BDS/GPS组合系统在不同随机模型下的精度分析
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摘要
合理的观测值权阵能提高BDS、GPS及其组合系统伪距单点定位的精度。对比分析了各系统在实测数据和模拟观测条件下等权模型、高度角模型、Helmert方差分量模型3种随机模型的定位精度。结果表明:在模拟观测条件下, BDS/GPS组合系统精度最高,BDS系统次之,基于Helmert方差分量模型的精度最优,高度角模型次之;在正常观测条件下, BDS系统平面精度高于GPS系统,但高程精度低于GPS系统,其余结论与模拟条件下结果一致。研究结果可在提高BDS、GPS及其组合系统伪距单点定位精度方法中起参考作用。
The reasonable right of observation array can improve the accuracy of the pseudo distance single point positioning of BDS,GPS and its combination system.In this paper,we analyze the positioning accuracy of three stochastic models,such as equal weight model,elevation model and Helmert variance component model,under the condition of measured data and simulated observation.The results show that the BDS/GPS combination system has the highest accuracy under the condition of simulated observation,that is,the BDS/GPS system is the highest,and the BDS system is the second,and the accuracy of the Helmert variance component model is the best,and the elevation model is the second.Under normal observation conditions,the accuracy of BDS system is higher than that of GPS system,but the elevation accuracy is lower than that of GPS system.The remaining conclusions are consistent with the results under simulated conditions.The results of the study can be used to improve the accuracy of BDS,GPS and its combination system pseudo-distance single point positioning accuracy.
The reasonable right of observation array can improve the accuracy of the pseudo distance single point positioning of BDS,GPS and its combination system.In this paper,we analyze the positioning accuracy of three stochastic models,such as equal weight model,elevation model and Helmert variance component model,under the condition of measured data and simulated observation.The results show that the BDS/GPS combination system has the highest accuracy under the condition of simulated observation,that is,the BDS/GPS system is the highest,and the BDS system is the second,and the accuracy of the Helmert variance component model is the best,and the elevation model is the second.Under normal observation conditions,the accuracy of BDS system is higher than that of GPS system,but the elevation accuracy is lower than that of GPS system.The remaining conclusions are consistent with the results under simulated conditions.The results of the study can be used to improve the accuracy of BDS,GPS and its combination system pseudo-distance single point positioning accuracy.
引文
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[12]杨徐,徐爱功,秦小茜,等.高度角定权模型的BDS/GPS伪距单点定位分析[J].导航定位学报,2017(6):72-78.
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[14]李德伟.随机模型对GPS/BDS联合定位精度影响研究[D].山东:山东理工大学,2016.
[15]段举举,沈云中.基于方差分量估计的GPS/GLONASS组合定位[J].测绘通报,2011(4):4-6.
[2]潘林,蔡昌盛,戴吾蛟,等.一种联合多历元观测信息的GPS/BDS组合单点定位方法[J].测绘通报,2015(2):5-9.
[3]Wenkun Yu,Wujiao Dai,Xiaoli Ding,et al.Stochastic Model of GPS/BDS Combined Standard Single Point Positioning[C]//China Satellite Navigation Conference(CSNC)2012 Proceeding.Springer Berlin Heidelberg,2012:325-331.
[4]邹波,李晓莉,陶庭叶,等.GPS/BDS组合系统伪距单点定位模型精度分析[J].测绘科学,2014(10):30-32.
[5]唐卫明,徐坤,金蕾,等.北斗/GPS组合伪距单点定位性能测试和分析[J].武汉大学学报:信息科学版,2015(4):529-533.
[6]高晓,戴吾蛟.抗差Helmert方差分量估计在GPS/BDS组合定位中的应用[J].大地测量学与地球动力学,2014(2):173-176.
[7]张小红,左翔,李盼,等.BDS/GPS精密单点定位收敛时间与定位精度的比较[J].测绘学报,2015(3):250-256.
[8]罗小敏,蔡昌盛,朱建军,等.利用Galileo IOV卫星观测数据的单点定位精度分析[J].武汉大学学报:信息科学版,2015(2):199-203.
[9]李鹤峰,党亚民,秘金钟,等.BDS/GPS/GLONAS-S融合定位模型及性能分析[J].测绘通报,2014(9):1-5.
[10]赵永卿.GPS\BDS组合单点定位随机模型的研究[D].四川:西南交通大学,2017.
[11]戴吾蛟,丁晓利,朱建军.基于观测值质量指标的GPS观测量随机模型分析[J].武汉大学学报:信息科学版,2008(7):718-722.
[12]杨徐,徐爱功,秦小茜,等.高度角定权模型的BDS/GPS伪距单点定位分析[J].导航定位学报,2017(6):72-78.
[13]陈浩,许长辉,高井祥,等.BDS、GPS及其组合系统伪距单点精度分析[J].山东科技大学学报,2015(4):72-78.
[14]李德伟.随机模型对GPS/BDS联合定位精度影响研究[D].山东:山东理工大学,2016.
[15]段举举,沈云中.基于方差分量估计的GPS/GLONASS组合定位[J].测绘通报,2011(4):4-6.