Low Earth orbit

the rerouting strategy in the low earth orbit ( leo) quality of service ( qos) satellite networks was proposed to accommodate as much qos traffic as possible.

提出在低轨（LEO）服务质量（QoS）卫星网络中使用重路由策略容纳尽可能多的QoS业务。

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the application of perturbing fit function in low earth orbit satellite determination

拟合摄动力函数在低轨卫星定轨算法中的应用

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In the 1990s, Orbital Sciences Corp. ( now Orbital ATK) began releasing rockets from the belly of a converted L-1011 airliner to put small satellites into low Earth orbit.

上世纪90年代，轨道科学公司（现为轨道ATK公司）从一架改装的L-1011客机的机身下发射火箭，将小型卫星送入近地轨道。

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nasa is also looking beyond the iss, beyond low earth orbit, to more distant destinations in space.

美国航天局还在寻找超越国际空间站、超越地球低轨道以外的更遥远的太空目的地。

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atmospheric drag is the main perturbation force on a low earth orbit satellite and is closely related to the variation of high atmospheric density.

大气阻力是低轨卫星主要的摄动力，与高层大气密度的变化密切相关。

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the results show that it is feasible to implement quantum key distribution between a ground station and a satellite in a low earth orbit and that it is the detector dark noise and the space optical environment that limit the link distance for free-space quantum key distribution.

结果表明，在低轨卫星地面站间进行量子密钥分配是可行的，限制自由空间量子密钥分配链路距离的主要因素是探测器暗噪声和空间光学环境。

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the optimization methods for launch trajectory of low earth orbit are discussed, and the optimal control problems are converted into parameter optimization problems by multiple parameterized methods.

确定了近地轨道的发射轨道优化设计方法，采用多重参数化法将轨迹最优控制问题转化为参数优化问题。

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the new plan encourages firms to compete to provide transport to low earth orbit ( leo).

新计划鼓励私人公司通过竞争来提供近地轨道的运输服务。

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A manned ShenZhou-11 capsule is set to launch in October, carrying two astronauts, to rendezvous and dock with the TianGong-2 space station precursor facility in low Earth orbit.

载人神舟11船舱将在十月发射，搭载两名宇航员，会合，并在地球低轨道的天宫二号空间站前体设施对接。

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research on routing policies for low earth orbit satellite communication system with intersatellite links

具有星际链路的低轨卫星通信系统的路由策略研究

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the study shows that the background light is one of the main factors that limit the link distance for free-space quantum key distribution, and that it is feasible to implement quantum key distribution between a ground station and a satellite in a low earth orbit.

研究表明，背景光是限制自由空间量子密钥分配链路距离的主要因素之一，在低轨卫星-地面站间进行量子密钥分配是可行的。

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and after liftoff, the core module will be deployed in a low earth orbit.

升空后，核心舱将被部署在近地轨道。

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this work examines the effects on polymer and composites properties induced by atomic oxygen exposure in the space low earth orbit environment.

文章阐述了空间低地球轨道环境中原子氧对聚合物及其复合材料性能的影响；

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Pegasus is the first air launched solid rocket in America, which is used to place small satellites into low earth orbit.

飞马座火箭是美国第1种机载空中发射型固体运载火箭，主要用于将小型卫星送入近地轨道。

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indeed, low earth orbit is well within the ionosphere, a major part of our atmosphere.

实际上，近地轨道基本被电离层覆盖。而电离层是大气的重要组成部分。

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They're primarily designed for Low Earth Orbit ( LEO)-an easily accessible region of space from around 200 to 800 miles above Earth, where human-tended missions like the Hubble Space Telescope and the International Space Station ( ISS) hang out.

它们主要是为近地轨道而设计的——近地轨道是距离地球200至800英里的一个较为容易进入的空域，像哈勃太空望远镜和国际空间站这样需要人类维护的太空设施就在这里运行。

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another category captures a double coincidence such as both venus and an airplane simultaneously silhouetted, or venus and the international space station in low earth orbit.

另一种则是同时拍到两个凌日的物体，比如金星与恰好经过的飞机，或者是金星与低空轨道上的国际空间站；

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this paper makes an undated assessment of the technical and economic feasibility of transferring satellites from low earth orbit to geostationary orbit using low thrust propulsion.

本文对利用低推力推进装置将卫星从低地轨道转移到静地轨道的可行性在技术上和经济上重新作了评价。

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a numerical evaluation of reactive probabilities of atomic oxygen with graphite in low earth orbit

原子氧和石墨在近地轨道环境中反应概率的数值估算

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using laser instead of chemical energy in conventional rockets, a laser propulsion vehicle can get into low earth orbit with higher payload ratio, less cost and more safety.

采用激光代替传统火箭的化学能，激光推进飞行器能够以高载荷比、低成本、安全的方式将有效载荷送入近地轨道。

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based on the regular and predictable features of topology changes in low earth orbit ( leo) satellite networks, a dynamic source routing algorithm, namely adaptive route-selection ( ars) algorithm, was presented for leo satellite networks.

针对低轨（LEO）卫星网络拓扑变化有规律、可预知的特点，提出了一种适于LEO卫星网络的动态源路由算法，即自适应路由选择（ARS）算法。

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for the first time since apollo 17 returned from the moon in 1972, nasa is scheduled to loft an astronaut capsule on thursday to soar beyond low earth orbit.

美国航空航天局（NASA）预定本周四把一个可以载人的太空舱发射到低地轨道之外的地方，这还是1972年阿波罗17号从月球返回之后的第一次。

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atomic oxygen in a low earth orbit is very active in chemical reactions, and it can oxidate copper.

低地球轨道的原子氧化学性能非常活泼，能使金属铜氧化。

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the precision of hanging dynamic model based on cw equation was analyzed in detail, and a low earth orbit satellite octahedron configuration was simulated for validation.

对基于C-W方程的悬停动力学模型进行了精度分析，最后以低轨道航天器的八面体编队构型为例进行了数学仿真验证。

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nasa shuttles stay in low earth orbit, which is generally about a hundred and seventy miles above the earth's surface.

美航局的飞机飞行时，一般保持在近地轨道上，即距离地表一百七十英里的地方。

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scientists launched a new low earth orbit satellite.

科学家发射了一颗新的低地球轨道卫星。

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astronauts can spot the great wall from low earth orbit, along with plenty of other things like the giza pyramids and even airport runways.

宇航员可以在近地轨道上看见长城，同时还能看见其他很多建筑，比如吉萨的金字塔，甚至还有飞机跑道。

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nasa retired the shuttle fleet last year to focus on developing the next generation of spacecraft that will travel beyond low earth orbit.

去年，美国航空航天局让所有航天飞机退役，集中发展下一代能绕地球低轨道飞行的太空船。

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with the enhancement of the space militarization, it is necessary to know the present low earth orbit satellites.

随着太空军事化趋势的日益增强，了解和认识当前的低轨道卫星较为必要。

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nasa uses low earth orbit mobile data communications for satellites.

美国国家航空航天局使用低地球轨道移动数据通信为卫星服务。

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