摘要
基于多普勒观测值,利用一自适应两阶段卡尔曼滤波器,得到载波相位观测值的估值,与实际载波相位观测值比较,顾及高采样率GPS载波相位观测值误差的时间相关性,获得白化的载波相位观测残差序列,用来探测单频GPS周跳并加以修复,该算法适用于高采样率的单频GPS数据。应用采样率为1 s的GPS动态数据测试表明,该算法在载体平稳和机动阶段,都能检测1周的周跳。
Using a two-stage adaptive filter with GPS Doppler measurments to estimate L1 carrier phase, and then the whitening residuals of L1 carrier phase can be obtained comparing it with the actual carrier phase measuments, and considering time correlation of high-rate GPS carrier phase measuments error. Finally, by using the whitening residuals the cycle slips in GPS single frequency carrier phase will be detected and repaired. The method is fit for high-rate single frequency GPS data. A test using 1 Hz dynamic GPS data reveals that it can detect very small cycle slips.
出处
《大地测量与地球动力学》
CSCD
北大核心
2009年第4期83-87,共5页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(40474007)
关键词
单频GPS
周跳探测
自适应滤波
多普勒观测值
载波相位
single frequency GPS
cycle slips detecting
adaptive filter
Doppler measurments
carrier phase
