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导航卫星自主运行
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导航卫星自主运行
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工学
导航卫星运行控制
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autonomous operation of navigation satellites
导航卫星自主运行
在不依赖于地面控制系统的情形下,仅利用星间链路观测数据确定导航定位所需的卫星星历信息并维持系统正常运行的一种导航卫星运行状态。
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urban survey unit
urban sustainability
urban sustainable development
urban system
urban system function structure in the administration area of city
urban system planning
urban system planning in the administration area of city
Urban System Planning of the Zhujiang River Delta
urban system scale structure in the administration area of city
urban systems engineering
urban system spatial pattern in the administration area of city
urban system theory
urban thermal environment
urban topographic survey
urban traffic
urban traffic construction management system
urban traffic management platform
urban traffic management system
urban traffic system
urban traffic tunnel fire
urban transportation
urban transportation demand management
urban transportation development policy
urban transportation economy
urban transportation layout
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