260263 Enhanced Publication | Appendix A, Appendix B, and Appendix C for the paper "Co-Frequency Interference Analysis and Dynamic Simulation Validation of Satellite-Direct-to-Device Systems Against Terrestrial IMT Networks in Cross-Border Scenarios"

The model is used to additionally characterize the shielding effect caused by rear-side supporting structures of the antenna. Three-dimensional radiation-pattern validation results are also provided for the satellite antenna and the base-station antenna after incorporating the back-lobe blocking effect. Open Content 2: Appendix B Detailed Mechanism Analysis of the Sensitivity TestsTaking Starlink-1 as an example, this appendix conducts sensitivity tests on key parameters, including the protection percentile, clutter-shielding probability, polarization reuse, number of co-channel beams, minimum service elevation, and link-establishment strategy.

A summary table of the main sensitivity-test results is provided. Auxiliary diagnostic metrics are further introduced to analyze in detail the mechanisms behind the nonlinear and even non-monotonic results caused by changes in some parameters. Open Content 3: Appendix C Impact of Back-Lobe Blocking Attenuation on the Protection Isolation DistanceTaking the Starlink-1 baseline scenario as an example, this appendix performs side-specific ablation and parameter-sensitivity analyses for the back-lobe blocking attenuation model introduced in Section 2.4.3 of the main text, and evaluates its impact on the protection isolation distances in the simulation results.

The results show that the back-lobe blocking correction mainly improves the engineering completeness of radiation-pattern modeling and does not change the overall conclusions of this paper regarding the protection isolation distances.