Triple-frequency Wide-lane Ambiguity Resolution Method of BDS between the Base Stations

Aiming at the triple-frequency of BDS,the principle of wide-lane defined method that solves network RTK(Real-Time Kinematic)wide-lane(or extra-wide-lane)ambiguity was elaborated,and the influences of different atmospheric delay and observation noises for wide-lane ambiguity resolution were analyzed.The analysis shows that when the atmospheric delay is less than 1m,(0,1,-1)combined ambiguity is minimal sensitivity to atmospheric error and observation noises.The success rate of single epoch ambiguity resolution is almost 100%.(1,4,-5)and(1,3,-4)combinations are suboptimal combination.the ambiguity resolution success rates are all higher than 90%.A set of network RTK long baseline solution indicated that the triple-frequency wide-lane defined method can accurately solve two wide lane ambiguities by single epoch.Then any wide-lane(or extra-wide-lane)combined ambiguity whose sum of the coefficients is zero can be gotten through integer combination.This lays the foundation for network RTK basic frequency ambiguity resolution.