In order to solve the problem that the wavelength is long and the calculation process is relatively complex in the baseline solu-tion of multi-mode system,this paper proposes a baseline solution method for multi-mode system based on Beidou three-frequency constraint.In this method,the ambiguity of the ionosphere is calculated firstly for the medium and long baselines,and then the basic ambiguity is separa-ted from the combined ambiguity.By substituting the basic ambiguity of the Beidou three-frequency into the GPS for baseline solving,the cor-responding ambiguity of the GPS is obtained,and the solution result is substituted into the observation value equation.The improved approach enables the baseline solution to be completed in a shorter epoch while ensuring the quality of the solution.It has been verified that the pro-posed method can greatly shorten the baseline solution time and improve the solution quality while ensuring sufficient accuracy.
维普
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