卫星系统

Matsuura Bridge, Central Command area of cable-stayed bridge to prestressed cables, cords and duct construction and installation to take GPS global satellite positioning system for spatial orientation, select no wind, no sun in the morning and evening measurements, measured twice a day, any size guarantee 100 meters altitude error of less than 10 mm to ensure the accuracy of the construction.

松浦大桥指挥部对斜拉桥拉索区环向预应力、索导管安装等施工采取GPS全球卫星定位系统进行空间定位，选择无风、无阳光的清晨和傍晚进行测量，每天测量两次，保证百米高空任何尺寸误差在10毫米以内，确保施工精度。

For the purposes of radiation-climate research and the application of satellite radiation measurements over the Tibetian plateau area, the solar heating and solar radiation budget for plateau's realistic atmospheres were calculated and compared with the results for midlatitude model atmospheres.

文中还利用高原地区高空温、压、湿的气候资料，计算了高原实际大气的太阳辐射收支和加热率，并与中纬度模式大气的计算结果进行了比较。本文模式计算得到的一些结果在利用卫星观测确定高原地区地气系统的辐射平衡的研究中将得到应用。

The spread spectrum communications are widely used in modern military communications, satellite communications, mobile communications and command, control, communication and intelligence( C~3I ) systems, because of its well multi-address access, low probability of interception, excellent performance of anti-jamming and secrecy.

扩展频谱通信作为新型的通信方式，由于其具有多址接入、低载获特性和较强的抗干扰能力，因此在现代军事通信、卫星通信、移动通信和指挥控制通信和情报(C~3I)系统中得到了广泛的应用。

The navigation satellite system is a key space infrastructure, capable of providing services including highly accurate location, velocity measuring, and time transmission, and bringing enormous benifits in society and economy.

卫星导航系统是重要的空间基础设施，可提供高精度的定位、测速和授时服务，能带来巨大的社会和经济效益。

NCC is the core of VSAT satellite communications system.

网控中心是VSAT卫星通信系统的核心。

In this paper, firstly, the new combined error model of cumulative geoid height influenced by three error sources including the inter-satellite range-rate of K-band ranging system, orbital position of GPS receiver and non-conservative force of accelerometer from GRACE satellites is established using the semi-analytical method. Secondly, the dependability of error models is demonstrated based on matching relationship among the accuracy indexes of key payloads. Finally, the accuracy of global gravitational field up to degree and order 120 is effectively and rapidly estimated from GRACE Level 1B measured observation errors of the year 2006 publicized by the Jet Propulsion Laboratory in the USA, and the cumulative geoid height error is 18.368 cm at degree 120, which preferably accords with the Earth's gravitational field model EIGEN-GRACE02S provided by the GeoForschungsZentrum Potsdam in Germany.

首先基于半解析法建立了新的GRACE卫星K波段测量系统星间测速、GPS接收机轨道位置和加速度计非保守力误差联合影响累计大地水准面的误差模型；其次，基于各关键载荷精度指标的匹配关系，论证了误差模型的可靠性；最后，基于美国喷气动力实验室公布的2006年的GRACE Level 1B实测误差数据，有效和快速地估计了120阶全球重力场的精度，在120阶处累计大地水准面的精度为18.368 cm，其结果和德国地学研究中心公布的EIGEN-GRACE02S全球重力场模型符合较好。

B communication by an establishment of a transmission or retransmission embodying a performance or display of a nondramatic musical work intended to be received by the general public, originated by a radio or television broadcast station licensed as such by the Federal Communications Commission, or, if an audiovisual transmission, by a cable system or satellite carrier, if

b一个设施传播或二次传播从一个得到像联邦通讯委员会这样的机构许可的广播或电视站播放的(如果是视听传输，则通过有线系统或卫星电波来播放)、旨在让大众接收到、含非戏剧音乐作品的表演或展示的行为，如果--。

Communication by an establishment of a tra mi ion or retra mi ion embodying a performance or di lay of a nondramatic musical work intended to be received by the general public, originated by a radio or television broadcast station lice ed as such by the Federal Communicatio Commi ion, or, if an audiovisual tra mi ion, by a cable system or satellite carrier, if

一个设施传播或二次传播从一个得到像联邦通讯委员会这样的机构许可的广播或电视站播放的（如果是视听传输，则通过有线系统或卫星电波来播放）、旨在让大众接收到、含非戏剧音乐作品的表演或展示的行为，如果

In space microgravity environment, the platform consisted of two-axis system and small-satellite has properties as follow: attitude disturbance, redundancy, nonholonomic constraint.

太空微重力环境下，二轴系统和微小卫星组成的平台具有：姿态干扰性、跟踪冗余性、动力约束非完整性。

In this paper,we analyze the key techniques for the service precision of Global Navigation Satellite System such as time reference,time synchronization,satellite orbit determination,etc.

对影响导航定位系统定位精度的各种因素进行了分析。研究了影响导航定位精度的关键技术问题，如时间基准、时间同步和卫星定轨等。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。