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测绘学报  2015 

BDS/GPS精密单点定位收敛时间与定位精度的比较

DOI: 10.11947/j.AGCS.2015.20130771, PP. 250-256

Keywords: 北斗卫星导航,精密单点定位,定位精度,收敛时间

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Abstract:

采用武汉大学卫星导航定位技术研究中心发布的北斗精密卫星轨道和钟差,在TriP2.0软件的基础上实现了BDSPPP定位算法,并利用大量实测数据进行了BDS/GPS静态PPP和动态PPP浮点解试验.结果表明,BDS静态PPP的收敛时间约为80min,动态PPP的收敛时间为100min;对于3h的观测数据,静态PPP收敛后定位精度优于5cm,动态PPP收敛后水平方向优于8cm,高程方向约12cm;与GPSPPP类似,东分量上定位精度较北分量稍差.当前由于BDS的全球跟踪站有限,精密轨道和钟差精度不如GPS,因此BDSPPP的收敛时间较GPS长,但收敛后可实现厘米至分米级的绝对定位.

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