www射-国产免费一级-欧美福利-亚洲成人福利-成人一区在线观看-亚州成人

USEUROPEAFRICAASIA 中文雙語Fran?ais
China
Home / China / Innovation

China to launch world's first X-ray pulsar navigation satellite

People's Daily Online | Updated: 2016-10-10 16:24

China to launch world's first X-ray pulsar navigation satellite
The China Academy of Space Technology has announced plans to launch the world's first X-ray pulsar navigation satellite (XPNAV-1) in November, Xinhua reported.

The move brings autonomous spacecraft navigation and a more precise deep-space GPS one step closer to reality.

X-ray pulsar navigation is an innovative navigation technique wherein periodic X-ray signals emitted from pulsars are used to determine the location of a spacecraft in deep space.

Current ground-based navigation methods are limited by the time delay between spacecraft and the Earth. However, for certain type of pulsars, called "millisecond pulsars," pulses of radiation occur with the regularity and precision of an atomic clock. As a result, in some scenarios, the pulsar X-ray can take less time to estimate a location. This leads to more precise measurements of a spacecraft’s location.

However, since X-rays from pulsars are absorbed by the atmosphere, scientists must launch satellites to continue research of the new technology.

According to Shuai Ping, chief scientist behind the research of XPNAV-1 satellite, the key aim of this satellite is to detect the details of X-ray signals of 26 nearby pulsars, and to create a "pulsar navigation database." This target could be achieved within five to 10 years, Shuai estimates.

X-ray pulsar navigation techniques are an improvement over the current navigation methods of the ground-based Deep Space Network (DSN) and the European Space Tracking (ESTRACK) network. The time delay affecting DSN and ESTRACK can be up to several hours for a mission taking place near the outer planets, and even longer for a mission outside the solar system.

Editor's picks
Copyright 1995 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
License for publishing multimedia online 0108263

Registration Number: 130349
FOLLOW US
主站蜘蛛池模板: 亚洲操图 | 色屁屁一区二区三区视频国产 | 成年女人看片免费视频播放器 | 操爽视频 | 亚洲精品色 | 一区二区影视 | 国产香蕉尹人综合在线观 | 亚州人成网在线播放 | www.久草视频 | 亚洲欧洲精品国产二码 | 亚洲欧美综合国产不卡 | 国产精品李雅在线观看 | 亚洲国产一区二区a毛片日本 | 国产午夜精品久久久久九九 | 亚洲成人福利 | 亚洲精品天堂一区 | 国产毛片久久久久久国产毛片 | 韩日一级片 | 国产成人啪一区二区 | 国产精品一区二区综合 | 久久99热精品免费观看欧美 | 亚洲毛片免费在线观看 | 91久久香蕉青青草原娱乐 | 久久成人毛片 | 成人区精品一区二区不卡亚洲 | 香蕉久久国产 | 亚洲高清免费在线观看 | 亚洲精品久久久久影 | 永久天堂| 日本加勒比网站 | 精品国产一区二区三区久久影院 | 久草视频在线看 | 久久国产乱子伦精品免费不卡 | 亚洲在线网 | 国产欧美综合精品一区二区 | 成人午夜大片免费看爽爽爽 | 黄页美女 | 国产成人mv在线观看入口视频 | 亚洲欧美日韩精品久久亚洲区色播 | 亚洲免费精品视频 | 亚洲精品一区二区中文 |