near-earth orbit

D. Can keep clear of the other object near its orbit.

能够清除其轨道四周的其它物体.

A new method for measuring near-earth orbit ballistic parameters of multi, faint, small and dim targets is proposed on the basis of analysis and demonstration of sensor selection for multi-target detection, target extraction and data processing.

在对多目标探测所用传感器的选择、目标提取和数据处理等三方面技术问题进行分析论证的基础上，提出了一种新的多、弱、小、暗目标近地弹道参数测量方法。

Satellite Formation Establishing in Near Circular Orbit

近圆轨道卫星编队捕获技术研究

The space experiments are carried out in the chinese sixteenth scientific and technological exploration satellite. The satellite was flew around the near-earth orbit about 15 days.

空间实验是在我国第16颗科学探测与技术试验卫星上进行的，卫星在近地轨道运行15天。

For the expansive flows with tracing property, this paper is to show that the topological dynamical property near by the periodic orbit is the same as that of the hyperbolic periodic orbit.

证明了具有跟踪性的可扩流在其周期轨附近的拓扑动力性质与双曲周期轨相同。

Space debris will make available space in the outer space more and more crowded. In particular, the pollution of near-earth orbit space will increase the accident rate in the outer space.

空间碎片会使外空可利用空间越来越拥挤，尤其对于近地轨道空间的污染，会加大外空事故率。

As a hot spot on the research of space navigation in recent years, X-ray Pulsar-based Navigation ( XPNAV) can offer abundant navigation information, such as position, velocity, attitude and time etc. for the spacecrafts in near-Earth orbit, deep space and interplanetary space.

X射线脉冲星导航（X-ray Pulsar-based Navigation，XPNAV）是近几年空间导航领域研究的热点，可为近地轨道、深空及星际空间飞行的航天器提供位置、速度、姿态和时间等全面的导航信息。

By using the closed orbit theory, the photodetachment cross section of H-near a metal surface is derived and calculated.

利用闭合轨道理论，我们推导和计算了H-在金属面附近的光剥离截面。

Near-field autonomous rendezvous orbit design problem is discussed by adopting CW equation in the paper.

采用CW方程研究了空间飞行器近程自主交会轨道设计问题.

The property can offer position, velocity, and accurate time navigation information for the spacecrafts in near-earth orbit, geostationary orbit, elliptic orbit or interplanetary orbit.

这一特性使其能够为近地轨道、地球同步轨道、大椭圆地球轨道、地月轨道及星际空间飞行的航天器提供位置、速度和时间等丰富的导航信息。

Systems analyzed on the design principle of near-earth orbit, regression orbit, stationary orbit, critical orbit and construction orbit. Base on this, a orbit design model is given.

系统研究了近地轨道、太阳同步轨道、回归轨道、静止轨道、临界和冻结轨道的设计原理，在此基础上，建立了轨道设计模型。

TT monitoring: 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。

Even its visibility from near-earth orbit is questionable.

甚至从近地球轨道其可见度是值得怀疑的.

In this paper we did research on the heat flow, temperature, structural changes, and their influencing factors of parabolic satellite antenna in near-earth orbit, which provides future theoretical references for antenna thermal and structural design.

本文以抛物面型星载天线为研究对象，分析其在近地轨运行时的外热流、温度场和结构场的变化情况和影响因素，为天线的热设计和结构设计提供理论依据。

Calculation Method of a Kind of Near-round Repeating Satellite Orbit Using Nadir Points

一类由星下点反算卫星近圆回归轨道的方法