利用抗差多项式拟合法探测修复GNSS周跳

摘要

多项式拟合法探测周跳的能力受载波相位观测值的观测误差和采样率的较大限制.将观测数据分成若干段处理,虽然对结果有所改善,但降低了工作效率.采用历元间求差与抗差估计相结合的方法对多项式进行改进.并通过GPS/GLONASS实测数据进行实验,结果表明,利用抗差多项式拟合探测修复周跳的结果更加稳定可靠.%The ability of polynomial fitting for detecting and correcting cycle slips is strongly affected by the errors of the carrier phase observations and the intervals of the observation data.The observation data being divided into several pieces will improve the results,however,the efficiency will be decreased.A method for combining epoch-differenced with robust estimation to improve the method of polynomial fitting is proposed.The numerical experiment is performed by using the real data of GPS/GLONASS.The results indicate that the method of robust polynomial fitting is more rigorous in theory and more powerful in practice for detecting and correcting cycle slips comparing with the normal polynomial fitting method.