Triple-frequency improved kinematic-to-kinematic ambiguity resolution method based on BDS-3
Aiming at the problems of low fixing success ratio of the integer ambiguity under kinematic environment and the inability of geometry-free model to fully utilize the visible satellite observation information in the traditional three carrier ambiguity resolution(TCAR),the paper proposed a triple-frequency improved kinematic-to-kinematic ambiguity resolution method:based on the triple-frequency observations of BeiDou-3 global navigation satellite system(BDS-3),two sets of extra-wide-lane combined observations were selected,and their integer ambiguities were solved under the geometry-free model;then,the wide-lane ambiguities were obtained by linear combination;finally,using the constraints of the wide-lane distance,the narrow-lane ambiguities were solved under the geometry-based model,so as to restore the initial double-difference ambiguities.Experimental results showed that the method of obtaining the wide-lane ambiguity by using the linear combination of double extra-wide-lane could reduce the influence of the noise in the kinematic environment and significantly improve the fixing success ratio of wide-lane and narrow-lane ambiguity,the combination of the traditional TCAR with the geometry-based model could effectively improve the utilization ratio of the visible satellite observation information,and the fixing success ratio of narrow-lane ambiguity would reach more than 90%,and eventually realize the centimeter-level relative positioning.
BeiDou-3 global navigation satellite system(BDS-3)triple-frequency combinationdouble extra-wide-lanegeometry-based modelambiguity resolution
NETL
NSTL
万方数据
