查询词典 orbit calculation

In order to provide orbit completion for Chinese lunar explore project, it was founded the lunar satellite orbit determination model and software by us.

为了对中国月球探测工程的提供轨道计算支持，我们研究建立了自己的月球卫星轨道确定模型和软件。

The project of orbit determination in this paper is applied to two study projects. The method of orbit determination and the results achieve the de mands of the projects.

本文的定轨方案在两项预研研究课题中得到了应用，其定轨方法和实际的计算结果达到了课题要求。

The Earth has its own space in the orbit,that is the warm period and ice period orbit.

地球在运行轨道上有自己的运行空间，即温暖期运行轨道和冰河期运行轨道。

A satellite is an object,either natural or man-made,which travels in an orbit round another orbit in space.

卫星无论是自然存在的，还是人造的，都在宇宙中沿着一个轨道绕着另一个星体运行。

The errors and area limits caused by the lunar curvature were avoided in this model established under the Selenocentric Orthogonal Coordinate System, the accidental errors of exterior line elements were reduced by orbit fitting and interpolation, the polynomial orders of systematic errors in satellite orbits were decreased with their expression in the flying coordinate system moving and rotating with satellites, and the reliability of exterior orientation solution was enhanced under the condition of sparse and low accuracy control points by appending constraint of orbit and attitude parameters.

该模型通过在月心直角坐标系进行影像空中三角测量来消除月球曲率引起的误差和测图范围限制，通过轨道形状的拟合与插值来减小摄影时刻轨道位置的偶然误差，在飞行坐标系中建立轨道修正模型来减少定向参数的数目，对轨道和姿态增加约束条件来提高月面控制点数目稀少及精度低条件下外方位解算的精度与可靠性。

The motion of deep space probe is usually divided into three stages: parking orbit near Earth, transfer orbit toward the targe...

深空探测器的运动通常分为三个阶段：近地停泊轨道，飞向目标天体的过渡轨道和环目标天体的运行轨道，相当于目标天体的卫星。

Periodic Orbit: An orbit which closes on itself.

周期轨道：一个轨道上依靠自己的休息。

Finally, for resolving the waiting problem of the OGY method, we suggest a"middle"periodic orbit method to guide the controlled orbit to close in on the target as soon as possible.

最后，为了改善OGY方法在控制实施前需要等待较常时间的缺陷，我们还提出了"中间周期轨"方法，来引导受控轨道尽快进入目标轨道附近。

The analytical method is always used due to the large amount of the objects and not very high accuracy of forecasting. A method based on the position and velocity derived from the mean orbit elements directly is given, which is to avoid the problem of singularity in calculating the periodic terms of orbit elements variation, thus the process and software can be simplified.

在已有分析法得到t时刻平均根数的基础上给出一种轨道预报方法，由t时刻的平均根数给出该时刻卫星的位置和速度，在此基础上将地球非球形引力摄动的周期项直接用卫星直角坐标的位置和速度分量表示，这样可以避免在计算轨道根数变化的周期项时出现的奇点问题，从而对根数的选择无特殊要求，可适用于各种轨道，简化预报程序和相应的软件，提高预报效率。

The orbit of double-side grinding was analyzed,the orbit equation of point p in wheel to wafer was inferred.

分析了硅片双面磨削的运动轨迹，并给出了砂轮上P点相对于硅片的运动轨迹。

It's bell can reach over a meter in diameter.

它的身体最大可以达到直径1米多。

Now they are overdue and I shall have to pay a fine.

现在他们过期了，我不得不付罚款。