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Publications

Astrodynamics & Space Robotics Laboratory

Journal Publications

  1. Ketzner, Ryan; and elgohary, Tarek A., “Fast Full-Fidelity Monte Carlo Conjunction Analysis using the Cross Entropy Method with Gaussian Mixture”, AIAA Journal of Guidance, Control, and Dynamics. (Submitted)
  2. Ketzner, Ryan; and Elgohary, Tarek A., “Volumetric sensor Coverage using Octrees for Satellite Constellation Design and Analysis”, AIAA Journal of Spacecraft and Rockets. (Under Review)
  3. Hippelheuser, James; and Elgohary, Tarek A., “Multi-Observer Framework for Cislunar Orbit Determination and Tracking via Angles-Only Measurements”, The Journal of the Astronautical Sciences. (Under Review)
  4. Sivasankar, Pughazenthi; Lewis Jr. Bennie G.; Probe, Austin B.; and Elgohary, Tarek A., “A Validation Framework for Orbit Uncertainty Propagation Techniques using Real Satellite Data”, Acta Astronautica. ICSSA 2022 Best Paper Award Invited Paper. (Under Review)
  5. Sivasankar, Pughazenthi; Probe, Austin B.; and Elgohary, Tarek A., “Orthogonal Probability Approximation for Relative Orbit Conjuction Analysis”, Digital Engineering and Digital Twin: Advances in Methods of Computational Modeling in Engineering Sciences, a Special Issue in Memory of Professor Satya Atluri.
  6. Seleit, Ahmed E.; and Elgohary, Tarek A., “A Shape Parameter Insensitive CRBFs-Collocation for Solving Nonlinear Optimal Control Problems”, Optimal Control Applications and Methods (2023), 45 (1),pp. 413 – 435.
  7. Wang, Xuechuan; Elgohary, Tarek A.; Zhang, Zhe; Tasif Tahsinul H.; Feng, Haoyang; and Atluri, Satya. “Rapid Numerical Solver for Astrodynamics via Adaptive Variational Iteration”, The Journal of Astronautical Sciences.
  8. Wang, Hao; Phillips III, James R.; Dove Adrienne R.; and Elgohary, Tarek A., “Investigating Electrostatic Effects on Charged Lunar Dust Transport via Discrete Element Modeling”, Advances in Space Research (2022), 70 (20), pp. 3231 – 3248.
  9. Tasif, Tahsinul H.; Hippelheuser, James; and Elgohary, Tarek A., “An Analytic Continuation Extended Kalman Filter Framework for Perturbed Orbit Estimation Using a Network of Space-Based Observers with Angles-Only Measurements”, Astrodynamics (2022), vol. 6, no. 2, pp. 161 – 187.
  10. Hippelheuser, James; and Elgohary, Tarek A., “Inertial Space-Based Orbit Estimation: A New Measurement Model for Multiple Observers”, Acta Astronautica (2021), vol. 181, pp. 717 – 732.
  11. Tasif, Tahsinul H.; and Elgohary, Tarek A., “An Adaptive Analytic Continuation Method for Computing the Perturbed Two-Body Problem State Transition Matrix”, The Journal of the Astronautical Sciences (2020).
  12. Wang, Hao; and Elgohary, Tarek A., “A Simple and Accurate Apoolo-Trained Neural Network Controller for Mars Atmospheric Entry”, International Journal of Aerospace Engineering (2020).
  13. Hernandez, Kevin, Elgohary, Tarek A., Turner, James D. and Junkins, John L., “A Novel Analytic Continuation Power Series Solution for the Perturbed Two-Body Problem”, Celestial Mechanics and Dynamical Astronomy (2019),  131 (10). (PDF Available)
  14. Atallah, Ahmed M., Woollands, Robyn M., Elgohary, Tarek A., and Junkins, John L., “Accuracy and Efficiency Comparison of Six Numerical Integrators for Propagating Perturbed Orbits”, The Journal of the Astronomical Sciences, (2019) (PDF Available)
  15. Kalmár-Nagy, Tamás, Csikja, Rudolf and Elgohary, Tarek A., “Nonlinear Analysis of a 2-DOF Piecewise Linear Aeroelastic System”, Nonlinear Dynamics (2016), vol. 85, no. 2, pp. 739-750, 2016. (PDF Available)
  16. Elgohary, Tarek A., Turner, James D., and Junkins, John L., “Analytic Transfer Functions for the Dynamics & Control of Flexible Rotating Spacecraft Performing Large Angle Maneuvers”, The Journal of the Astronautical Sciences (2015), vol. 62, no. 2, pp. 168-195, 2015. (PDF Available)
  17. Elgohary, Tarek A., Dong, Leiting, Junkins, John L. and Atluri, Satya N., “A Simple, Fast, and Accurate Time-Integrator for Strongly Nonlinear Dynamical Systems”, CMES: Computer Modeling in Engineering & Sciences (2014), vol. 100, no. 3, pp. 249-275, 2014. (PDF Available)
  18. Elgohary, Tarek A., Dong, Leiting, Junkins, John L. and Atluri, Satya N., “Time Domain Inverse Problems in Nonlinear Systems Using Collocation & Radial Basis Functions”, CMES: Computer Modeling in Engineering & Sciences (2014), vol. 100, no. 1, pp. 59-84, 2014. (PDF Available)
  19. Elgohary, Tarek A., Dong, Leiting, Junkins, John L. and Atluri, Satya N., “Solution of Post-Buckling & Limit Load Problems, Without Inverting the Tangent Stiffness Matrix & Without Using Arc-Length Methods”, CMES: Computer Modeling in Engineering & Sciences (2014), vol. 98, no. 6, pp. 543-563, 2014. (PDF Available)
  20. Turner, James D., and Elgohary, Tarek A., “A Simple Perturbation Algorithm for Inverting the Cartesian to Geodetic Transformation”, Mathematical Problems in Engineering, vol. 2013, Article ID 712729, 2013. (PDF Available)
  21. Turner, James D., and Elgohary, Tarek A., “Generalized Frequency Domain State-Space Models for Analyzing Flexible Rotating Spacecraft”, The Journal of the Astronautical Sciences vol. 59, no. 1-2, pp. 459-476, 2012. (PDF Available)
  22. Turner, James D., Elgohary, Tarek A., Maiji, Manoranjan and Junkins, John L., “High Accuracy Trajectory and Uncertainty Propagation Algorithm for Long-Term Asteroid Motion Prediction”, Adventures on the Interface of Mechanics and Control: K. Alfriend, M. Akella, J. Hurtado, and J. Turner, Tech Science Press, Duluth, Georgia, pp. 15-34. 2012. (PDF Available)

