【摘 要】
：
随着流动站与基准站之间距离增大,单基准站RTD(Real Time Differential,伪距差分)定位精度降低,不能满足长基线定位要求.为提高单参考站RTD定位精度,本文提出一种基于多基准
【机 构】
：
航天恒星科技有限公司,北京,中国,100086
论文部分内容阅读
随着流动站与基准站之间距离增大,单基准站RTD(Real Time Differential,伪距差分)定位精度降低,不能满足长基线定位要求.为提高单参考站RTD定位精度,本文提出一种基于多基准站的网络RTD定位方法.该方法在单基准站RTD改正数的基础上,生成各个参考站伪距改正数,然后根据流动站的概略坐标,通过内插模型生成流动站的综合伪距改正数,最后通过网络将伪距改正数播发至流动站用户,修改流动站伪距观测值进行定位,得到定位结果.本文对比北斗与GPS伪距差分定位精度,并在此基础上融合北斗/GPS双系统进行RTD定位,能够大大提高可用卫星数目,提高RTD定位精度.结果表明,使用多基准站网络RTD定位能够达到亚米级定位精度,定位结果稳定,并且通过北斗/GPS系统融合定位能够提高系统可用率.
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