海面地形的确定方法研究对提高双星导航定位系统海面用户定位精度具有重要意义。
The determination method of sea surface topography is important for sea users to improve the positioning accuracy with the double satellite navigation and positioning system.
运用北斗双星导航定位系统的双向短报文通信技术，实现了区域报警和行驶车队之间的通信以及寻迹。
It also realizes area alarm, communication and seeking among the running vehicles depending on BeiDou 's both-direction and short-message communicating technique.
运用北斗双星导航定位系统的双向短报文通信技术，实现了区域报警和行驶车队之间的通信以及寻迹。
It also realizes area alarm, communication and seeking among the running vehicles depending on BeiDou's both-direction and short-message communicating tech...
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