On two calculations needed by ionospheirc grid rectification for difference satellite for gps 卫星定位系统网格校正的算法研究
The use of " global positioning system " for taxi pre - booking and fleet management 车辆卫星定位系统在的士预约服务及的士车队管理的应用
Installation of gps on taxis to ensure real - time booking and confirmation 在的士安装全球卫星定位系统，并确保乘客能即时预约及确认预约。
They also use global positioning systems to mark " hot spots " where the fishing is good 他们也用全球卫星定位系统去标示容易钓到鱼的热区。
The development of the gps and the computer technology bring new chance to the photogrammetry 全球卫星定位系统和计算机技术的快速发展给摄影测量领域带来了新的机遇。
We already have twenty - four navstar satellites orbiting the earth , making up what is called the global positioning system 我们已经有24颗环绕地球运行的导航卫星，组成了人们所说的全球卫星定位系统。
A regional satellite navigation system which is made up of geosynchronous satellites and synchronous satellites with elliptical orbit is proposed 摘要提出了一种用静止卫星和同步椭圆轨道卫星构造的区域卫星定位系统。
Bar code , pos , edi and gps systems dramatically improve the efficiency and accuracy of the logistics activities 条形码、销售时点系统、电子数据传输系统、全球卫星定位系统的使用,极大地提高了物流活动的效率和精确程度。
But new safety devices such as electronic beacons and gps locators have made it easier to find skiers buried in avalanches 但是新的安全装置，例如电子信号器以及全球卫星定位系统，已经让被雪崩埋住的滑雪者更容易被找到。
Provide a stepstone for various initiatives and future developments , for instance , gps , wap phone booking and online credit card charge , etc 为多项措施及未来发展（例如全球卫星定位系统、 wap电话预约及在线信用卡收费等）提供基础。
