摘要
本文首先简述了目前发展参差不齐的四大全球导航与定位系统。从性能及实用性方面分析了四大导航与定位系统的发展现状,并指出了导航与定位系统产业面临的挑战。
The article demonstrates the present four global positioning and navigation systems,which developing statement is very different.The article also gives us circumstance the four systems have been facing now,and points out challenges of navigation industry.
出处
《汽车与配件》
2010年第40期20-21,共2页
Automobile & Parts
