摘要
定位导航授时(PNT)是关乎国家战略的军民两用技术。传统的卫星导航系统易受干扰和遮挡,惯性导航存在误差积累问题,其提供的PNT服务均存在固有缺陷。以MEMS技术为基础的芯片原子钟和微惯性测量组合,与卫星导航技术相结合,形成微型定位导航授时单元。微型定位导航授时单元以精确的芯片原子钟为时钟基础,发播定位导航授时信号,搭建PNT网络。微型定位导航授时单元可以由微纳卫星、无人机等载体携带,数量可选、布局能控、组网灵活,克服了传统PNT存在的问题,改变PNT格局。
The positioning navigation and timing （PNT） is a dual-use technology which concerns the national strategy. The traditional global navigation satellite system is susceptible to the interference and the sheher and the inertial navigation error is accumulated. Based on the MEMS technology, combining the chip-scale atomic clock and the MEMS inertial measurement unit with the receiver of the global navigation satellite system, a micro positioning navigation and timing unit is formed. The atomic clock of the unit provides the precision clock signal, the unit broadcasts the positioning navigation and timing signal and the PNT nets are constructed. The units can be carried by micro-satellites or UAYs. The number of the units for the micro positioning navigation and timing system can be freely chosen and the arrangement can be freely configured. The micro positioning navigation and timing system can overcome the problems of the traditional PNT methods and change the pattern of the PNT.
出处
《科技导报》
CAS
CSCD
北大核心
2015年第12期116-119,共4页
Science & Technology Review
