基于不同卫星截止高度角的伪距单点定位性能
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摘要
随着全球卫星导航系统的飞速发展,GPS和GLONASS两种导航系统在全球得到广泛应用,并且目前应用最为广泛的导航定位模式是伪距单点定位。然而在山区或城区等遮挡严重区域,伪距单点定位精度在很大程度上受卫星截止高度角的影响。因此,文章开展了在0(°)～30(°)(间隔为5(°))的卫星截止高度角条件下,GPS、GLONASS以及两者组合的伪距单点定位实验。实验结果表明:两者组合定位模式对卫星截止高度角最不敏感; GLONASS受截止高度角影响最大;此外,在临界截止高度角处,三维方向中U方向受其影响最大。
With the rapid development of global satellite navigation systems,both GPS and GLONASS navigation systems are widely used in the world. The widely-used navigation positioning mode is pseudo-range single point positioning. However,in the areas such as mountainous areas or urban areas that are heavily covered,its accuracy is largely affected by the satellite cut-off elevation angle. Therefore,the article carries out a pseudo-range single point positioning experiment of GPS,GLONASS. We know of a combination of the both at a satellite cut-off elevation angle of 0( °) to 30( °)( 5( °) spacing). The experimental results show that the combined positioning mode is the least sensitive to the satellite cut-off elevation angle. Glonass is the most affected by the cut-off elevation angle. In addition,at the critical elevation cut-off angle,the U direction in the three-dimensional direction is most affected.
With the rapid development of global satellite navigation systems,both GPS and GLONASS navigation systems are widely used in the world. The widely-used navigation positioning mode is pseudo-range single point positioning. However,in the areas such as mountainous areas or urban areas that are heavily covered,its accuracy is largely affected by the satellite cut-off elevation angle. Therefore,the article carries out a pseudo-range single point positioning experiment of GPS,GLONASS. We know of a combination of the both at a satellite cut-off elevation angle of 0( °) to 30( °)( 5( °) spacing). The experimental results show that the combined positioning mode is the least sensitive to the satellite cut-off elevation angle. Glonass is the most affected by the cut-off elevation angle. In addition,at the critical elevation cut-off angle,the U direction in the three-dimensional direction is most affected.
引文
[1]严超,余学祥,徐炜,等. GPS/BDS/GLONASS组合伪距单点定位性能测试与分析[J].全球定位系统,2017,42(2):25-31.
[2]安向东. GPS与北斗伪距单点定位性能对比分析[J].全球定位系统,,2014,38(3):8-14.
[3]袁宏超,秘金钟,高猛,等.双导航定位系统伪距单点定位方法与精度分析[J].导航定位学报,2014,2(3):38-43.
[4]卫星导航定位新技术及高精度数据处理方法[M].武汉:武汉大学出版社,2009.
[5]李征航,黄劲松. GPS测量与数据处理[M].武汉:武汉大学出版社,2010.
[6]刘基余.全球导航卫星系统及其应用[M].测绘出版社,2015.
[2]安向东. GPS与北斗伪距单点定位性能对比分析[J].全球定位系统,,2014,38(3):8-14.
[3]袁宏超,秘金钟,高猛,等.双导航定位系统伪距单点定位方法与精度分析[J].导航定位学报,2014,2(3):38-43.
[4]卫星导航定位新技术及高精度数据处理方法[M].武汉:武汉大学出版社,2009.
[5]李征航,黄劲松. GPS测量与数据处理[M].武汉:武汉大学出版社,2010.
[6]刘基余.全球导航卫星系统及其应用[M].测绘出版社,2015.