摘要
为了提高GPS单频伪距差分定位精度,提出了一种利用已有CORS系统进行伪距差分定位的方法.该方法以单站伪距差分为基础,利用改进的伪距差分模型,首先将各参考站伪距改正数除去接收机钟差影响,再通过参考站与流动站的位置关系建立伪距改正数线性组合内插模型.最后将模型内插得到的综合伪距改正数发送至流动站用户,实现伪距差分定位.实验表明,该方法能有效克服常规伪距差分定位精度不高,且随基线长度增加精度递减的缺陷.多参考站伪距差分能够较稳定地实现分米级定位,精度分布均匀.
In order to improve the pseudo-range differential positioning accuracy with single frequency receiver,a pseudo-range differential positioning method using the existing continuously operating reference station（CORS） is presented.Based on the theory of single pseudo-range differential position and the improved pseudo-range difference model,firstly this method removes the influence of receiver clock-offsets from reference stations pseudo-range correction.Secondly,the linear interpolation model of pseudo-range correction is built through the position relation between reference stations and rover station.Finally,the integrated pseudo-range correction is calculated and sent to the rover station so as to achieve pseudo-range differential positioning.Experimental results show that this method effectively overcomes the shortcomings of low accuracy in conventional pseudo-range differential positioning,which may even decrease with the increase of baseline length.The pseudo-range differential positioning accuracy with multiple reference stations can reach decimeter-level stably and is well-distributed.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第2期316-319,共4页
Journal of Southeast University：Natural Science Edition
基金
"十一五"国家科技支撑计划重点资助项目(2008BAJ11B05)
关键词
伪距差分定位
内插模型
综合伪距改正数
多基站
pseudo-range differential positioning
interpolation model
integration pseudo-range correction
multiple reference stations
