Tiansuan / BUPT Orbital Computing Research Platform
This project focuses on an open platform for orbital computing research.
BUPT's Tiansuan platform supports research code and space-server experiments on real satellites. BUPT-2/3 launched in May 2025 with university-developed servers and communications payloads; BUPT-4 followed in July 2026 with computing and satellite-network security modules. This is an open research program with a planned 24-satellite second phase, not a verified 24-satellite fleet or commercial data-center service. The October 10 CCF and ReedPilot program account reports cumulative deployment of 16 low-orbit satellites and seven ground stations, supporting experiments by more than 60 organizations. These attributed totals do not establish current availability or a completed 24-satellite fleet.
Beijing University of Posts and Telecommunications / Spacety · Research satellites launched
Scope: Shared computing & storage · A shared computing or storage platform, or a program developing that infrastructure. Classification describes intended use, not operating capacity.
Figures retain their disclosed units and scope. Launched hardware does not establish demonstrated performance; targets may change. Not disclosed means no figure in the reviewed sources.
PROJECT RELATIONSHIPS
Suppliers & project partners
China Computer Federation (中国计算机学会)
Research participant
Program organization: ReedPilot (一苇宇航)
Partnership
CCF and ReedPilot published a joint Tiansuan research call with seven topics addressing onboard AI, reliable storage and related orbital-computing research.
An open call, not a selected grant recipient or supplier procurement order. Approximately USD 30,062 (CNY200000) is indicated per topic.
Announced 10 Oct 2026 · Evidence checked 26 Oct 2026
Program organization: Beijing University of Posts and Telecommunications (北京邮电大学)
Supplier selected
Solar arrays
Solar wings developed by Beijing Xingyuan Space Technology and reported by Huairou Science City to be supplying BUPT-4's entire spacecraft power load in orbit.
A government account corroborates the supplier and reported in-orbit operation. No independently measured spacecraft power, procurement buyer, contract instrument, signing date or value is disclosed. The separate100kW research program is not a BUPT-4 specification. July30 is the earlier company-attributed release date; the government account is datedAugust3,2026.
Announced 30 Jul 2026 · Evidence checked 26 Sept 2026
Program organization: Beijing University of Posts and Telecommunications (北京邮电大学)
Partnership
Satellite bus · Payload integration
Spacety jointly developed BUPT-4 / TY49 with BUPT and describes the earlier jointly developed BUPT-1/2/3 research satellites.
Source confirms joint spacecraft development, not a public purchase order. The 2025 BUPT-2/3 account names Changsha Tianyi Research Institute; the current source uses Spacety's company name. Contract buyer, award dates and values are not established.
Announced 28 Jul 2026 · Evidence checked 26 Sept 2026
Program organization: Beijing University of Posts and Telecommunications (北京邮电大学)
Supplier selected
Attitude control components
Fiber-optic gyroscope developed by Tianjin Huanyu Xingtong and flown on BUPT-4 for its first integrated flight validation.
Named flown component, with qualification testing continuing. No direct procurement buyer, signing date, price, long-term operating result or production order is disclosed.
Announced 28 Jul 2026 · Evidence checked 26 Sept 2026
Program organization: Beijing University of Posts and Telecommunications (北京邮电大学)
Supplier selected
Launch capacity
Delivered Gravity-1 Y4 launch on 22 July 2026, the flight that carried BUPT-4 / TY49.
Provider association matches the named vehicle, flight number and launch date across the Beijing government account and Spacety's BUPT-4 report (https://cn.spacety.com/news/detail/62). This does not establish BUPT as the direct launch buyer, the contracting chain, a signing date or price.
Announced 24 Jul 2026 · Evidence checked 26 Sept 2026
Program organization: Beijing University of Posts and Telecommunications (北京邮电大学)
Supplier selected
Launch capacity
Delivered Zhuque-2E Y2 launch on 17 May 2025, carrying the BUPT-2/3 research satellites.
Provider association matches the vehicle, flight number, date and time in the State Council/Xinhua account with the BUPT-2/3 launch account (https://www.ncsti.gov.cn/kjdt/kjrd/qtrd_kjrd/202505/t20250519_205161.html). Direct launch buyer, booking instrument, signing date and price remain unknown.
Announced 17 May 2025 · Evidence checked 26 Sept 2026
Publish further phase-two launches and current experiment/server availability; no exact next launch date is established
Manual review 30 Oct 2026. Compared the university's BUPT-4 launch account and supplier solar-wing report. Added spacecraft mass class and substrate construction. Per-node compute, memory and IT power remain undisclosed in those sources. Last full profile review 18 Oct 2026. Primary body last observed 18 Oct, 06:48 UTC. Source monitoring: unavailable. Source collection and substantive profile review are separate checks. Plans and dates may change.
CCF and ReedPilot report 16 deployed satellites and seven ground stations, and open seven research topics with applications due November 30. No grant recipients or new deployment dates are identified.
The project repository describes an open orbital research platform, application review and code deployment on actual satellites. It identifies BUPT-1 as available, while its old 2024 forecast for BUPT-2/3 is superseded by the 2025 launch report.
Huairou Science City reports Xingyuan solar wings supplying BUPT-4’s full spacecraft electrical load with stable operation. The article date differs from the July 22 launch and July 30 earlier report. Separate 100 kW R&D is not BUPT-4 capacity.
A release attributed to Beijing Xingyuan Space Technology reports its solar wings supplying BUPT-4 in orbit. Its separate future 100 kW development ambition is not a BUPT-4 power specification.
The Beijing Economic-Technological Development Area confirms Gravity-1 Y4 launched nine satellites on 22 July 2026, including Tianyi-49; separate primary evidence identifies Tianyi-49 as BUPT-4.
BUPT's own account hosted by Beijing Daily confirms satellite-computing and satellite-network security modules. Onboard computing, security and space–ground cooperation tests are planned; no numerical compute result is supplied.
Spacety reports joint development with BUPT and launch on Gravity-1 Y4. The 50 kg-class spacecraft carries a camera and a Tianjin Huanyu Xingtong fiber-optic gyroscope for flight validation; future cooperation with the previous BUPT satellites is planned.
The GDEC organizing committee's July1 account reports the two new Tiansuan ground stations in operation at the June29 forum. These are ground-support facilities, not additional spacecraft or proven commercial compute capacity.
The two satellites launched on Zhuque-2E Y2. The government-hosted Science and Technology Daily account names BUPT and Changsha Tianyi Research Institute as developers, and BUPT space servers, laser communications and networking payloads. Phase two targets 24 satellites.
China's government portal says LandSpace's Zhuque-2E Y2 launched six satellites on 17 May 2025. Separate project evidence identifies BUPT-2 and BUPT-3 among the payloads; this page itself does not name them.
