Long March 1 | Shijian 1
Shi Jian 1 (SJ-1) was the second Chinese satellite. It was designed and built by the Chinese Academy of Space Technology (CAST).
The 221 kg SJ-1 spacecraft was based on the DFH-1 satellite, from which it inherited the 1 m pressurized spherical structure, but it was powered by Silicon solar cells, which were mounted on 14 trapezoidal planes on the upper and lower hemispherical shells. Batteries and transmitters were housed in the pressurized compartment. SJ-1 was spin-stabilized.
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Mission Profile
Shijian 1 was a Long March 1 mission operated by Seventh Ministry of Machine Building Industry that lifted off from Launch Area 2A, Jiuquan Satellite Launch Center, People's Republic of China on March 3, 1971. The flight carried its payload on a technology mission to Low Earth Orbit. The launch was a success.