Conference Papers

  1. Quebedeaux, Hunter; and Elgohary, Tarek A., “Using Mamba for Modeling Dynamical Systems in a Limited Data Scenario”, Dynamic Data Driven Application Systems (DDDAS) International Conference, November 6 – 8, 2024, New Brunswick, NJ.
  2. Sivasankar, Pugazenthi; Quebedeaux, Hunter; and Elgohary, Tarek A., “Application of a state space based neural network model for Uncertainty Propagation in dynamical systems”, Dynamic Data driven Application Systems (DDDAS) International Conference, November 6 – 8, 2024, New Brunswick, NJ. Best Paper Award (1st Place).
  3. Ketzner, Ryan’ and elgohary Tarek A., “Fast Monte Carlo Conjuction Analysis using Importance Sampling and the Cross-Entropy Method”, AAS/AIAA Astrodynamics Specialist Conference, August 11 – 15 2024, Broomfield, CO.
  4. Hintz, Bethany A.; and Elgohary, Tarek A., “Adaptive Coer Scheme Methods Applied to Solving Optimal Control Problems in Space Flight Applications”, AAS/AIAA Astrodynamics Specialist Conference, August 11 – 15 2024, Broomfield, CO.
  5. Ketzner, Ryan; Ravindra, Vinay; and Elgohary, Tarek A., “Cell-Based Preprocessing Algorithm for Fast satellite Coverage Calculation:, IEEE Aerospace Conference, March 2 – 8, 2024, Big Sky, MT
  6. Jones, Laura; and Elgohary, Tarek A., “An Investigation of Transfer Learning for Guidance and Control of Mars Entry, Descent, and Landing Missions”, AAS GN&C Conference, February 1-7, 2024, Breckenridge, CO.
  7. Ketzner, Ryan; and Elgohary, Tarek A., “An Octree-Based Spatial Index for Space-Based Space Surveillance Coverage Volume Computation”, AIAA/AAS Space Flight Mechanics Meeting, AIAA SciTech Forum, January 9-12, 2024, Orlando, FL.
  8. Sivasankar, Pugazenthi; and Elgohary, Tarek A., “Cislunar Orbital Uncertainty Propagation through the application of Radial Basis Function Approximation”, AIAA/AAS Space Flight mechanics meeting, AIAA SciTech Forum, January 8 – 12, 2024, Orlando, FL.
  9. Quebedeaux, Hunter; and Elgohary, Tarek A., “Physics-Informed Neural Netwroks for Orbit Propagation in Astrodynamics Problems”, AAS/AIAA Astrodynamics Specialist Conference, August 12 – 17, 2023, Big Sky, MT.
  10. Sivasankar, Pugazenthi; and Elgohary, Tarek A., “Application of Radial basis Function Approximation for Orbit Uncertainty Propagation in Astrodynamics”, AAS/AIAA Astrodynamics Specialist Conference, August 12 – 17, 2023, Big Sky, MT.
  11. Hippelheuser, James E.; and Elgohary, Tarek A., “Advantages of using sigma point orbit estimation filtering via multiple space-based observers”, AAS/AIAA Astrodynamics Specialist Conference, August 12 – 17, 2023, Big Sky, MT.
  12. Quebedeaux, Hunter; Lewis Jr., Bennie G.; and Elgohary, Tarek A., “Parallelization Techniques for Quantifying Uncertainty Using Embedded Hardware”, AAS/AIAA Astrodynamics Specialist Conference, August 7 – 11, 2022, Charlotte, NC.
