Abstract:This paper compares the comprehensive noise of code-phase combination and phase integer, which considers ionospheric delay, choosing the minimum noise combination (1,-3,2) and the combination (4,-3,-2),in which the sum of coefficient is unequal to zero. It combines the combination of (0,1,-1) to detect and correct BDS triple-frequency cycle slip. Analysis with BDS triple-frequency data provided by IGMAS considers three differenced constellations, which validates the hypothesis that it is possible to detect and correct all kinds of undifferenced cycle slip in real time.