Analysis on the Impact of Error on Performance of Real-time Ambiguity Resolving of SBI

Under the condition of lunar orbit rendezvous and docking, the effect of error on the accuracy of real-time correct solution in the process of the real-time resolving cycle ambiguity of same beam interferometry is studied. First, the basic principles of resolving differential cycle ambiguity and differential phase delay of SBI is introduced. Combined with the experience of Japanese SELENE mission and China VLBI measurement experience, errors in the measurement process of VLBI are analyzed. Combined with simulation data and given signal frequency and the cycle ambiguity resolving method, analysis is focused on the effect of the error characteristics on the performances of real time resolving cycle ambiguity of SBI differential correlation phase. The simulation results indicate that, to ensure that the real-time resolving accuracy is up to 98%, phase system error of differential correlation in the observation process should be less than 3°, if the integration time is 60s, the standard deviation of the correlation phase the random error ã should be less than 10°.