Detection and Repair of BDS Triple-Frequency Cycle Slip in Strong Ionospheric Environment
In the strong ionospheric environment,cycle slip detection is affected by ionospheric delay and pseudorange multipath,which is easy to cause false detections.A cycle slip detection and repair method adapted to the strong ionospheric environment is pro-posed,and a suitable threshold of pseudo-range phase combination detection is selected.In this paper,triple-frequency GFIF phase combination,MW phase combination and ionospheric correction geometric free pseudo-range phase combination are used for cycle slip detection.In the repair stage,ionospheric correction pseudo-range phase combination and two MW combinations are used to repair the cycle slip,which solved the ill condition of simultaneous equations.The experimental results show that the proposed method can detect and repair cycle slips accurately in strong ionospheric environment by using JFNG and XMIS observation data on the day of the magnet-ic storm,and adding small cycle slips and random cycle slips within two weeks into the data.
strong ionosphericBDS triple-frequencycycle slip detection and repairionospheric correction
NETL
NSTL
万方数据
