轨道高度

研究了星载SAR多普勒调频率随轨道高度的变化和地球自转对同步轨道SAR和低轨SAR调频率的影响；

The change of spaceborne SAR Doppler frequency rate with the orbit altitude , as well as the influence of earth rotation on the Doppler frequency rate of LEO SAR and that of GEO SAR are studied .

电离层掩星观测中，当低轨卫星（LEO）轨道高度较低时，轨道以上的电离层电子总含量（TEC）对掩星反演的影响不能忽略。

When the low-Earth orbit ( LEO ) satellite is low , the contribution of the Total Electron Contents ( TEC ) above the satellite is not neglectable for inversion of GPS-LEO ionospheric occultation .

对于轨道高度约400km的CHAMP掩星模拟数据，外推方法误差较大，改正TEC方法反演结果与模式值相符得较好。

For CHAMP , the errors of extrapolate method are large , and inversion profiles of the calibrated TEC method are consistent with the model values .

最后给出了一个轨道高度750～800km，卫星太阳同步轨道、冻结轨道和回归轨道的算例。

At last , an example of design for sun-synchronous , frozen and return orbit in the orbit of some satellite which altitude was 750 to 800 km was given .

针对空间目标飞行速度快、轨道高度高、真假目标伴随运行等的特点，空间探测相控阵雷达（SSPA）应该具有作用距离远、测量精度高的特点，并具有相应的多目标识别能力。

Targets in space are characterized by fast flying velocity , high orbit and usually traveling with false targets . Accordingly , a Space Surveillance Phased Array ( SSPA ) radar should have a far instrumentation range , high measurement precision and the ability to identify multiple targets .

卫-卫跟踪测量模式中轨道高度的优化选取

Optimal design of orbital altitude in satellite-to-satellite tracking model

数字式铁路轨道高度差检测仪的研制

An Instrument for Checking Level Difference of Raiway Tracks

对中巴地球资源卫星标称轨道高度进行了讨论，提出了修正。

The article discusses the nominal orbital altitude of CBERS and some correction is brought up .

特别是在月球上，轨道高度还会影响到探测器的寿命。

Especially , around the moon , orbital altitude will also affect lifetime of the probe .

关于中巴地球资源卫星轨道高度的管见

An opinion of CBERS orbital altitude

空间站轨道高度选择

Space station orbit altitude selection

随着地球不断变大，月亮会像那些卫星一样轨道高度越转越低。

As the Earth grows , the Moon would , like all our satellites , gradually spiral inward .

到那时，大多数卫星都已经随着轨道高度的衰减而落回地球。

By then , many of our satellites will have fallen back to Earth as their orbits decayed .

羽流试验系统能准确模拟并测量100公里轨道高度发动机羽流场的特征参数。

The test system can correctly simulate and measure the plume flowfield parameter as the thruster firing in the orbit of 100 kilometers .

研究了通过遗传算法模型优化设计侦察卫星轨道高度、轨道倾角、右升交点角及平近点角等轨道参数的方法。

Through the GA model , the orbital elements of each satellite such as altitude , inclination , RAAN and mean anomaly are optimized .

模型表明，影响舱内剂量水平的主要因素是轨道高度，呈二次曲线形式；

The model indicates that the dose level in cabin is affected mainly by orbit altitude , with a quadratic curve in this model .

采用角反射器衍射光学理论与采用传统理论所得的卫星角反射器补偿角之间存在差异，这种差异随着轨道高度的不同而发生变化。

Dihedral angle offsets are different between theory in this paper and traditional theory . Meanwhile , the difference is variable at different orbital height .

它的轨道高度低，路径损耗小，收，发信功率低；通信延迟小；

The advantages contains : low height of the orbit , small path loss , low power of transmitter and receiver , low delay , low cost .

据信该卫星是在530英里轨道高度，西昌以西4度的地点飞行。

The attack is believe to have occurred as the weather satellite flew at 530 mi . altitude 4 deg. west of Xichang located in Sichuan province .

然后基于该模型，分别改变轨道高度和轨道倾角，就不同星座的网络综合连通度如何变化进行了仿真计算和分析。

Using the model , simulation and analysis for variation of network comprehensive connectivity are performed in different constellations , altering orbital height and orbital inclination respectively .

不仅是地面（以及大气）在朝他们扑来，不断增大的引力也在使空间站的轨道高度不断下降。

Not only would the ground ( and atmosphere ) be rising toward them , but the increased gravity would also cause their orbit to slowly shrink .

当光学系统口径一定时，在相同的轨道高度条件下，增大焦距可以提高地面分辨率，增大系统的视场角可以扩大对地面的覆盖宽度。

When the aperture diameter of an optical system is fixed with the same orbit height , the resolution of ground objects can be improved by increasing the focal length .

由于轨道高度非常低，在进行高分辨率对地遥感观察时，可以显著降低有效载荷的重量和功耗，就算采用普通分辨率观察设备也能实现高分辨率观察。

When observed during high-resolution remote sensing . Can significantly reduce the payload weight and power consumption . Even the ordinary resolution of observation equipment will be able to achieve high-resolution observation .

结合铁路轨道高度差检测仪的研制，介绍了其基本结构和信号采样原理，以及信号处理和显示的方法。

With the development of an instrument for checking the level difference of railway tracks , the measures of its basic structure , signal sampling , signal processing and display are introduced .

同时，在给定系统一定初始条件的情况下，利用该跟踪规律分别推出了用户星最大跟踪角度和角速度与用户星轨道高度和用户星轨道倾角之间的关系。

At the same time , the relationships of the maximum tracking angle and tracking angular velocity to the user satellite 's orbit altitude and orbit inclination are acquired using the tracking laws .

根据目标飞行器轨道高度和追踪飞行器入轨轨道高度，给出了目标飞行器交会对接轨道初始相位的设计方法。

According to the target spacecraft ′ s orbit height and the chaser spacecraft ′ s orbit height , the design method of the target ′ s initial phase for the rendezvous orbit was presented .

其中，由于低轨卫星移动通信系统的卫星轨道高度低，具有通信时延短，链路损耗小、组网灵活等特点，发展前景非常广阔。

Among kinds of satellite communication systems , the LEO satellite communication system has very wide prosperity because its orbit is low and it has less communication delay , less path loss and flexible network organization .

这种碰撞主要发生在450～500kin的高度范围内（空间站高度），碰撞与否还取决于轨道高度和离心率。

This collision generated on the altitude range 450 to 500 km ( space station altitude ) is shown to be extremely dependent on the altitude and eccentricity of the orbit in which the collision occurred .

要想不从太空掉回来，你必须要绕地球飞得足够快。要想保持在绕地轨道的高度你需要达到每秒8千米的速度。

To avoid falling back into the atmosphere , you have to go sideways really , really fast . The speed you need to stay in orbit is about8 kilometers per second .

利用STK软件的输出数据，分析并仿真了不同轨道倾角和高度卫星的太阳帆板和本体外表面的温度特性。

By using the output data of the STK software , the temperature characteristics of the solar panels of the satellites at different inclinations and altitudes are analyzed and simulated .