Determination of Geopotential Difference and Orthometric Height Difference Using GPS Common View

GPS common-view approach is currently a widely used technique in time transfer.We analyze the principle and model of GPS common-view method and present a method to gain geopotential difference and orthometric height difference using GPS common-view data based on gravity frequency shift.We choose the time difference series among four stations from BIPM Circular T data to carry out the experiment.Results show that due to accuracy limit of GPS CV,the mean difference and standard deviation between calculated value and theory value of the height difference are at the order of tens of meters.