Positioning Method Design by Triple Difference and Taylor Series Expansion Techniques

摘要

In this research the relative positioning method based on carrier phase was studied. The position of receiver is obtained by using the triple differences of carrier phase for different times and different satellites, in which both the errors of satellite and receiver biases as well as ionosphere propagation delays were replaced by the first order power series approximation, and then solving the navigation equations by the recursive method to minimize the least-squared-error. This methodology was not studied in the past. By using the GPS simulator for positioning, one can see that the positioning accuracy is about centimeter level, so it can be used for the system of higher accuracy requirement.