国产热热热精品,亚洲视频久久】日韩,三级婷婷在线久久,99人妻精品视频,精品九热人人肉肉在线,AV东京热一区二区,91po在线视频观看,久久激情宗合,青青草黄色手机视频

 
 

Sheshan unveils large radio telescope

( Xinhua )

Updated: 2012-12-03

  Print Mail Large Medium  Small 0

A massive radio telescope for use in space observation was unveiled Sunday at the foot of Sheshan Mountain in Shanghai Sheshan in Oct 28.

The telescope will be used to track and collect data from satellites and space probes.

The newly-built radio telescope can pick up eight different frequency bands and also track Earth satellites, lunar exploration satellites and deep space probes, said Hong Xiaoyu, head of the Shanghai Astronomical Observatory.

"We hope that the new radio telescope will go into operation earlier so that we can use it to observe the unmanned lunar probe Chang'e-2," said Wu Weiren, chief designer of the lunar orbiter project.

The telescope will be used for Very Long Baseline Interferometry (VLBI), a type of astronomical interferometry used in radio astronomy, as it can collect accurate data and increase its angular resolution during astronomical observation.

China's VLBI system is made up of four telescopes in the cities of Shanghai, Beijing, Kunming, Urumqi, respectively, as well as a data center in Shanghai.

Radio telescopes differ from optical ones in that they use radio antennae to track and collect data from satellites and space probes. The first radio antenna used to identify astronomical radio sources was built by Karl Guthe Jansky, an engineer with Bell Telephone Laboratories, in the early 1930s.

Copyright ? China Daily All Rights Reserved, Constructed by China Daily
Official Website of the Sheshan National Tourist Resort, Shanghai
桐梓县| 乐陵市| 康马县| 高青县| 吴桥县| 兴业县| 安溪县| 横山县| 济宁市| 麻阳| 辰溪县| 乌拉特前旗| 连江县| 巴青县| 东海县| 资中县| 阜平县| 华安县| 三穗县| 漠河县| 西平县| 仁布县| 专栏| 青田县| 扶绥县| 曲麻莱县| 杭州市| 永城市| 水城县| 定日县| 台东市| 讷河市| 桐庐县| 济南市| 威远县| 民勤县| 肃北| 沙河市| 辉南县| 建德市| 临安市|