UNB3模型的性能分析及在卫星定位的应用研究

Performance Evaluation of UNB3 Model and Its Application to Satellite Positioning

摘要:

卫星导航接收机的定位精度受大气对流层延时估计准确度的影响较大,因此提出在RTKLIB软件中利用UNB3对流层延时模型替代现有的Saastamoinen对流层延时模型,以提高对流层延时的计算精度;通过对比分析的方法,对Saastamoinen模型和UNB3模型的对流层延时的误差精度进行了理论分析,并利用卫星导航实测数据进行对流层延时计算误差和伪距残差的性能对比分析,论证所提出的替代方案的可行性;采用UNB3对流层延时模型的RTKLIB软件的定位精度比现有的定位精度有较好的提升。

Abstract:

The positioning accuracy of satellite navigation receiver is effected by the accuracy of tropospheric delay model.This paper proposes that the use of UNB3 tropospheric delay model to replace the existing Saastamoinen’s in RTKLIB in order to improve the positioning accuracy. Through comparative analysis, both Saastamoinen tropospheric delay and UNB3 models are given theoretical analysis in their accuracy .And the use of satellite navigation data were measured to analyze their calculation error in tropospheric delay and pseudo-range residuals, which demonstrated the improvement of the proposed alternative. By using UNB3 tropospheric delay model, positioning accuracy in RTKLIB shows better results than the existing one.