TianLian 1 Data Relay Satellite System

Last updated: 26 April 2008

	Search Search SinoDefence.com and its forum See Also DFH-3A Satellite Bus Space Tracking & Telemetry Network

The TianLian-1 (TL-1, TianLian = "Sky Link") data relay satellite (DRS) system has been developed by the China Academy of Space Technology (CAST). Similar to the U.S. Tracking and Data Relay Satellite System (TDRSS) in concept, the TL-1 is designed to support near-real-time communications between orbiting spacecraft and the ground control. The system will complement the existing ground-based space tracking and telemetry stations and ships to support future space projects of the PRC.

The initial experimental system consists of a ground-based simulation system and an orbiting satellite testing system. The ground-based simulation system consists of a fixed ground station and a mobile station, which are designed to test the satellite’s capability to support two ground users simultaneously. The ground stations, along with the central terminal station and control centre, will simulate the low-, medium-, and high-speed data communications with the data relay satellite in Ka- and S-band.

The orbiting satellite testing system is designed to examine and transmit the parameters of the orbiting data relay satellite and its onboard mission payloads. The system can also support the monitoring, testing and maintenance of the satellite’s data links with the ground stations. The first-generation system is based on the DFH-3A satellite bus, and will have a single satellite providing 50% of global coverage. The future second-generation system will be based on the DFH-4 satellite bus, with two satellites providing 85% of global coverage.

The main contractor for the ground-based simulation system and an orbiting satellite testing system is Beijing-based Space Star Technology Co. Ltd., a commercial company owned by the CAST. The first experimental satellite was launched on 25 April 2008 by a CZ-3C launch vehicle from the Xichang Satellite Launch Centre.

Launch Records