China Successfully Launched Fourth Data Satellite (Download PDF)


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China successfully launched Long March 3C rocket carrying the country’s fourth Tianlian - 1 data tracking and relay communications satellite from the Xichang Satellite Launch Center in the SW Sichuan in China.

China successfully launches its fourth data satellite

China Successfully Launches Its Fourth Data Satellite

China successfully launches its fourth data satellite

About Satellite

  • Height: 185 feet (56.3 meters) tall
  • Use: In mission is a three-stage launch vehicle.
  • Designed to deliver up to 3.8 metric tons of payload into a geostationary transfer orbit (GTO)
  • Designed to deliver up to 9.1 metric tons to low-Earth orbit (LEO).
  • Developed by China Academy of Space Technology (CAST) the Tianlian-1 No. 4 satellite is based on CAST’s DFH-3 bus like its predecessors
  • Weight is around two metric tons
  • Box-shaped DFH-3 platform has dimensions of 7.28 ft × 5.64 ft × 7.2 ft (2.22 m × 1.72 m × 2.2 m).
  • It features two deployable solar arrays and a communications antenna. The bus provides up to 1,700 W of power for a designed lifetime of 8 years.
  • Tianlian satellites host multiple communications payloads supporting a variety of services such as following

    • Fixed satellite communications.
    • International communications.
    • Regional data links.
    • Wideband communications.
    • Mobile communications.
    • Secure military communications.
    • Spacecraft relay.


  • China launched its first data relay satellite Tianlian I-01, in April 2008.
  • The second and third relay satellite was launched in July 2011 and July 2012 respectively.
  • Tianlian I and CTDRS-1 is a Chinese data tracking and relay communications satellite series.
  • Functionally it is similar to US Tracking and Data Relay Satellite System.

- Published/Last Modified on: November 25, 2016


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