【2010-02-050】基于移动互联网的自动化交通调查技术研究与开发 。通过手机信号参数计算出手机与相邻基站的距离，再结合平面几何原理对手机进行定位，获取其平面位置坐标。辅助卫星定位(Assisted GPS，A-GPS)的定位原理是在手机内加装GPS定位芯片，通过卫星信号计算位置，定位时间从10 min缩短到几秒钟。
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辅助全球卫星定位系统 Assisted GPS ; Assisted Global Positioning System ; GPS and Assisted GPS ; Auxiliary satellite global positioning system
系统辅助卫星移动定位 SAMPS
卫星辅助定位系统 Satellite Based Augmentation System ; SBAS
而当今可以应用于卫星辅助导航技术的卫星定位系统主要有两个：GPS系统与GALILEO系统。
There are two navigation satellite systems which can be used in this technology: GPS and GALILEO.
卫星辅助定位技术在定位的精度、可用性和连续性上受到人们的普遍关注。
Assisted satellite positioning technology is drawing more and more attention currently due to its navigation accuracy, availability and integrity.
介绍了基于基站网络、卫星定位和辅助GPS三种常见的定位技术。
Introduced three common positioning technology, include Cell-ID, satellite positioning and GPS assistant.
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