Abstract The estimations of precise satellite clock difference with nondifference model and the epoch differential model were studied, and the characteristics of the two models were compared through analyzing the computing speed and precision. Test results show that the estimate based on zerodifferential model has high precision and high reliability, more observation information can be used, and the ambiguity fixing also can be realized,but it needs more unknown parameters, the computing speed is slow, and the high resultant precision needs a converging produce gradually. While with the epoch differential model, the estimate needs less unknown parameters, the efficiency of computation is high, and the precision doesn’t need the converging produce, but compared with nondifference model its precision is lower, and the initial value should be extracted from the navigation messages or obtained through other ways. The systematical biases caused in that way will be absorbed by the ambiguity and receiver’s clock error and it won’t influence the final positioning results.
He Mingxian ,Li Xingxing ,Li Pan et al. COMPARISON AND ANALYSIS OF ESTIMATIONS OF PRECISESATELLITE CLOCK ERROR BASED ON NON-DIFFERENCE MODEL AND EPOCH DIFFERENTIAL MODEL[J]. , 2011, 31(1): 95-99.
He Mingxian ,Li Xingxing ,Li Pan et al. COMPARISON AND ANALYSIS OF ESTIMATIONS OF PRECISESATELLITE CLOCK ERROR BASED ON NON-DIFFERENCE MODEL AND EPOCH DIFFERENTIAL MODEL[J]. jgg, 2011, 31(1): 95-99.
