Inter-Satellite Link Network Real-Time Ring Dissemination Performance and Robustness

Inter-Satellite Link (ISL) technology in GNSS constellations improves Monitoring and Control (M&C), data dissemination, and accuracy of ODTS products. ISL-enabled networks can distribute data via Single (SH) or Multiple Hop (MH) routing logics: this work analyzes the performance and robustness of a MH RTR (Real-Time Ring) network both in nominal conditions and in the presence of ISL payloads failures (e.g., due to aging). The KPIs are assessed under no ground intervention upon failure detection and with ground-initiated mitigation actions like contact replanning and satellite isolation. Performance is measured by data dissemination time from generation to target satellites. Recommendations for improving network strategies and future work are discussed.