rootbrowseIAC-20A6session 99. Orbit Determination and PropagationPapers3. Metric for object association in the Keplerian orbits space.4. Track-to-track association for space object cataloguing with optical survey data6. SHOOTING METHOD TO ALLOW FOR PERTURBATIONS IN THE OPTIMIZED BOUNDARY VALUE INITIAL ORBIT DETERMINATION7. Kalman filters and batch filters for orbit determination with TIRA8. Investigation and Prediction of Two-Line Element Errors for Objects in the Ionosphere10. Gram Charlier Series Sum Nonlinear Filter for Space Object Orbit Determination11. New Approaches to Accelerate Calculations of Orbital Dynamics12. Problems and A New Angle-only Initial Orbit Determination Procedure of Space-Based Space Debris Surveillance