加上这三枚新发射的人造卫星，俄罗斯在太空的人造卫星数总数就将达18枚。
They will bring to 18 the total number of satellites mapping Russian territory.
针对具有时间窗口和数传资源限制卫星数传调度问题，提出了基于解构造图模型的蚁群优化算法。
For satellite data transmission scheduling problem (SDTSP) restrained with time Windows and resources, ant colony optimization algorithm based on solution construction graph model is proposed.
在简易机场的另一边，仍有此地与其它地方的联系存在：一座地面接收站正接收着来自于数颗德国地球观测卫星的数据。
Over by the airstrip, there’s further evidence of global reach: a ground station to which various German Earth-observing satellites send down their data.
我们还将对不计其数的卫星编目录。
美国宇航局4月25日提供的一幅卫星图上可以明确看到部分浮油已经进入墨西哥湾。图的下方可以清楚地看到数艘船只。
An April 25, 2010 satellite photo provided by NASA shows a portion of an oil slick in the Gulf of Mexico, with ships visible at bottom left.
将一颗卫星装进一架发射火箭，要耗时6个月以上，但美国空军希望将此时间削减至数天甚或数小时。
Integrating a satellite with a launch rocket can take six months or more, but the US Air Force hopes to reduce this to days or even hours.
用四元数方法建立起卫星动力学方程和运动学方程。
The satellite dynamics equation and kinematic equations are built with the method of quaternion.
提出了一种适用于装备有星际链路的低轨卫星星座网的切换策略——最小跳数切换策略。
This paper proposes a new handover strategy named minimal-hops handover (MHH) strategy for the LEO satellite constellations equipped with inter-satellite link (ISL).
基于高斯摄动方程，推导了卫星在同时考虑J2和大气摄动情况下的轨道根数变化方程。
The variation equation of the satellite orbit elements under both J2 and drag perturbations was derived based on the Gauss perturbation equation.
为了实现船载天线与同步通讯卫星的通讯，根据坐标变换原理和实际使用要求，提出了数引闭环、电平开环的跟踪方法。
In order to achieve the communication between the ship board antenna and the synchronous communication satellite, a method by the digital guiding closed loop and level open loop tracker is presented.
介绍一种利用GPS卫星接收机接收的时间信号，经单片机接收处理后进行自动校时的数显时钟的设计。
The author introduces the design of digital display clock, the time signal received by GPS satellite receiver corrects time automatically after receiving and processing by single chip computer.
研究了地球磁场对带电的非赤道卫星的轨道根数的摄动影响。
The perturbation effect of the earths magnetic field on the orbital elements of a charged satellite is further studied.
数周之后，第二颗人造卫星发射了。
研究了在高空电离层中运动的带电荷的卫星受电感应阻力后对轨道根数产生的摄动影响。
The influences of the electronic induction drag on the variation of the orbital elements of a charged satellite moving in a magnetic-field-free ionosphere are studied.
导航卫星一般采用近圆轨道，当卫星轨道偏心率或者轨道倾角接近于零时，利用GPS卫星开普勒轨道根数拟合卫星广播星历会出现一些问题。
When their orbit eccentricity or inclination are near zero, some problems may occur when the GPS Kepler orbit elements fitting method is applied to fit their broadcast ephemeris parameters.
卫星通信的信息量越来越大，数据的速率越来越高，使得卫星高速数传系统的功率和带宽资源日益宝贵。
With the fast increasing information capacity and data rate requirement, the resource of power and bandwidth within satellite high data rate transmissions is becoming more and more tight.
基于相对轨道根数法，根据卫星相对运动方程，提出了“自然队形”的概念及队形设计的一般方法，并给出了具体的例子。
A concept of natural formation and a general RT design method are proposed based on the relative Orbital Element method and the relative motion equation in this paper. An example is given.
轨道会渐渐衰减，这是因为卫星与为数甚少的空气分子之间相互碰撞所致。即使是在通常被划归为“外太空”的高度上也还找的到这些分子。
Orbits gradually decay as a result of collisions with the small number of air molecules found even at altitudes normally classified as "outer space".
轨道会渐渐衰减，这是因为卫星与为数甚少的空气分子之间相互碰撞所致。即使是在通常被划归为“外太空”的高度上也还找的到这些分子。
Orbits gradually decay as a result of collisions with the small number of air molecules found even at altitudes normally classified as "outer space".
应用推荐