波多野结衣办公室双飞_制服 丝袜 综合 日韩 欧美_网站永久看片免费_欧美一级片在线免费观看_免费视频91蜜桃_精产国品一区二区三区_97超碰免费在线观看_欧美做受喷浆在线观看_国产熟妇搡bbbb搡bbbb_麻豆精品国产传媒

XICHANG, Sichuan: China successfully put its third Beidou navigation and positioning satellite into orbit early yesterday, a move indicating China has completed its own satellite navigation and positioning system.

The carrier rocket, Long March 3-A, blasted off at 00:34 (Beijing Time) from the Xichang Satellite Launching Centre in Southwest China's Sichuan Province. And 20 minutes later, the satellite separated from the rocket.

China sent the first two Beidou navigation satellites into orbit on October 31 and December 21 of 2000 respectively. Aerospace experts said the two satellites have been operating well.

The launch of the third satellite marks the formation of a complete and sound satellite navigation and positioning system to ensure all-weather navigation and positioning information, said the experts.

They said the navigation system, which serves as a radio beacon in outer space, can help subscribers know their location at any time and place with accurate longitude, latitude and altitude data.

China is one of the few countries in the world capable of developing such a system on its own and has also made some innovations in the positioning property of the system, experts said.

The China-made system will play an important role in economic matters, offering efficient navigation and positioning services for the sectors of transportation, meteorology, petroleum production, forest fire prevention, disaster forecast, telecommunications and public security.

Both the satellite and carrier rocket were developed by the Chinese Research Institute of Space Technology and China Academy of Launch Vehicle Technology, which are under the China Space Science and Technology Group.

New testing procedures were adopted for the launch, which not only helped reduce the time needed for preparing for the launch, but also improved the quality of the carrier rocket, enabling China to be at the forefront in this field around the world, said the experts.

The launch represents the 70th flight for China's Long March series of rockets and the 28th consecutive successful launch for the series since October 1996.

Xinhua