公路-机动型可能精度较低，但是能通过增加卫星导航和部署能力来改进，像通过美国的全球定位系统（GPS）或俄罗斯的全球轨道导航卫星系统（GLONASS）部署到发射平台。
The road-mobile variant might have a lower accuracy but this can be improved by adding satellite navigation and positioning capability such as GPS or GLONASS to the launch platform.
GPS全球定位系统是美国研制并在10年前投入使用的卫星导航与定位系统，其应用技术已遍及国民经济的各个领域。
GPS was satellite navigating and positing system, which was researched and used in the USA, about 10 years ago. Its application has been spreaded over the international economy.
美国全球定位系统GPS是目前性能最完善、定位精度最高、应用最广泛的卫星导航定位系统。
The Global Positioning System (GPS) of U. S is a satellite navigation and position system that now has the best performance , the highest precision of position and it is widely applied in everywhere.
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