GPS定位的误差来源与未来发展

Error Origin of GPS Location and Its Developement in Future

摘要:

GPS定位的精度受到诸多因素的影响,其主要误差来源包括与GPS卫星有关的误差、与信号传播有关的误差、与接受设备有关的误差。GPS的未来发展,一是依赖于1999年底研制成功的新一代BlockⅡF工作卫星,它们将逐步代替目前轨道上的BlockⅡR卫星,其寿命为现有卫星的3倍;二是采用第3个民用频率(L3C)发播不保密的民用信号,民间用户无需解算整周相位模糊值,在大幅缩短观测时间的前提下,能获得厘米级的定位精度,大大提高观测成果的可靠性和工作效率。我国在卫星定位领域已取得突破性进展,“北斗导航定位系统”的建成对我国国民经济建设和国家安全有重要作用。

Abstract:

Precision of GPS location is effected by many elements.Major error origins are error related with GPS satellite,error related with signal propagation and error related with accepting equipments.In the future,developement of GPS depends on two sides: one is newly created Block ⅡF satellite,which will replace present BlockⅡR satellite,its age is 3 times as the present one;the other side is to use L_3C to propagate civil signal which need not be kept secrets.People do not need to measure phase fuzzy values in ...