查询词典 satellite

For purpose of global satellite communications,LEO satellite communication constellation and MEO satellite communication constellation are analyzed and simulated.

1引言随着中国融入世界经济贸易全球化趋势的进一步深化，建立全球范围的通信能力成为我国需要解决的全球性战略问题之一。

After analysis of several existed satellite communication systems,a LEO/MEO satellite constellation connected by optical links and the Lagrange Relaxation Based Double-layered Satellite Routing Algorithm has been proposed.

在分析传统多层卫星网络路由算法的基础上，提出了一种基于空间光链路传输的双层卫星网络结构及其相应的基于拉格朗日松弛算法的LDSR算法。

The synchronous satellite is used to support some small bussinesses in the time with low business amount which nonsynchronous satellite can not cover like late at night and small hours,thus to insure the requirement of satellite communication of China with low investment cost.

本发明公开了一种中国综合卫星通信系统，它是由同步卫星和若干个非同步卫星构成，所述的非同步卫星是由中轨卫星或椭圆轨道卫星星座组成，具有区域性和时限性，即非同步卫星采用只在每天业务高峰期覆盖我国的时限区域性星座，在非同步卫星不能覆盖的低业务量时段如深夜和凌晨，可由同步卫星来支持这些小的业务量。

At first, using the gravitation mode the article confirms the range of Xi'an district, then the article carries on the analysis of the distance optimizing, economic linking, perimeter urban industry basic and water resources protection, then propose " a pair of axis "and" a pair of level " mode, and establish the xi'an satellite city, they are Xianyang, Lintong, Changan, Yanliang, Gaoling, Huxian, Xingping , Liquan , Jingyang , Sanyuan , Qianxian. Then on the basis of analyzing the industry shift of Xi'an, he article confirm the function of every satellite city; At the same time point out the study and adjust of Xi'an satellite city should be strengthened, and strengthen the industrialization construction of the infrastructure, then propose to build one pair of rings structure of traffic facilities.

文章首先应用引力模式确定西安都市区范围，继尔经过优化距离分析、经济联系紧密度分析、周边城镇产业基础分析及水资源保护限制分析后，提出了&双轴线、双层次&发展布局模式，确立了西安包括咸阳、临潼、高陵、户县、兴平、礼泉、泾阳、三原、乾县、阎良、长安十一个卫星城；继而在分析西安市产业梯次转移的基础上，确定了各卫星城的职能；同时指出要加强西安卫星城基础设施发展的研究及调控，要加强基础设施产业化建设，提出建设交通设施的双环结构。

Moreover, by using passive thermal control to make satellite device operate properly under safe temperature; by hypothesizing different satellite changing elements such as inclination, height and spin speed to calculate the temperature changing situation between inside and outside and providing satellite temperature reference for different missions demanding in the future.

并以被动式热控技术，使卫星内元件能在安全温度下正当运作。并假设卫星不同高度及卫星的自旋速度的因素，计算卫星的内外表面温度变化情形，以提供日后不同任务需求，对卫星温度的参考。

When the disturbing potential of 1m2/s2 accuracy, or the approximate velocity of accuracy less 2mm/s in the formula of the rotation of the gravity potential is required, the satellite orbit data not satisfied the potential rotation computing demand are rejected from the GFZs Rapid Science Orbit and TUMs ReducedDynamic Orbit. If the disturbing potential is desired 05m2/s2 at satellite track, the satellite velocity required in formula of the rotation of the gravity potential should be recomputed or the GFZs Postprocessed Science Orbit is adopted.

当要求在卫星轨迹处获得1m2/s2精度的扰动位时，也即要求位旋转效应公式中卫星速度的近似精度小于2mm/s时，GFZ的快速科学轨道、TUM的约化动力法轨道只需要剔除那些速度精度不满足要求的卫星轨迹点；当要求在卫星轨迹处获得05m2/s2精度的扰动位时，应当重新估算上述轨道的速度信息，或采用精度更高的GFZ事后科学轨道。

A new method was presented using satellite remote sensing data in the calculation of topography and flooding at littoral zone. Flooding lines were drawn from high resolution satellite remote sensing images at different tidal level, and the topography of littoral zone was calculated with these lines. Then, the littoral zone topography was applied in the calcuation of flooding, which was checked with the satellite remote sensing images.

提出了利用卫星遥感资料计算潮间带地形和漫滩的方法：选取一组不同潮位的卫星遥感图像，提取潮间带遥感淹水线，由遥感淹水线和数值模式结合推算潮间带地形，将推算的地形用于海水漫滩计算，并用遥感淹水线检验漫滩计算结果。

Firstly, the characteristics of satellite networks are analyzed and on the basis of the analysis, two SPN models for a single-layered LEO satellite network under half duplex mode and a double-layered satellite network under full duplex mode are constructed respectively.

首先分析了卫星网络的特点，并在此基础上建立了半双工通信模式下LEO单层卫星网络的SPN模型、全双工通信模式下LEO/MEO双层卫星网络的SPN模型。

Bilateral space cooperation is implemented in various forms, from making reciprocal space programs and exchanges of scholars and specialists, and sponsoring symposiums, to jointly developing satellite or satellite parts, and providing satellite piggyback service and commercial launching service.

双边合作的形式多种多样，从制定互利的空间计划、互派专家学者、组织研讨会，到共同研制卫星或卫星部件、进行卫星搭载服务、提供商业发射服务等等。

Bilateral space cooperation is implemented in various forms, from making reciprocal space programs and exchanges of scholars and specialists, and sponsoring symposiums, to jointly developing satellite or satellite parts, and providing satellite piggyback service and commercial launching service ,etc.

双边合作的形式多种多样，从制定互利的空间计划、互派专家学者、组织研讨会，到共同研制卫星或卫星部件、进行卫星搭载服务、提供商业发射服务等等。＊公共服务的精神素质

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。