perigee

Once the satellite reaches perigee , it will eject a small probe which enter the planet 's atmosphere .

当人造卫星达到近地点时，就会发射一根小探针，这根探针将进入行星的大气层。

This paper offers a method which maintain orbital shape and perigee location .

本文提供一种保持轨道形状和近地点位置不变的控制方法。

The Test of Dynamic Balance for Perigee Kick Solid Rocket Motor

近地点变轨固体火箭发动机动平衡试验

Mean Density Scale Heights From Analysis of Variation in Perigee Height of China Second Satellite

从我国第二颗卫星近地点高度变化的分析测定平均密度标高

The Moon reaches its absolute perigee once a year .

月球每年有一次达到它的绝对近地点。

Energy Balance Equation at Perigee and Apogee of Satellite Orbit

卫星轨道近地点和远地点能量平衡式

Design Calculation and Optimization Adjustment for Perigee Sensitivity of Radar Altimeter under Various Geographical Physiognomy Conditions

不同地貌条件下雷达高度表近地点灵敏度设计计算及优化调整

Altitude performance prediction of perigee kick motor nozzle

近地点变轨发动机高空喷管性能预示研究

The function and meaning of space solar X-ray telescope in perigee environment space observation were put forward in this paper .

阐述了空间太阳X射线成像望远镜（SXT）在近地环境空间天气观测中的作用和意义。

Now we want to know what the situation is with perigee and with apogee .

现在我们要看看，近地点和远地点的情况。

Compared with perigee orbit spaceflight technology , the task to accomplish deep space exploration is more challengeable .

与近地轨道航天技术相比，要完成深空探测航天任务更具挑战性。

When perigee and perihelion coincide tidal range is at its greatest .

当月球与地球到达它们的近地点和近日点的时间恰好重合时，就会引起最大的潮汐。

Argument of perigee of satellite orbit

卫星轨道近地点幅角

If this is an ellipse around the Earth , then this would be perigee and this would be apogee .

如果这是一个围绕，地球的椭圆形轨道，那么这是近地点，这是远地点。

In this paper , variations of AE-D 's perigee altitudes , the corresponding atmospheric expansion and the density distributions are analyzed .

本文分析了AED极轨卫星近地点的变化及其相应的大气膨胀和密度分布情况。

The maximum error of rectified number of sun and moon appears only when the sun and the moon run near perigee at the same time .

日月改正数误差最值仅出现在太阳和月亮同时运行至近地点附近时。

In addition , the locus of perigee and lunar impact points are given and the characteristic of the locus with variation of the transfer time are discussed .

给出了这些转移轨道的近地点和着月点的轨迹，并讨论了轨迹随飞行时间变化的特性。

The shape and perigee of artificial satellite orbits shall continually variate due to caused by the atmospherical drag and the earth gravity .

人造地球卫星的轨道由于大气阻力和地球引力场等因素的摄动，其形状和近地点位置将不断改变。

Coincidentally , it will also have reached the point in its orbit that is closest to the Earth , known as ' perigee ' .

巧合的是，最大圆月也将到达到距地球最近距离、即人们所知的近地点。

Moreover , out-plane inclination maneuver should be completed at perigee or apogee to influence right ascension of ascending node the least .

另外，平面外倾角调整应尽可能在近地点和远地点完成，以使对升交点赤经的影响最小。

We know the period , we know where apogee is , we know where perigee is , - we know the orbital period & anything we want to know .

知道周期，知道远地点，和近地点在哪里，知道轨道周期-，知道了想知道的一切。

In order to guarantee the characteristics of frozen orbit , in-plane orbit control needs to adjust the semi-major axis , eccentricity , argument of perigee simultaneously .

为了保证冻结轨道的冻结特性，平面内轨道控制需要对半长轴、偏心率和近地点幅角都控制。

The probe entered the earth-moon transfer orbit as scheduled , with a perigee of 200 kilometers and apogee of 380,000 kilometers .

嫦娥三号已经按照计划进入了近地点高度200公里、远地点高度约38万公里的地月转移轨道。

It also occurred when the New Moon was near Perigee , the closest point to Earth in the Moon 's elliptical orbit , making the Moon near its largest apparent size .

同时，新月正好处于近日点附近，也就是月球轨道上离地球最近的一点，又使得月亮的视尺寸接近最大。

Then space target environment are analyzed , including scatter cross section , cycle distribution , inclination distribution , eccentricity distribution , perigee altitude , apogee altitude , and Semi-major axis .

接着重点对空间目标环境进行了分析，从散射截面积、周期分布、偏心率分布、倾角分布、近地点远地点高度和半长轴等多个方面进行了归纳总结。

The theory derivation for in-plane maneuver on semimajor axis , eccentricity and perigee argument and out-plane maneuver on orbit inclination was presented in this paper .

针对中低轨道卫星，对平面内卫星半长轴a、偏心率e和近地点幅角ω联合调整，以及平面外轨道倾角调整等进行了理论推导。

You now have the ecliptic longitude of perigee of the sun for the mean summer solstice of your chosen year ( and effectively for the entire year ) .

你现在有黄道经度的近地点的阳光平均夏季冬至，你选择了一年（而有效地为整个一年）。

It is pointed out after detailed discussion that it is feasible for perigee burus to adopt semi-analytical method , for apogee burn to adopt analytical method in order to save computation time .

本文经过论证指出，可以在近地点点火段采用半解析法，在远地点点火段采用解析法，从而可以节省大量计算时间。

A The ellipse has a semimajor axis A , - 2a perigee to apogee & is2a .

椭圆轨道半长轴为，近地点到远地点。

The relation of the right ascension and argument of perigee of the required orbit with the lunar position is derived within one lunar month . Based on this relationship the launch opportunity and launch window are discussed .

文章分析了月球在一个恒星月内位置变化与相应的地月转移轨道升交点赤经和近地点幅角变化的关系，在这个基础上讨论了发射机会和发射窗口问题。