rootbrowseIAC-21A6session 99. Orbit Determination and Propagation - SSTPapers1. Assessing accuracy of different atmospheric models through orbital predictions for near real time applications2. Investigating the impact of unmodelled solar events on satellite orbits through realistic simulation scenarios3. Autoencoder-Based Thermospheric Density Estimation Using GPS Tracking Data4. The 25-Year Guideline: A New Approach for Practice5. Space Domain Awareness Using Deep Continual Learning Sequence Predictors8. Orbital propagation challenges and solutions for SST fragmentation services9. Detection and characterisation of in-orbit fragmentations over short and long periods of time11. Resident space object orbit determination using a multireceiver radar system1006. Gauss-PSO Algorithm for Too Short Arc Initial Orbit Determination for Ground SPOT1007. A NEW ANGLE-ONLY INITIAL ORBIT DETERMINATION PROCEDURE OF SPACE-BASED SPACE DEBRIS SURVEILLANCE