BEIJING, June 25 -- China sent a new satellite of the BeiDou Navigation Satellite System (BDS) into space from the Xichang Satellite Launch Center in Sichuan Province at 2:09 a.m. Tuesday.
Launched on a Long March-3B carrier rocket, the satellite was sent to the inclined geosynchronous earth orbit. It is the 46th satellite of the BDS satellite family and the 21st satellite of the BDS-3 system.
The design of the BDS constellation is unique, including medium earth orbit (MEO), geostationary earth orbit (GEO) and inclined geosynchronous earth orbit (IGEO) satellites.
So far, there are already 18 MEO BDS-3 satellites, one GEO BDS-3 satellite, and two IGEO BDS-3 satellites sent into space.
After in-orbit tests, the new satellite will work with those BDS satellites already in orbits to improve the coverage and positioning accuracy of the system.
The new satellite and the carrier rocket were developed by the China Academy of Space Technology and the China Academy of Launch Vehicle Technology under the China Aerospace Science and Technology Corporation.
The launch was the 307th mission for the Long March series of carrier rockets.
gre issue关于发展全球性大学的写作提纲
GRE写作考试的四大特点
gre issue写作提纲思路与分析10
GRE写作优秀范文:审查的公正性
GRE考试作文ISSUE部分124篇真题(六)
gre issue写作提纲思路与分析14
GRE词汇天天记:回忆类
gre issue写作提纲思路与分析33
gre issue写作优秀实例:挽救濒危物种
GRE词汇:文艺类
GRE词汇:J-M 开头
GRE作文入门和进阶三
GRE词汇:B开头
gre issue写作提纲思路与分析16
GRE词汇天天记:E开头
GRE考试作文ISSUE部分124篇真题(二)
GRE考试作文ISSUE部分124篇真题(一)
新GRE填空技巧
GRE词汇:F开头
GRE词汇:新旧类
gre issue历史话题写作提纲
GRE词汇天天记:药剂类
gre issue写作提纲思路与分析11
gre issue写作提纲思路与分析13
GRE考试作文ISSUE部分124篇真题(四)
GRE写作优秀范文:研究历史的好处
GRE写作优秀范文:达到目标的手段
gre issue技术话题写作提纲
[GRE写作]GRE考生issue写作常见问题
GRE写作优秀范文:艺术价值
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |