轨道卫星

• Low earth - orbit satellites have become indispensable for u . s . military communications , gps navigation for smart bombs and troops , and for real - time surveillance . the chinese test highlights the satellites ' vulnerability
  近地轨道卫星已成为美国军方不可或缺的通讯工具，对与智能炸弹和集群的gps导航和实时监控而言尤为如此。中国的实验聚焦于卫星的弱点。
• We find the solution to this quandary in the field of coding theory , which engineers apply when transmitting digital information through noisy environments ( as in orbital satellite communications )
  我们发现可以解决这个困境的答案在编码理论里（见前页错误传讯的克星编码理论） ，工程师将它应用在有杂讯的环境里传送数位讯息（例如在轨道卫星通讯里） 。
• Through the approximate handling of geomagnetic intensity and differential riccati equation , the magnetic attitude h control law of the microsatellite in a circle orbit which has external disturb and the structural perturbation is presented
  通过对卫星地磁场和微分riccati方程进行近似处理，给出有外界扰动和结构化摄动圆轨道卫星系统的h _磁姿态控制规律。
• Tt china has established an integrated tt network comprising tt ground stations and ships , which has successfully accomplished tt missions for near - earth orbit and geo - stationary orbit satellites , and experimental spacecraft
  航天测控。中国已建成完整的航天测控网，包括陆地测控站和海上测控船，圆满完成了从近地轨道卫星到地球静止轨道卫星、从卫星到试验飞船的航天测控任务。
• The images include those captured by the noaa series of polar - orbiting meteorological satellites noaa - 15 , 16 and 17 operated by the u . s . national oceanic and atmospheric administration and the fengyun - 1 series of satellites fy - 1d operated by the china meteorological administration
  以上极地轨道卫星图像接收自美国国家海洋及大气管理局的noaa卫星系列noaa - 15号16号及17号及中国气象局的风云1号卫星系列风云- 1d 。
• Because of the relative movement between the leo satellites and the terrestrial user terminals , the very high handover rate during a call ’ s lifetime , including inter - spotbeam handover , inter - satellite handover and handover between satellite communication systems and terrestrial ones , will occur
  由于低轨道卫星与地面用户终端之间存在相对运动,会引起切换问题,主要包括波束间切换,卫星间切换,以及卫星通信系统与地面通信系统之间的切换。
• This paper , according to the important theory and key technology of leo satellite communication system , analyzes and studies the control system of the leo satellite ground station at length , and the hardware design and some test work of the system are implemented
  本文结合了低轨道小卫星通信系统的重要理论和关键技术，着重对低轨道小卫星通信的地面站控制系统进行了详细地分析与研究，并且完成了低轨道卫星地面站控制系统的硬件设计和部分测试工作。
• Soon light - weight phones outfitted with high - resolution screen ? which can be embedded in everything from wristwatches to palm - held units ? will be connected to series of low orbit satellites enabling people to talk , send and receive e - mail , or take part in video conferences any time , anywhere
  译文：不久以后，装有高清晰度屏幕的轻型电话? ?这种电话能安装在从手表到手持装置等任何东西上? ?降雨一系列低轨道卫星相连，使人在任何时间和任何地点都能交谈、发送和接收电子邮件或参加电视会议。
• In order to cover the whole earth ’ s surface , telecommunication satellites are arranged in two ways : one is to put three geosynchronous satellites at the geosynchronous orbit ( about 35 , 700km altitude ) . another is to put several tens or several hundreds of satellites at low earth orbit ( about 700km altitude )
  为了能够覆盖整个地球表面,通信卫星通常采用两种方式布置:一种是用三颗地球同步轨道卫星( 35 , 700公里) ,另一种是需要几十至几百颗的低轨道( 700公里)卫星。