美国正在进行通过激光进行卫星对卫星通信的试验，它可以携带更多的数据，并且与无线电波相比不大容易受到干扰。
America is experimenting with satellite-to-satellite communication by laser, which can carry more data and is less prone to interference than radio waves.
美国宇航局的纳米卫星教育发射计划为教育团体和科学任务提供免费发射卫星的机会，其现在也对非营利性公司开放。
The NASA Educational Launch of Nano Satellite program, which offers free launches for educational groups and science missions, is now open to nonprofit corporations as well.
随着时间的推移，卫星失去了推进速度，使得地球对卫星的拉力大于把卫星推离地球的力。
As time goes by, the satellite loses its speed, which makes the force pulling it towards the earth stronger than the force pulling it away.
一些物体，比如一些旧的太空火箭或卫星碎片，在地球上以非常高的速度运动，速度如此之快，以至于一个非常小的碎片都能破坏重要的卫星或对宇航员造成危险。
Objects, like bits of old space rockets or satellites, move around the planet at very high speeds, so fast that even a very small piece can break important satellites or become dangerous to astronauts.
借此良机，NASA(美国航天航空局)的研究人员已经分析了其Aura和Terra卫星获取的数据。Aura和Terra卫星可以显示关键污染物对奥运限制措施的反应。
Taking advantage of the opportunity, NASA researchers have since analyzed data from NASA's Aura and Terra satellites that show how key pollutants responded to the Olympic restrictions.
四百年前，当伽利略将自制的天文望远镜对向夜空时，他发现了木星的四个卫星，从而证实其它行星也会有自己的卫星。
Four hundred years ago, Galileo raised his homemade spyglass to the sky and spotted four of Jupiter's moons, revealing that other planets could have their own lunar companions.
大部分军事应答者说，新的军事卫星的发射将不影响其对商业通信卫星的使用。
For the military respondents, most said the launch of new military satellites will not impact their use of commercial communications satellites.
对太空目标的准确而及时地信息对于保护卫星很重要，同样对攻击卫星也是必要的。
Accurate and timely information on space objects is vital for defending a satellite, but also necessary for attacking one.
印度在2008年将一颗卫星发射至月球轨道，不过在一年后，由于卫星通讯突然中断，科学家失去了对其控制而不得不将之抛弃。
India launched a satellite into moon orbit in 2008, but had to abandon it nearly a year later after communication links snapped and scientists lost control of it.
其中之一是将小卫星发射到低地球轨道构成卫星星座，以便能提供对目标的持续覆盖。
One calls for launching microsatellites into low Earth orbit in constellations that would provide continuous target coverage.
2009年，对松岛冰川进行了一次卫星测量研究，这是在南极洲最大卫星测量之一，显示冰面正以每年16米的速度下降。
In 2009, a study of satellite measurements of Pine Island Glacier, which is one of the largest in Antarctica, revealed the surface of the ice was falling at a rate of up to 16m a year.
与先进极高频通信卫星和转型通信卫星计划不同，WGS提供对干扰和核效应无保护的宽带通信。
Unlike programs like AEHF or T-SAT, however, WGS offers wideband communications that are 'unprotected' against jamming and nuclear effects.
对降雨量的统计来自多卫星降水分析，基于TRMM（ Tropical Rainfall MeasuringMission热带降雨测量任务）卫星的数据。
The rainfall measurements are from the Multisatellite Precipitation Analysis, which is based on data from the Tropical Rainfall Measuring Mission (TRMM) satellite.
卫星天线扫描驱动机构是整个卫星系统的核心部件，对卫星的运行姿态和数据的采集起着至关重要的作用。
The satellite antenna scan drive institution is a core component of the whole satellite system, which has an effect upon the attitude of satellite and gathering data.
通信卫星的频分复用机制，对卫星通信系统的发送信号频谱成型提出了严格的要求。
As frequency divided multiplex access is widely adopted in communication satellite system, strict frequency spectrum limits on modulator is mandated.
首先分析了GPS卫星对特定区域的覆盖情况，然后针对不同位置的GPS卫星失效，考察对GPS导航精度即目标区域GDOP值的影响，并通过仿真予以验证。
Then according to the voidness of GPS satellites in different position, the effect on navigation accuracy of GPS(that is GDOP)is studied. The validity of voidness strategy is proved by simulation.
专家称被摧毁的卫星残骸可能在未来几年年甚至十几年内对太空中的其他卫星造成损害。
Experts said remnants of the destroyed satellite could threaten to damage or destroy other satellites for years or even decades to come.
利用JASON - 1卫星测高数据反演了海洋垂线偏差，分析了垂线偏差对用卫星测高数据建立海平面高模型的影响。
The vertical deflection is inversed from JASON-1 satellite altimetry data, and the effect of vertical deflection correction on the sea surface height is analyzed.
随着低轨卫星的应用领域不断扩大，人们对低轨卫星的轨道精度要求越来越高。
With more and more application fields of Low Earth Orbit satellites, better and better precision of LEO is needed by many people.
对卫星的空间环境以及结构特点的分析结果表明，地球同步静止轨道卫星表面存在静电放电的可能性。
By analyzing the space environment and the structure characteristics of the satellite in GEO, the surfaces of the satellite exists the possible conditions of ESD.
一般的卫星观测任务规划主要是指对卫星有效载荷的优化使用，关注的是数据的采集。
Satellite observing mission planning is usually indicated as the optimization of on-board payload utilization which mainly considers the data collecting procedure.
卫星定位导航是指利用卫星定位导航系统提供的位置、速度及时间信息对各种目标进行定位、导航及监管。
Satellite positioning navigation means using the position, velocity and time information supplied by the satellite positioning navigation system to localize, navigate and manage the target.
GPS卫星位置计算是进行GPS导航定位的关键环节，快速准确地计算出卫星坐标，对提高GPS定位精度和速度有着重要意义。
GPS satellite position calculation is the key link of GPS navigation and positioning, calculating satellite coordinates quickly and accurately is important to improve positioning speed and precision.
为了提高卫星总体设计质量，对基于不确定性多学科设计优化(UMDO)的卫星总体设计方法进行研究。
To enhance satellite system design quality, the satellite system design based on Uncertainty Multidisciplinary design Optimization (UMDO) is studied in this paper.
卫星遥感器绝对辐射定标系数的有效性检验，是对卫星遥感精度进行全面评价的最有效手段之一。
It's one of the most available means of general satellite remote sensing accuracy assessment to validate the absolute calibration coefficients of the satellite-based sensor.
为实现卫星网络的互联互通，需对卫星网络进行有效、合理和可靠的路由控制。
In order to realize the connectivity and communication of satellite networks, it's necessary to carry out through effective, reasonable and reliable routing control.
本课题在业务信道和终端两个方面实现了对卫星会议电视系统的网络管理，对新体制卫星网上的会议电视网管系统进行了探索性的研究。
The paper takes a groping research on the satellite videoconference network management system based on a new mechanism, and realizes its management on both service channel and terminal.
本课题在业务信道和终端两个方面实现了对卫星会议电视系统的网络管理，对新体制卫星网上的会议电视网管系统进行了探索性的研究。
The paper takes a groping research on the satellite videoconference network management system based on a new mechanism, and realizes its management on both service channel and terminal.
应用推荐