BDS Signal-in-Space User Range Error Evaluation Considering Different Antenna Phase Center Offset Models

BDS precise orbit and precise clock products provided by IGS analysis centers may differ due to the use of different antenna phase center models, which has a great impact on the comparison between precise products and the use of precise products to evaluate the accuracy of the BDS signal-in-space user range error. In this paper, the influence of different antenna phase center correction models on the precise orbit and clock products is analyzed in depth by using the measured observation data. Based on this, the BDS signal-in-space user range error evaluation method is proposed considering different antenna phase center correction models. With the precise orbit and clock products provided by the Center for Orbit Determination in Europe (CODE), Deutsches GeoForschungs Zentrum(GFZ) and Wuhan University (WHU), we evaluate the broadcast orbit, broadcast clock and signal-in-space user range error. The results show that after considering the difference of the satellite antenna phase center correction model, the accuracy of the signal-in-space user range error evaluated by the BDS precise orbit and precise clock products provided by different analysis centers is basically the same. Geostationary orbit is better than 1.68 m, inclined geosynchronous orbit is better than 0.78 m, medium earth orbit is better than 0.66 m, which verifies the correctness of the evaluation method proposed in this paper.