Abstract:

A key issue of kinematic single epoch positioning is the correct resolution of ambiguity. We can improve the reliability of the single epoch ambiguity resolution by adding constraints. When the receiver moves along a road center line, we can calculate the approximate mileage by pseudorange differential positioning, then construct track constraints according to line design data of the mileage. Wide lane Ambiguity can be determined relatively easily because its wavelength is longer. Firstly, wide lane ambiguity is fixed by additional track constraints damped LAMBDA,then ambiguities of L1 and L2 are determined through additional track constraints again. Experimental results show that the proposed algorithm has a high resolution success rate.

Key words: track constraints, single epoch, kinematic positioning, wide-lane combination, ambiguity