navigation n. 1.航行;导航;领航;航海[航空]术。 2.〔集合词〕船。 3.〔古语〕航路;海上交通。 aerial navigation 空中航行。 inland navigation 内河航行。 astro navigation 宇宙航行;天文导航。 blind navigation 仪表导航。 the N- Acts 〔英国〕航海条例。 There has been an increase in navigation through the canal. 通过那条运河的船数增多了。 adj. -al
station n. 1. 站,台,车站;航空站,机场。 2.派出所;署,局,所。 3.【无线电】电台,电视台。 4. 驻地,部戍地,根据地,警备区域;基地;〔集合词〕基地全体人员。 5.停泊地;军港;〔美国〕空军兵站。 6.部位,位置,场所。 7.地位;身分;职位,岗位。 8.停留,停驻;站立(姿势)。 9.【生物学】=habitat. 10.【宗教】耶稣受难十四处之一(或其图画之一幅)。 11.【测】测点,测站,标准距离。 12.〔澳大利亚〕牧场。 13.〔美国〕邮政局;〔海关用语〕仓库。 a midway station 错车车站。 a station agent 〔美国〕(火车站)站长。 a power station 发电厂。 an atomic station 原子能发电站。 an air station 飞机场。 a broadcasting station 广播电台。 people of station 有地位的人。 station call letters 电台呼号。 station in life 【法律】身分。 station waggon 〔美国〕车站接送汽车,客货两用汽车,面包车。 take up a convenient station 占有利地位。 take up one's appointed station 各就指定岗位。 vt. 驻扎,安置,配置,设置。 station a guard at the gate 门口设置一个警卫员。
In the area navigation system, we may suppose all of navigation stations and the users on the same horizontal level 在区域导航定位系统中,假设导航台和用户都在同一水平面。
In this paper, the gdop ( geometric dilution of precision ) expression of area navigation system is deduced . using the matrix theory the lowest gdop and that gdop is smaller with more navigation stations are proved in theory 本论文推导了区域导航定位系统的几何精度因子,并用矩阵理论对其最小值及其随导航台个数增加而减小进行了证明。
Spread spectrum code emitted by navigation station has correlative operation with the signal produced by receiver, through measuring the place of maximal correlative function, we can measure the spreading time of the navigation station ’ s signal, so we can measure the distance between navigation station and receiver 区域导航利用导航台发射的扩频码与接收机产生的本地信号进行相关运算,通过测量相关函数最大值的位置,来测定导航台信号传播时间,从而测定导航台到接收机的距离。
Spread spectrum code emitted by navigation station has correlative operation with the signal produced by receiver, through measuring the place of maximal correlative function, we can measure the spreading time of the navigation station ’ s signal, so we can measure the distance between navigation station and receiver 区域导航利用导航台发射的扩频码与接收机产生的本地信号进行相关运算,通过测量相关函数最大值的位置,来测定导航台信号传播时间,从而测定导航台到接收机的距离。
Spread spectrum code emitted by navigation station has correlative operation with the signal produced by receiver, through measuring the place of maximal correlative function, we can measure the spreading time of the navigation station ’ s signal, so we can measure the distance between navigation station and receiver 区域导航利用导航台发射的扩频码与接收机产生的本地信号进行相关运算,通过测量相关函数最大值的位置,来测定导航台信号传播时间,从而测定导航台到接收机的距离。