rootbrowseIAC-17A6session 99. Orbit Determination and PropagationPapers1. Effects of Thermosphere Total Density Perturbations on LEO Orbits During Severe Conditions Using SLR Data and TLE data sets.2. Debris Shape Approximation using Ballistic Coefficient Estimation3. Dynamical evolution analysis of standard geostationary transfer orbits injected by Chinese launchers4. Bayesian filtering using directional statistics for space debris tracking problem5. A LED-based Technology to improve the orbit determination of LEO satellite6. Estimation of orbital parameters of broken-up objects from in-situ debris measurement7. Interacting Multiple Mode Estimation for Space Object Characterisation8. Dual Layer Hierarchical Mixture of Experts for Simultaneous Estimation of Size and Reflectivity of Space Objects9. Analysis of Adaptive Gauss Mixture Unscented Kalman Filter with Sparse Optical Observations for Orbit Determination10. Debris Object Orbit Initialization using the Probabilistic Admissible Region with Asynchronous Heterogeneous Observations11. Satellite Orbital Determination using the Desert Fireball Network