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SJ 18

SJ 18 [CCTV]

SJ 18 (Shijian 18) was a Chinese experimental geostationary satellite based on the new DFH-5 Bus.

SJ 18 was to be the maiden flight of the DFH-5 ultra-high-performance satellite platform, featuring a high-thrust ion propulsion. It provides payload power up to 28 Kilowatts.

The satellite hosted a Ka-band high-throughput communications payload of 70 Gbps. Also an optical infrared laser communications terminal for downlinks with data rates of upt to 4.8 Gbit/s was on board. Reportedly an experimental quantum communications payload, similar to the one on QSS (Mozi), was also carried.

The satellite was launched in June 2017 on a CZ-5 rocket from the Wengchang cosmodrome, but failed to reach orbit.

A similar, but even larger SJ 20 was launched in 2019 on the third CZ-5 rocket from the Wengchang.

Nation: China
Type / Application: Technology
Operator: CAST
Contractors: CAST
Equipment: Ka-band high-throughput payload, infrared laser communications terminal
Configuration: DFH-5 Bus
Propulsion: ? × LIPS-300 Ion engines
Power: 2 deployable solar arrays, batteries
Mass: 7600 kg
Orbit: GEO
Satellite COSPAR Date LS Launch Vehicle Remarks
SJ 18 2017-F03 02.07.2017 We LC-101 F CZ-5

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