|Start of mission|
|Launch date||16 January 2010, 16:12:04UTC|
|Rocket||Chang Zheng 3C|
|Launch site||Xichang LC-2|
|Perigee altitude||35,775 kilometres (22,230 mi)|
|Apogee altitude||35,807 kilometres (22,249 mi)|
|Epoch||24 December 2013, 10:17:46 UTC|
Compass-G1, also known as Beidou-2 G1, is a Chinese navigation satellite which will become part of the Compass navigation system. It was launched in January 2010, and became the third Compass satellite to be launched after Compass-M1 and Compass-G2.
Compass-G1 was launched at 16:12 GMT on 16 January 2010, and was the first orbital launch to be conducted in 2010. The launch used a Long March 3C carrier rocket, flying from the Xichang Satellite Launch Centre. It was the first flight of a Long March 3 series rocket since an upper stage engine problem in August 2009 which left the Palapa-D satellite in a lower than planned orbit. The injection systems on the rocket's third stage engines had filters fitted to them in an attempt to prevent a recurrence of this failure. The Compass-G1 launch demonstrated this new system.