Long March 3

Long March 3
Name	Long March 3
Manufacturer	China Academy of Launch Vehicle Technology
Country	People's Republic of China
First flight	1984-01-29
Status	Retired (superseded by variants)

Long March 3 The Long March 3 is a Chinese orbital launch vehicle developed for geosynchronous transfer orbit missions and satellite deployment. Originating from earlier Chinese launchers, it played a pivotal role in the expansion of satellite services for organizations such as the China National Space Administration, the Chinese Academy of Sciences, and commercial operators. The rocket links advances from programs involving the Shanghai Academy of Spaceflight Technology, Xi'an Satellite Control Center, and various launch complexes.

Design and Development

The design and development phase involved collaboration between the China Academy of Launch Vehicle Technology, the Shanghai Academy of Spaceflight Technology, the China Aerospace Science and Technology Corporation, and institutes tied to the Chinese Academy of Sciences. Engineers drew on heritage from the Long March family stemming from early work at the Jiuquan Satellite Launch Center, Xichang Satellite Launch Center, and Taiyuan Satellite Launch Center. Project teams included specialists who had worked on programs connected to the People's Liberation Army Rocket Force, the Shanghai Institute of Satellite Engineering, and research groups attached to Tsinghua University and the Harbin Institute of Technology. International contacts and observers from agencies like Roscosmos, the European Space Agency, and the National Aeronautics and Space Administration noted design features similar to vehicles used by Arianespace and Kosmotras. Policy and procurement reviews involved ministries and commissions analogous to the National Development and Reform Commission and relevant bureaus of the State Council.

Technical Specifications

The vehicle employed a multi-stage architecture with a cryogenic upper stage using liquid hydrogen and liquid oxygen propellants developed by institutes comparable to the Institute of Mechanics of the Chinese Academy of Sciences and propulsion teams formerly aligned with the Aerospace Systems Engineering School. Structural components were produced by factories in Shanghai and Xi'an, with avionics derived from systems tested on platforms associated with Beidou constellation prototypes, communications satellites like those from Sino Satellite Communications, and meteorological platforms similar to Fengyun. Guidance, navigation, and control units integrated sensors and actuators comparable to suppliers used by China Electronics Technology Group Corporation and inertial systems researched at the National University of Defense Technology. Launch infrastructure interfaces matched ground support equipment at Xichang, involving integration facilities used by CAST and launch operations staffed by China Satellite Launch and Tracking Control General.

Launch History

The inaugural flight took place from Xichang Satellite Launch Center, following the trajectory planning practices observed in missions by international operators including Arianespace, International Launch Services, and Roscosmos. Subsequent launches supported orbital insertions for operators such as China Satellite Communications, China Mobile, and state research programs connected to the Chinese Academy of Sciences and the National Satellite Meteorological Center. Flight campaigns coordinated with range safety and telemetry units similar to those at Jiuquan and Taiyuan, and drew oversight from agencies analogous to the Civil Aviation Administration of China for downrange tracking. Launch manifests included satellites planned by organizations like China Aerospace Science and Industry Corporation and scientific payloads from universities including Peking University and Nanjing University.

Payloads and Missions

Payloads carried by the vehicle included communications satellites, meteorological platforms, and experimental spacecraft developed by institutions such as the China Academy of Sciences, the National Satellite Meteorological Center, and several provincial university laboratories. Commercial payloads were procured by operators similar to China Satcom and regional broadcasters, while scientific missions involved collaborations with research institutes at Tsinghua University, Shanghai Jiao Tong University, and the Chinese Academy of Agricultural Sciences. Satellite buses and transponders were manufactured by entities aligned with China Electronics Technology Group Corporation and China Aerospace Science and Industry Corporation, supporting services comparable to television broadcasting, data relay, and remote sensing used by entities like the State Oceanic Administration and the Ministry of Natural Resources.

Operational Performance and Reliability

Operational assessments referenced telemetry analyses and failure investigations conducted by teams within the Academy of Launch Vehicle Technology and external reviews by academic partners at Beihang University and the Harbin Institute of Technology. Performance comparisons were drawn with contemporaneous medium-lift vehicles operated by agencies such as Roscosmos, the European Space Agency, and NASA, and with commercial providers like Arianespace and International Launch Services. Reliability metrics influenced insurance and procurement decisions by satellite operators including China Satcom and regional telecom providers, and informed subsequent upgrades implemented by manufacturing units in Shanghai and Xi'an.

Variants and Evolution

The platform evolved into upgraded variants incorporating enhanced upper stages, extended payload fairings, and improved propulsion systems developed by research groups at the Chinese Academy of Sciences and propulsion manufacturers in Sichuan and Shaanxi. These evolutionary branches paralleled development paths seen in families like Falcon, Proton, and Ariane, with iterative improvements overseen by institutions such as the National Space Science Center and advanced tests conducted at facilities analogous to the China Academy of Aerospace Propulsion Technology. The lineage influenced later launcher designs used by commercial ventures, state enterprises, and academic consortia, and supported the growth of satellite constellations and national space infrastructure initiatives.

Category:Chinese launch vehicles