相位平滑伪距辅助GNSS三频非差数据实时周跳探测与修复

CPSP aided real-time cycle slip detection and repair for triple-frequency un-differenced GNSS observation

针对目前几乎所有三频周跳探测与修复方法都会受到伪距噪声和多路径效应影响的问题,提出了采用相位平滑伪距方法来辅助三频周跳探测与修复.采用GPS/QZSS和BDS实测三频数据对该方法进行了验证.结果表明:该方法可大幅削弱伪距噪声和多路径效应对周跳修复的影响,提高周跳确定成功率.经过相位平滑伪距后,周跳浮点值与真值之间的均方根(RMS)误差,对于GPS/QZSS三个频点L1,L2,L5 平均分别降低40.389%、40.758%和 40.023%,对于BDS三个频点B1,B2,B3 平均分别降低12.083%、14.290%和 18.781%.

The performances of all current cycle slip detection and repair (CDR) algorithms would be affected by the pseudo-range noise and multipath effects. A carrier-phase smoothing of pseudo-range(CPSP) method was used to aid the triple-frequency cycle slip detection and repair. The performance of the method was verified with GPS/QZSS and BDS triple-frequency observations. The results show that the influence of pseudo-range observation noise and its multi-path effects on the CDR is reduced and the success rate of CDR is improved. Using the CPSP approach, the differences of the root mean square (RMS) between float and true integer values are decreased by 40.389%, 40.758% and 40.023% averagely at L1, L2, L5, respectively for GPS/QZSS;and 12.083%, 14.290% and 18.781% averagely at B1, B2, B3, respectively for BDS.