Compass points way to positioning system

时间：2006-11-13 08:51:08

（单词翻译:单击）

Nov.13 - China is expected to launch two navigation satellites early next year as part of a plan to build a global navigation positioning network, aerospace1 insiders say.

 

The launch of the two "Beidou" (Compass) satellites, scheduled for the beginning of 2007, is expected to cover China and parts of neighbouring countries by 2008, before being expanded into a global system, the sources confirmed over the weekend.

 

The planned network will be a constellation2 of 35 satellites, including five geo-stationary Earth orbit satellites and 30 medium Earth orbit satellites, Xinhua News Agency quoted informed sources as saying.

 

The system will provide two navigation services.

 

The service open to commercial customers will provide them with positioning accuracy within 10 metres, speed accuracy within 0.2 metres per second and timing3 accuracy within 50 nanoseconds.

 

In addition to the "open" level of service, the system will also offer safer "authorized4" positioning, velocity5 and timing communications service.

 

To make the country's first-generation navigation system more compatible with other global satellite navigation systems, China is willing to co-operate with other countries, the aerospace sources said.

 

The United States initiated6 its "Navstar Global Positioning System (GPS)" in 1973, the world's first GPS service. The former Soviet7 Union started launching satellites for its space-based navigation system, the Global Orbiting Navigation Satellite System (GLONASS), in the early 1980s.

 

The European Space Agency kicked off its own positing8 system, the Galileo Project, in 2002.

 

China has sent three Compass navigation test satellites into orbit between 2000 and 2003.

 

The existing three-satellite Compass navigation system has played an important role in offering accurate positioning and time references for sectors9 including surveying, telecommunications, transportation, meteorology, forest fire prevention, disaster forecasting and public security.

 

China imported its first GPS receivers in the 1980s, and has become a major GPS user.

 

The China National Space Administration said last month the country will improve the "Beidou" navigation satellite test system, and implement10 the "Beidou" navigation satellite system project.

 

In listing the major tasks through 2010, China's Space Activities in 2006, a policy document released by the State Council Information Office on October 12, said China will "independently develop application technologies and products in applying satellite navigation, positioning and timing services."

 

The country will also set up a standard positioning service supporting system and popular application terminus related to satellite navigation and positioning, expanding the application fields and market.

 
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1 aerospace CK2yf     
adj.航空的，宇宙航行的
参考例句：
  • The world's entire aerospace industry is feeling the chill winds of recession.全世界的航空航天工业都感受到了经济衰退的寒意。
  • Edward Murphy was an aerospace engineer for the US Army.爱德华·墨菲是一名美军的航宇工程师。
2 constellation CptzI     
n.星座n.灿烂的一群
参考例句：
  • A constellation is a pattern of stars as seen from the earth. 一个星座只是从地球上看到的某些恒星的一种样子。
  • The Big Dipper is not by itself a constellation. 北斗七星本身不是一个星座。
3 timing rgUzGC     
n.时间安排，时间选择
参考例句：
  • The timing of the meeting is not convenient.会议的时间安排不合适。
  • The timing of our statement is very opportune.我们发表声明选择的时机很恰当。
4 authorized jyLzgx     
a.委任的，许可的
参考例句：
  • An administrative order is valid if authorized by a statute.如果一个行政命令得到一个法规的认可那么这个命令就是有效的。
5 velocity rLYzx     
n.速度，速率
参考例句：
  • Einstein's theory links energy with mass and velocity of light.爱因斯坦的理论把能量同质量和光速联系起来。
  • The velocity of light is about 300000 kilometres per second.光速约为每秒300000公里。
6 initiated 9cd5622f36ab9090359c3cf3ca4ddda3     
n. 创始人 adj. 新加入的 vt. 开始，创始，启蒙，介绍加入
参考例句：
  • He has not yet been thoroughly initiated into the mysteries of computers. 他对计算机的奥秘尚未入门。
  • The artist initiated the girl into the art world in France. 这个艺术家介绍这个女孩加入巴黎艺术界。
7 Soviet Sw9wR     
adj.苏联的，苏维埃的；n.苏维埃
参考例句：
  • Zhukov was a marshal of the former Soviet Union.朱可夫是前苏联的一位元帅。
  • Germany began to attack the Soviet Union in 1941.德国在1941年开始进攻苏联。
8 positing f415b767090fd6ad3bb1c43cec532284     
v.假定，设想，假设( posit的现在分词 )
参考例句：
  • Involves a contrast-a positing of walks that are opposites. 给我们看见强烈的对照﹕两种完全相反的生活样式。 来自互联网
  • Global Positing System (GPS) technology has been widely used in many field. 全球定位系统(GPS)技术已经在许多领域得到广泛的应用。 来自互联网
9 sectors 218ffb34fa5fb6bc1691e90cd45ad627     
n.部门( sector的名词复数 )；领域；防御地区；扇形
参考例句：
  • Berlin was divided into four sectors after the war. 战后柏林分成了4 个区。 来自《简明英汉词典》
  • Industry and agriculture are the two important sectors of the national economy. 工业和农业是国民经济的两个重要部门。 来自《现代汉英综合大词典》
10 implement WcdzG     
n.(pl.)工具，器具；vt.实行，实施，执行
参考例句：
  • Don't undertake a project unless you can implement it.不要承担一项计划，除非你能完成这项计划。
  • The best implement for digging a garden is a spade.在花园里挖土的最好工具是铁锹。

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