区域大气增强伪距单点定位算法及性能验证  

Regional Atmospheric Enhanced Pseudo-Range Single Point Positioning Algorithm and Performance Verification

作　　者：雷哲哲 陈镜渊 田宇[1] 邵搏[1] 王家兴 LEI Zhezhe;CHEN Jingyuan;TIAN Yu;SHAO Bo;WANG Jiaxing

机构地区：[1]中国电子科技集团公司第二十研究所,西安710068

出　　处：《现代导航》2023年第3期179-182,189,共5页Modern Navigation

摘　　要：传统的伪距单点定位模型,受限于模型噪声、轨道钟差精度和大气误差修正精度等因素,难以获得高精度的定位结果,已经无法满足现代化应用场景的需求。提出了一种区域大气增强的伪距单点定位方法,能够显著改善伪距单点定位的定位性能。算法采用精密轨道钟差产品削弱卫星轨道钟差误差,使用区域大气参数削弱对流层电离层误差,采用双频非组合模型降低观测模型噪声。实测数据的验证结果表明,区域大气增强伪距单点定位方法的定位精度均方根(RMS)在水平方向优于0.2 m,高程方向优于0.25 m,定位精度的提升非常显著,同时亚米级的伪距单点定位精度在实际工程应用中也具备重要的参考价值。The traditional pseudo-range single point localization model is difficult to obtain high-precision positioning results and cannot meet the needs of modern application scenarios,because of factors such as model noise,orbit clock error accuracy and atmospheric error correction accuracy.A pseudo-range single-point positioning method for regional atmospheric augmented is proposed,which can significantly improve the positioning performance.The algorithm uses precision orbit and clock products to reduce the satellite orbit clock error,uses regional atmospheric parameters to weaken the tropospheric ionospheric error,and uses dual-frequency uncombined model to reduce the noise of the observation model.The verification results of the measured data show that the positioning accuracy root mean square(RMS)of the regional atmospheric augmented pseudo-range single point positioning method is better than 0.2 m in the horizontal direction and 0.25 m in the elevation direction,the positioning accuracy is greatly improved.The sub-meter pseudo-range single point positioning accuracy has important reference value in practical engineering applications.

关 键 词：全球卫星导航系统 伪距单点定位 区域大气增强 亚米级定位 

分 类 号：P228[天文地球—大地测量学与测量工程]