Abstract:In this paper, we determine SWARM satellite orbits using the reduced-dynamic method, and estimate the receiver antenna PCO and PCV models based on the carrier phase residuals to verify their influence on orbit determination accuracy. The results show that when using PCO information, the accuracy of orbit determination is obviously improved, and the radial, along-track and cross-track RMSs are improved by 47%, 48% and 66%, respectively. After correcting the PCV effect, the POD accuracies in three directions are improved to the mm level. The SLR RMS statistics show that, considering the PCO and PCV, the average RMS of SWARM is 2.29 cm, which is very close to the post-scientific orbit. Finally, after comparing different PCV models, we infer that the 5°×5° PCV grid model is suitable for SWARM satellite POD.