Precise orbit determination of JASON-2 satellite:analysis of GPS,SLR and DORIS

This paper studied the problem of precise orbit determination by using GPS,SLR and DORIS,and taken JASON-2 as example to discuss the determination strategy,orbit validating methods and orbit stacking of it.Experiment has been carried out by using the observational data from January 21st,2009 to January 25th,2009 and the results show that:the orbit determined by DORIS is the best among that determined by GPS,SLR and DORIS.Different orbit validating method came to a different conclusion on relative accuracy when comparing orbit determined by GPS and DORIS.When we combine the orbit determined by GPS,DORS and SLR respectively by using the weight based on result of SLR validating and orbit overlap,it shows that the combined orbit have similar accuracy.When comparing the combined orbit with JPL orbit,it shows that the radial orbit accuracy can reach to 2 centimeters.