区域大气增强伪距单点定位算法及性能验证

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。

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

The traditional pseudo-range single point localization model is difficult to obtain high-precision positioning resultsand cannot meet the needs of modern application scenarios, because of factors such as model noise, orbit clock error accuracy andatmospheric error correction accuracy. A pseudo-range single-point positioning method for regional atmospheric augmented isproposed, which can significantly improve the positioning performance. The algorithm uses precision orbit and clock products toreduce the satellite orbit clock error, uses regional atmospheric parameters to weaken the tropospheric ionospheric error, and usesdual-frequency uncombined model to reduce the noise of the observation model. The verification results of the measured data showthat the positioning accuracy root mean square (RMS) of the regional atmospheric augmented pseudo-range single point positioningmethod is better than 0.2 m in the horizontal direction and 0.25 m in the elevation direction, the positioning accuracy is greatlyimproved. The sub-meter pseudo-range single point positioning accuracy has important reference value in practical engineeringapplications.