Tianlian I

  (Redirected from Tianlian I-04)

Tianlian I (Simplified Chinese: 天链一号, Traditional Chinese: 天鏈一號, English: Sky Chain), also known as Tian Lian 1, TL-1, and CTDRS-1 is a Chinese data tracking and relay communications satellite series. Based on the DFH-3 satellite bus, it will provide communication coverage for manned Shenzhou missions, from Shenzhou 7 onwards.[1] Functionally, it is similar to the United States Tracking and Data Relay Satellite System.

Tianlian I
Country of originPeople's Republic of China
StatusIn service
Maiden launchTianlian I-01
25 April 2008
Last launchTianlian I-04
22 November 2016

The first satellite of the series, Tianlian I-01, was launched on the maiden flight of the Long March 3C carrier rocket, at 15:35 GMT on 25 April 2008, from LC-2 at the Xichang Satellite Launch Centre.[2] Tianlian I-01 is able to cover around half of the spacecraft's trajectory, compared to around 12 percent which had been covered using tracking stations and a fleet of ships. Tianlian I-02 was launched on 11 July 2011, Tianlian I-03 on 25 July 2012 and Tianlian I-04 on 22 November 2016.[3] The satellites are in geostationary orbit.[4]

Tianlian-1 satellitesEdit

  • Tianlian I-01
  • Tianlian I-02
  • Tianlian I-03
  • Tianlian I-04

Tianlian I-01Edit

Tianlian I-01
Mission typeCommunications
COSPAR ID2008-019A
SATCAT no.32779
Spacecraft properties
Spacecraft typeTianlian I
Start of mission
Launch date25 April 2008, 15:35:11 (2008-04-25UTC15:35:11Z) UTC[5]
RocketChang Zheng 3C
Launch siteXichang LC-2
Orbital parameters
Reference systemGeocentric
Longitude80.4° east
Perigee altitude35,638 kilometres (22,144 mi)[6]
Apogee altitude35,949 kilometres (22,338 mi)[6]
Inclination1.03 degrees[6]
Period1436.14 minutes[6]
Epoch23 January 2015, 21:35:31 UTC[6]

Tianlian I-01 (Simplified Chinese: 天链一号01星, Traditional Chinese: 天鏈一號01星) is the first Tracking and Data Relay Satellite (TDRS) launched by People's Republic of China, and the first satellite of Tianlian I TDRS series.[7] The satellite has multiple roles and will especially serve for China's manned spaceflight. Its first task could be for the Shenzhou 7 communication.


The satellite was launched successfully by the Long March 3C rocket in Xichang Satellite Launch Centre at local time 23:35 April 25, 2008. It was the 105th launch of the Long March Rocket Family. The rocket had 3 stages, 2 roll boosters[clarification needed], a 55 m height; and was liquid-fueled. Its initial weight was ~343 t.[clarification needed]

Its history includes:

  • 00:00 April 26, 2008, the Xi'an Satellite Control Centre received the feedback signal, which showed the satellite accurately entered its predesigned orbit.
  • 08:25 GMT April 30, 2008, the satellite was announced to be successfully set at E. 77 degrees over the equator.[8]

See alsoEdit


  1. ^ Stephen Clark (2008-04-25). "Chinese data relay spacecraft put into orbit". Spaceflight Now. Retrieved 2008-04-26.
  2. ^ Yan Liang (2008-04-25). "China blasts off first data relay satellite". Xinhua. Retrieved 2008-04-26.
  3. ^ Xin Dingding (2012-07-27). "Satellite launch completes network". China Daily. Retrieved 2012-08-17.
  4. ^ David Todd (2012-07-26). "Chinese data relay satellite TianLian-1C is launched successfully on a Long March 3C". Flightglobal. Retrieved 2012-08-17.
  5. ^ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 30 October 2013.
  6. ^ a b c d e "CTDRS Satellite details 2008-019A NORAD 32779". N2YO. 23 January 2015. Retrieved 25 January 2015.
  7. ^ 我国成功发射首颗数据中继卫星(组图)
  8. ^ China sets up first space station for spacecraft data relay_English_Xinhua Archived 2008-09-18 at the Wayback Machine