Satellite-Induced Code Bias Variation Effects in BDS Time Transfer

Code bias variation is the intrnstic characterisc for BDS code observations. A comparison is presented on the code biasvariation in each type of BDS satellites. Later discussion on three kinds of code bias variation models, and application of three code bias variation models in three time links. The conclusions can be drawn: firstly, the code bias variation impact exists in the Common View results at a level of some tens of picoseconds; secondly, for short baselines(<200 km), CBV is negligable on the BDS CV results; thirdly, the correction of MEO code bias variation has large improvement in the BDS CV results; finally, the improvement precision increases with the increasing baseline.