSO satellites for worldwide coverage.
The system achieved global service launch in July 2020, with 30 satellites reaching full operational capability by June 2020.
BeiDou-3 integrates with GPS, GLONASS, and Galileo, improving horizontal accuracy by 27% and vertical accuracy by 52% in combined use.

What Did the BeiDou-3 Launch on August 23, 2018 Actually Accomplish?

On August 23, 2018, China launched two BeiDou-3 (BDS-3) satellites aboard a Long March 3B rocket from the Xichang Satellite Launch Center, successfully inserting them into medium Earth orbit (MEO) as part of the constellation's planned 24 MEO satellites for global coverage. This orbital deployment advanced BDS-3's expansion beyond BeiDou-2's Asia-Pacific regional focus toward full global service capability.

The launch significance extended beyond adding two satellites. You'd see these additions contributing directly to BDS-3's preliminary operational status achieved by late 2018, building momentum toward the constellation's completion in June 2020.

Each successful MEO placement strengthened redundancy for multi-GNSS receivers worldwide, reduced regional GPS dependence, and supported the industry's growth trajectory. This mission kept China's navigation ambitions firmly on schedule. BDS-3 satellites carry more accurate atomic clocks than their predecessors, enabling improved timing and navigation precision across the growing constellation.

The BeiDou program traces its origins to 1994, representing decades of development that progressed from BDS-1's domestic Chinese coverage in 2000 through BDS-2's Asia-Pacific regional services in 2012 before ultimately achieving the global service capability that BDS-3 was designed to deliver. Much like INTELSAT's geosynchronous architecture demonstrated that three evenly-spaced satellites could provide continuous global coverage, BDS-3's constellation design reflects how orbital configuration choices are critical to achieving resilient, uninterrupted global navigation services.

The Three-Step Strategy That Took BeiDou-3 Global

China's three-step strategy for BeiDou began in 1994 with BDS-1, a domestic-only system that completed construction by 2000 with two GEO satellites providing positioning, timing, and short message communication services across China.

This phased rollout marked China as the third country operating a navigation satellite system.

BDS-2 hit its strategic milestones by expanding coverage across the Asia-Pacific region, entering service in December 2012 and bridging domestic capability toward global reach.

Independent innovation drove the shift from active to passive positioning throughout each phase.

BDS-3 completed the three-step strategy, achieving full 35-satellite deployment by June 2020 and launching global services in July 2020. By October 2019, the in-orbit fleet consisted of 34 BDS satellites, comprising 15 BDS-2 and 19 BDS-3 operational satellites.

The full BDS-3 constellation consists of 24 MEO, 3 GEO, and 3 IGSO satellites, providing the orbital architecture backbone for its worldwide navigation coverage.

You can see how each deliberate phase built on the last, positioning China alongside GPS, Galileo, and GLONASS as a core worldwide GNSS provider.

How Accurate Is BeiDou-3 and What Systems Does It Work With?

With BeiDou-3 fully operational as a global system, you'd naturally want to know how well it actually performs.

In static positioning accuracy tests, BDS-3 delivers millimeter-level horizontal results and centimeter-level vertical results using Precise Point Positioning. Kinematic PPP reaches 2.6 cm North and 6.0 cm East with B1C/B2a signals, which outperform older B1I/B3I combinations by reducing RMSE up to 40.87%.

Real-time positioning lands between 2–3 meters, dropping under 2 meters in optimal conditions.

System compatibility is another strength. BeiDou-3 integrates smoothly with GPS, GLONASS, and Galileo. Combining GPS and BDS-3 improves horizontal accuracy by 27% and vertical by 52% over BDS-only setups. Published interface documents from 2017–2018 further ensure interoperability across global navigation platforms. Comparable to GPS, GLONASS, and Galileo in overall performance, this was confirmed by Ran Chengqi in an official statement at a Beijing news conference.

BeiDou-3 also extends its capabilities beyond navigation, as new-generation satellites support a short message service, adding a communication dimension that sets it apart from competing global systems. Unlike the early Transit system, which provided position fixes only about once per hour and left significant polar and equatorial coverage gaps, BeiDou-3 delivers continuous, three-dimensional global positioning across its full constellation.

BeiDou-3 broke out of its regional boundaries by scaling from 14–16 satellites serving Asia-Pacific under BDS-2 to a 30–35 satellite constellation delivering worldwide positioning, navigation, and timing services. China decommissioned 13 BDS-2 satellites and reserved five vacant slots for future growth, demonstrating a deliberate architectural shift rather than simple expansion.

You'll notice the three-orbit design drives this global reach. Medium Earth orbit satellites handle consistent worldwide coverage, inclined geosynchronous orbit satellites strengthen polar coverage at higher latitudes, and geostationary satellites deliver maritime augmentation across the South China Sea and strategic ocean routes. Together, they improve signal reliability in mountains, open waters, and remote regions.

BDS-3's integration with the Belt and Road Initiative further extends its practical reach into logistics, disaster relief, and precision agriculture worldwide. The upgraded constellation consolidates to 37 active satellites, positioning BeiDou as a direct alternative to Western-led systems like GPS and Galileo in the global navigation market. Beyond navigation, BeiDou-3 supports global short message communication and international search and rescue operations, expanding its role into a broader operational service ecosystem. This kind of private and government-driven expansion mirrors broader trends in space infrastructure, where the commercial space station market is projected to reach $12.93 billion by 2030 as nations and private operators diversify beyond legacy systems.

BeiDou-3's 2020 Coverage Goals and the 2035 PNT Vision

The full global coverage goal set for 2020 wasn't just an arbitrary milestone—it marked the moment BeiDou-3 transformed from a regional contender into a legitimate worldwide navigation system. China's global roadmap extended well beyond 2020, with policy implications touching infrastructure, IoT, and smart cities projected at USD36.64B output.

Here's what you need to understand about BeiDou-3's trajectory:

30 satellites achieved full operational capability by June 2020
Third-generation chips deliver one-meter accuracy without ground enhancements
Multi-GNSS compatibility integrates with GPS, GLONASS, and Galileo
BDS evolution continues toward 2035 with expanded positioning, navigation, and timing services

You're watching a system that didn't just meet its deadline—it built a foundation designed to challenge every major navigation network globally. The March 2018 launch carried two BeiDou-3 satellites aboard a Long March 3B rocket from Xichang Satellite Launch Centre, bringing the constellation to eight MEO satellites in orbit. At the time of reporting, the in-orbit fleet had grown to a total of 38 satellites, comprising 18 BDS-2 and 20 BDS-3 units across the constellation. Much like regulatory spectrum decisions shaped the pace of cellular network deployment in the United States, the speed of BeiDou's expansion reflects how deliberate policy choices can either accelerate or constrain the rollout of transformative communication infrastructure.