Determination of Navigation Satellite Clock Bias Using SLR and Pseudorange Data

A new method for determining navigation satellite clock bias is presented by using SLR data and pseudoranges data. The bias of GPS 35 satellite clock is computed and predicted by using the data observed on October 2002. The results are compared with the GPS 35 clock bias of IGS. By comparison and analysis, the following facts can be drawn. 1. The precision of navigation satellite clock bias is better than 3 nanosecond, when the clock bias is calculated by using SLR data and pseudoranges data. There is no systematic error between our results and IGS's clock bias. 2. The precision of predicted clock bias has relations with the time span of computing the rate of satellite clock bias. The longer the time span, the lower the precision of satellite clock bias. 3. The new method can separate satellite orbit and clock bias, it is beneficial to researching satellite clock bias.