查询词典 GPS

With the rapid expansion of GPS application areas, as well as the development of China's Beidou positioning system, it is necessary to have the knowledge of GPS and design with independent intellectual property rights of the GPS baseband chip.

随着GPS应用领域的迅速扩展以及我国北斗定位系统的发展，掌握GPS相关知识和设计具有自主知识产权的GPS基带芯片是必要的。

In the presently mobile position technology, GPS's position method is one of the best. This method owns high accuracy less than 15 meters, and can be used with GPS chip in the mobile station. But GPS chip with the high price makes this technology difficult to popular. Therefore, the position technology of GSM communication network is attention to the people gradually. TOA or AOA is more often used among position technology, these methods need only the help of the position measuring instrument to attain time and angle for position calculation. They have good position accuracy, but they are also too expensive to popular. Every positioning technology has its bottleneck such as external environment influence, cost and positing efficiency. Therefore, the purpose of this research lies in finding out the mobile station location and does not emphasize the raise of the accuracy and it only uses existing information to finish position action.

在目前的行动定位技术中，以GPS定位技术为最佳，不仅拥有少於15公尺的高定位精确度，更只需在行动端加装GPS晶片即可使用，可惜高价格的GPS晶片使得此技术难以普及化，因此，以GSM通讯网路为主的定位技术逐渐受人们所重视，其中，又以TOA或AOA等定位技术较常被使用，仅透过位置测量仪器的帮助，便可取得定位所需的时间和角度，并且拥有不错的定位精确度，可惜也受到高价格因素的关系难以普及化，而每种定位技术都有其瓶颈存在，不论是外在环境的影响、成本和定位效能上；所以，本研究的目的在於找出行动端位置，即利用现有的资讯（细胞识别码、讯号强度等）来完成定位动作，而非强调其定位精确度的提高。

Furthermore, they continuously transmit radio signals of low power and ultra high frequency. They are also equipped with atomic clocks. When GPS receivers intend to calculate its GPS position on the earth, they will receive the signals from satellites, calculate transmission time with a pre-stored ephemeri, and then calculate the distances between themselves and at least four GPS satellites with the method of trilateration.

所有的卫星架有原子钟，当GPS接收器要找出自己目前在地球表面上的位置时，会接收各卫星的讯号，并依储存的星历表计算传送时间，再利用三边测量法订出自己与至少四颗GPS卫星之间的精确距离，即可算出所在位置。

Error sources of velocity estimate have been changed since SA was off. Firstly influence quantities of all kinds of error sources of velocity determination were analyzed, the potential accuracy of GPS absolute velocity estimate was derived from both theory and field GPS data simulation.

首先从理论和实测数据模拟两方面分析了SA取消后各类误差源对GPS测速的影响，推导并计算了GPS单点测速可能达到的精度水平。

After that, two tests were carried on to evaluate the performance of GPS absolute velocity determination in the case of a static and an airborne GPS receiver and INS device kinematic case.

然后用静态数据模拟动态测速试验和实测动态数据测速与同步高精度惯导测速的动态试验进行验证。

The heading determination model based on two total positioning systemis used to calibrate the ship alongshore heading together with the GPS attitude determination equipment, time synchronization system via receiving GPS second pulse to synchronize the two kinds of data is also designed.

结合GPS姿态测量设备，通过采用数据插值融合技术，进行舰船组合航向测量。为了提高组合航向测量的精度，设计了通过接收GPS秒脉冲对两种航向测量数据进行时间同步的系统。

It points out the topic, meaning and creative; introducing the consist and principle of the intelligent vehicle navigate system in chapter 2; analyzing the method of GPS-oriented and the error origin in chapter 3; analyzing briefly the principle and merged method of interspaced diversity and resist multi-decline in chapter 4; introducing the hardware and software realization of ambulant station of intelligent vehicle navigate /dispatcher system based on multi-GPS antenna in detail in chapter 5; giving the debugging and simple trial result of ambulant station in chapter 6; The lasted propose solving tactics to problem that exist in studying, draws a conclusion of this thesis and plans the future researching works.

指出本课题的研究的主题、意义及创新点；第二章概括性介绍了智能车辆定位导航系统的组成与原理；第三章分析了GPS定位的方法和误差来源；第四章重点分析了空间分集抗多经衰落的原理和信号合并方法；第五章详细介绍了多GPS天线智能车辆导航/调度系统车载台的软硬件实现；第六章给出了车载台的调试和简单试验结果。最后对研究中存在的问题提出了解决策略及下一步的研究方向。

The theory and algorithm of time synchronization about LEO are discussed with the key technique in many ways. On the basis of Bernese 5.0 GPS Software, onboard GPS receivers clock error about GRACE is processed, and the results-specific analysis is computed.

研究了利用星载GPS接收机进行低轨卫星与卫星时间同步，探讨了其中的关键技术，以Bernese 5.0软件为基础，对GRACE卫星的星载GPS接收机钟差进行了解算，具体分析了解算结果。

GPS data were processed with BERNESE GPS software V4.2 developed at the Astronomical Institute of the University of Berne and QOCA Version 1.21 developed by Dr.

研究区内总共布设42个监测点，其中20个点位为GPS点；16个点位为精密水准点；6个点位实施GPS兼精密水准测量。

The text analyses GPS observation model, the characteristic of kinds of errors fountain and the adopting measures in the observation, and processes the thorough research to Bernese GPS Software Ms-Windows Version 4.2. It makes the most stable satellites as the main error. The differential way adopts non-differential way and double differential way. The positioning precision of the single point is decimeter level. RMS is within 0.01~0.02; If the ambiguity right and without week skip, the observation datum of a EPOCH-BY-EPOCH can make the short base line（S0km）positioning precision reach centimeter level.

本文分析了GPS的观测模型、观测量中各种误差源的特点及应采取的措施，并对Bernese GPS Software Ms-Windows Version 4.2 软件进行了深入的研究，它是以最稳定的卫星作为主差，采用非差和双差两种差分方法，单点定位精度在分米级，RMS能在0.01~0.02以内；在模糊度已求解正确条件下，若没有周跳，一个历元的观测数据就可以使短基线（S0km）定位精度达到厘米级。

The teacher likes the honeymouthed little girl very much.

老师很喜欢这个嘴甜的小姑娘。

Mr. Notker Bien's interests are traveling, spending quality time with the family and long-distance-running.

诺特卡·柏恩先生热爱旅游，长跑，以及和家人一起共度美好时光。