我们用圆轨道的概念。
讨论了全球覆盖正交圆轨道星座设计方法。
The design method of the orthogonal circular orbit satellite constellation supporting global coverage is studied.
我们在之后的课程还会讲到椭圆轨道，不过现在我们只讲，圆轨道。
Later in the course, we will cover elliptical orbits, but now let's exclusively talk about circular orbits.
但是，这种算法不能满足线X射线源圆轨道锥束扫描的情况。
However, this algorithm does not apply for circular orbit cone-beam scan with line-focus X-ray source.
这些行星都以太阳为中心以椭圆轨道公转，虽然除了水星的十分接近于圆。
These planets all take sun as center by elliptical orbit revolution, although extremely approaches except Mercury to the circle.
作为另一个例子，地球和月亮的质心就是在一个绕太阳的近似的圆轨道上运行。
As another example the center of mass of the earth and moon moves in an approximately circular orbit around the sun.
研究在地球万有引力场和磁场中的磁性刚体航天器在圆轨道上的混沌姿态运动。
Chaotic attitude motion of a magnetic rigid spacecraft in a circular orbit of the earth is treated.
应用卫星绝大部分都是近圆轨道的卫星 ，其中又有很多是需要进行轨道控制的。
Most of application satellites are running in near circular orbits, and many of them need to be controlled.
在极地圆轨道上工作的对地定向磁控小卫星，其动力学方程是一个线性周期系统。
The magnetic control system for polar orbiting, nadir pointing small satellite is studied in this paper. It is shown that the dynamics with magnetic control system is a linear periodic system.
本文介绍了一种可以对来自于单一圆轨道的锥束投影数据进行精确重建的分析方法。
An analytical method allowing exact reconstruction from cone-beam projection data which are detected from a single circular orbit is discussed.
首先基于二体假设，采用两种方法系统地研究了圆或近圆轨道上卫星编队飞行的相对运动。
Based on the two-body assumption, two methods are used to investigate the relative motion of satellite formation flying on circular or near-circular orbits.
在Dokuchaev的这篇新论文里，他既考虑了光子在内边界的稳定圆轨道，也考虑了球形非赤道面轨道。
In his new paper, Dokuchaev has looked at stable circular orbits as well as spherical, non-equatorial orbits for photons at the inner boundary.
运用卫星低轨道两个主要环境力矩(重力梯度矩和地磁力矩)对圆轨道卫星三轴姿态进行被动控制。
In this paper, three-axis passive stabilization is realized by using two main environment torques (gravity gradient and geomagnetic torque) in low orbit.
这一结果支持了目前无线电掩星定性误差估计研究中通常引入卫星圆轨道假设这个近似处理方法的合理性；
On one hand, this result supports those researchers who are engaged in qualitative error sources analyses are liable to employ circular orbit assumptions;
摘要为了降低“一对多”在轨服务的成本，以共面圆轨道卫星群为研究对象，开展了在轨服务任务规划问题的研究。
Abstract: in order to reduce the cost of on-orbit service, the programming of on-orbit service mission for multiple object spacecraft in coplanar circular orbits was studied.
在传统的星载sar问题的研究中，地球采用球模型，轨道采用圆轨道模型，这给星载sar问题的计算带来了一定的误差。
In the traditional solution to the SAR problems, the earth often adopts circular model and the orbit adopts elliptical model. This often brings error to the calculations.
本文用两次冲量法给出了沿双共切椭圆轨道实现从一圆轨道向另一圆轨道转移的最优方案，并考虑到地球扁率造成的轨道摄动。
The optimal scheme is given for the dual-tangential transfer between two circular orbits by dual impulse method. The orbit perturbation as a result of the Earth's flattening is considered.
本文研究了在共面圆轨道HEO-LEO的过程中，气动辅助轨道转移飞行器（AOTV）在大气内飞行的极小时间控制问题。
This paper considers the minimum-time control of aeroassisted orbital transfer vehicle (AOTV) which arises in the study of coplanar HEO-LEO orbital transfer.
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.
将这些因素作一些小调整，比如多倒一些葡萄酒到杯子里或者在更紧凑的圆轨道上晃动杯子。莱克拉里和同事们掌握了奇异的葡萄酒波形的艺术。
By tweaking these factors a notch—for instance, by pouring a bit more wine into a glass or shaking that glass in tighter circles—Reclari and colleagues mastered the art of unusual wine waves.
你可能知道，地球围绕太阳的轨道形状不像一个完美的圆。
You are probably aware that the earth's orbit around the sun is not shaped like a perfect circle.
在地球的上半部分为夏季的时候，实际上这时的地球离开太阳的距离比在冬季还要远。所以会这样，是由于我们围绕太阳运行的轨道，并不是圆的。
During summer on the top half of Earth, our planet is actually farther from the sun than during winter, a fact owing to our non-circular orbit around the sun.
上个月，在土星轨道上的宇宙飞船卡西尼号拍的这张照片，捕捉到土星著名的卫星中的两个，呈凸圆相位。
A view with two of the more famous moons of Saturn in gibbous phase was captured last month by the robot spacecraft Cassini now orbiting Saturn.
把波函数画成一个圆是有道理的，因为我们知道1s轨道是球对称的。
It makes sense to draw the wave function as a circle, because we do know that 1 s orbitals are spherically symmetric.
这是一个向量场，其中旋转轨道是，以z轴为圆心的圆周，并且这个向量场与每个圆相切。
That is a vector field in which the trajectories are going to be circles centered in the z-axis and our vector field is just going to be tangent to each of these circles.
在星盘上，一个偏心的圆代表了太阳的运行轨道——黄道。
On the astrolabe, an off - centered circle represents the orbit of the sun - the ecliptic.
与对圆参考轨道的C -W方程初始条件进行修正的方法相比，该方法有更高的设计精度。
This method provides better accuracy than approaches that modify the initial conditions of the C-W equations for a circular reference orbit.
针对圆(近圆)轨道航天器相对运动的固定时间状态转移问题，提出了一种基于导航点的多脉冲优化轨迹生成策略。
An optimal trajectory generation strategy based on way-points is presented to solve the fixed-time state transition for spacecraft relative motion in a circular orbit.
一方面，他是椭圆的，但是其他行星的轨道都是接近圆的。
一方面，他是椭圆的，但是其他行星的轨道都是接近圆的。
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