GPS载波相位的周跳检测方法

讨论了GPS载波相位定位中出现的周跳问题及其解决途径,将其分为静态和动态两种情况。在静态环境下根据卫星运动的特点采用最小二乘拟合的方法来检测,在动态环境下利用卡尔曼滤波对载波相位残差进行统计检验,并结合双频相位电离层残差组合进行两级周跳检测,可以提高周跳的检测能力。利用实测的相位数据,上述方法均得到了验证。

Cycle Slip Detection in GPS Carrier Phase Observables

This paper discusses cycle slip problem and its solving method in two different cases.In static case,a 4-order polynominal is produced using least square method,and it is used to predict the next epoch phase observable to find out cycle slip.In kinematic case,Kalman filter method is used to perform statistic test with phase residual,if dual phase observables are provided,the ionospheric residual is produced to perform two step cycle slip detection,thus to enhance its capability.All the above methods are verified with field phase data.