GNSS参考站网络的对流层完备性监测技术研究

为了保证移动用户定位时间和空间上的可用性和可靠性,本文针对GNSS多参考站网络(MRS)技术的双差对流层改正一阶项已在数据处理中心扣除的特点,提出了两个衡量流动端残余误差的双差对流层完备性监测指标,对流层残差完备性监测指标(Tropospheric Residual IntegrityMonitoring,TRIM)和对流层残差内插不确定性指标(Tropospheric Residual InterpolationUncertainty,TRIU)。基于四川GPS综合服务网络(SIGN)的实测数据表明,本文提出的双差对流层残差完备性监测指标TRIM和残差内插不确定性指标TRIU能够较好地反映出对流层一阶以上残余误差对流动端模糊度解算和坐标求解的影响,是对流层完备性监测的一个非常有效的手段,可用于GNSS参考站网络数据处理系统中进行实时对流层完备性监测。

Investigation into tropospheric integrity monitoring technique for GNSS multiple reference stations

For the purpose of ensuring the usability and reliability for the mobile user in positioning, two indicators for the integrity monitoring in double-differenced tropospheric delay are proposed in this paper, including Tropospheric Residual Integrity Monitoring （TRIM） and Tropospheric Residual Interpolation Uncertainty （TRIU） while taking into consideration that the first-order of double-differenced tropospheric delay residuals have been taken out in data computing center in terms of GNSS Multiple Reference Stations technique. Test data acquired from SIGN （Sichuan Integrated GPS Network） are used to evaluate the performance of the proposed indicators. The results show that, TRIM and TRIU can perfectly represent the errors ＂seen＂ for the ambiguity resolution as well as coordinates estimate by the rover thus they are the useful tools to predict the rover performance and could be used for real-time integrity monitoring of double- differenced tropospheric delay in data processing software of GNSS multiple reference stations network.