张绍成, 郭际明, 孟祥广. 非差虚拟观测值的网络RTK实现[J]. 武汉大学学报 ( 信息科学版), 2011, 36(10): 1226-1230.
引用本文: 张绍成, 郭际明, 孟祥广. 非差虚拟观测值的网络RTK实现[J]. 武汉大学学报 ( 信息科学版), 2011, 36(10): 1226-1230.
ZHANG Shaocheng, GUO Jiming, MENG Xiangguang. An Implementation of Zero Difference VRS Observation for Network-RTK[J]. Geomatics and Information Science of Wuhan University, 2011, 36(10): 1226-1230.
Citation: ZHANG Shaocheng, GUO Jiming, MENG Xiangguang. An Implementation of Zero Difference VRS Observation for Network-RTK[J]. Geomatics and Information Science of Wuhan University, 2011, 36(10): 1226-1230.

非差虚拟观测值的网络RTK实现

An Implementation of Zero Difference VRS Observation for Network-RTK

  • 摘要: 网络RTK是利用多基准站观测值实现流动站附近的误差建模,其中包括对流层、电离层延迟和卫星轨道等误差。讨论了利用VRS技术实现网络RTK中的几个关键技术,包括将多基准站插值所得的双差大气延迟添加到非差模式的VRS观测值中,利用IGS的超快速星历中的预报部分改正广播星历误差和利用恒星日滤波改正VRS的伪距多路径效应。24 h的测试数据证实,该算法应用在50 km间隔的基线网中,所生成虚拟观测站与流动站单历元解算成功率达到81.1%,而RTK定位结果显示其连续解算成功率达到97.6%,其定位结果在北、东和高方向中误差分别达到1.1 cm、1.1 cm和3.0 cm。

     

    Abstract: The principle of a VRS based network-RTK system is to use multiple reference stations to correct the error sources around the rover station,including tropospheric delays,ionospheric delays and also orbit errors.In this paper,we mainly discuss how to generate zero difference observations base on the double difference atmospheric delay.To ensure the quick ambiguity resolution on the rover station,the predict part of ultra-rapid IGS orbit is employed to correct the broadcast orbit,and also a sidereal day fitter is used to reduce the pseudorange multipath effect on the VRS station.In this paper,a 50 km baselines CORS triangle are used to test the algorithm,24 h results shows the single epoch ambiguity resolution success rate is 81.1% and the RTK algorithm get 97.6% fixed solution with the RMS of 1.1 cm in north,1.1 cm in east and 3.0 cm in up direction.

     

/

返回文章
返回