China Launches First Thousand Sails Satellites
China has initiated deployment of its Thousand Sails satellite constellation, marking a significant step toward establishing a national global satellite internet network. Developed by Shanghai Spacecom Satellite Technology (SSST) since 2021, the program—originally designated G60—aims to rival existing mega-constellations such as SpaceX’s Starlink and the UK-based OneWeb. The Thousand Sails system is envisioned as a high-capacity, low-Earth-orbit communications network capable of serving both civilian and military needs.
In February, SSST disclosed it had secured 6.7 billion yuan (approximately US$943 million) in funding to advance the project. This capital infusion underscores the strategic importance placed on the constellation by both corporate stakeholders and the Chinese government. Officials have emphasized the need to secure scarce orbital slots and radio frequencies, which are increasingly contested as multiple nations and private companies race to populate low-Earth orbit with broadband satellites. The government’s involvement also reflects the dual-use nature of such infrastructure, with potential applications in defense communications.
On August 6, the first operational batch of 18 Thousand Sails satellites was successfully launched aboard a Long March 6A rocket. The mission placed the spacecraft into polar orbit, enabling coverage over high-latitude regions and facilitating global reach as the network expands. SSST’s phased deployment plan calls for 1,296 satellites in the initial stage, with 648 scheduled to be in orbit by the end of 2025 to achieve regional service capability. Once fully realized, the constellation will comprise more than 14,000 satellites, placing it among the largest planned networks in the world.
The choice of polar orbit for the initial launch aligns with established strategies for global internet coverage. Unlike equatorial or mid-inclination orbits, polar trajectories allow satellites to pass over nearly every point on Earth, ensuring service to remote and underserved areas. This approach mirrors elements of Starlink’s architecture, which leverages a dense mesh of low-orbit satellites to reduce latency and increase throughput compared to geostationary systems.
Thousand Sails is not the sole Chinese initiative in this domain. The Guowang (SatNet) project, managed by China Satellite Network Group, is another large-scale effort to create a Starlink-class constellation. While details on Guowang remain scarce, available information indicates plans for approximately 13,000 satellites, with the first launches anticipated within months. The existence of multiple overlapping programs suggests a broader national strategy to secure independent broadband infrastructure and reduce reliance on foreign systems.
From an engineering perspective, the deployment of such constellations presents formidable challenges. Launch cadence must be sustained over several years, requiring reliable medium-lift rockets like the Long March 6A and potentially heavier vehicles for later phases. Satellite manufacturing must scale to thousands of units, each equipped with advanced phased-array antennas, onboard processing, and inter-satellite links to maintain network resilience. Ground segment infrastructure—gateway stations, user terminals, and network management systems—must be developed in parallel to ensure seamless integration.
Spectrum allocation is another critical factor. Low-Earth-orbit broadband systems operate in Ku-band, Ka-band, and sometimes V-band frequencies, which are subject to international coordination through the International Telecommunication Union (ITU). Securing these allocations early is essential to avoid interference and guarantee service quality. The Chinese government’s active role in Thousand Sails reflects awareness of these regulatory constraints.
The scale of the planned constellation also raises questions about orbital traffic management. With tens of thousands of satellites projected from multiple operators worldwide, collision avoidance and debris mitigation become paramount. Systems such as autonomous maneuvering and continuous tracking via space surveillance networks will be necessary to maintain operational safety. Engineers and policy makers alike are increasingly focused on developing standards for responsible deployment.
The Thousand Sails launch marks China’s entry into the competitive field of global satellite internet provision, a sector poised to reshape connectivity for both terrestrial and mobile users. The coming years will reveal how effectively SSST and other Chinese operators can navigate the technical, regulatory, and logistical complexities inherent in building and maintaining such vast orbital infrastructures.