  13. Kelly, Bethany A.; Seleit, Ahmed E.; and Elgohary, Tarek A., “Radial Optimal Control Software (ROCS_: An adaptive Solver Based on Radial Basis Functions”, AAS/AIAA Astrodynamics Specialist Conference, August 7 – 11, 2022, Charlotte, NC.
  14. Hippelheuser, James E.; and Elgohary, Tarek A., “A Novel Approach for Initial Orbit Determination for Space-Based Observation Networks”, 3rd IAA Conference on Space Situational Awareness (ICSSA), April 4 – 7, 2022, Madrid, Spain.
  15. Sivasankar, Pugazhenthi; Lewis Jr. Bennie G.; Probe Austin B,; and Elgohary, Tarek A., “Validation of Orthogonal Probability Approximation for Space Situational Awareness Using Real Satellite Data”, 3rd IAA Conference on Space Situational Awareness (ICSSA), April 4 – 7, 2022, Madrid, Spain. Best Paper Aware (3rd Place).
  16. Tasif, Tahsinul Haque; and Elgohary, Tarek A., “A Computation Process for the Higher Order State Transition Tensors of the Gravity and Drag Perturbed Two-Body Problem using Adaptive Analytic Continuation Technique”, The International Conference on Computational and Experimental Engineering and Sciences (ICCES 2022), January 2022, Virtual.
  17. Ketzner, Ryan; Quebedeaux, Hunter; and Elgohary, Tarek A., “The Dynamic Coupling of Heterogeneous Robotic Stystems for Spacecraft Motion Emulation”, The International Conference on Computational and Experimental Engineering and Sciences (ICCES 2022), January 2022, Virtual.
  18. Hippelheuser, James; and Elgohary, Tarek A., “An Adapative, Non-Singular Measurement Model for Angles-Only Orbit Determination and Estimation”, AMOS: Advanced Maui Optical and Space Surveillance Technologies, September 2021, Virtual.
  19. Quebedeaux, Hunter; Ketzner, Ryan; Ozimek-Newman, Celeste; and Elgohary, Tarek A., “Dynamics of a 9-DOF Heterogeneous Robotic Platform for Spacecraft Motion Emulation”, AIAA Region II Student Conference, April 2021, Virtual. Best Team Award (2nd Place).
  20. Phillips III, James R.; Wang, Hao; Hillegass, Alexander; Esparza, Annelisa; Dove, Adrienne R.; and Elgohary, Tarek A., “Implementation of Charged Particle Behavior in Discrete Element Method (DEM) Simulations”, ASCE Earth and Space Conference, April 19 – 23, 2021, Virtual.
  21. tasif, Tahasinul H., Hippelheuser, James; and Elgohary, Tarek A., “Analytic Continuation Extended Kalman Filter Framework for Space-Based Inertial Orbit Estimation via a Network of Observers”, IAA Space Traffic management Conference, January 26 – 27, 2021, Virtual.
  22. Hippelheuse, James E. and Elgohary, Tarek A., “New Geometric Approach for Multi Node Space-Based Orbit Estimation”, 2nd IAA Conference on Space Situational Awareness (ICSSA), January 14 – 16, 2020, Washington, DC. Best Paper Award (3rd Place). (PDF Available)
  23. Tasif, Tahsinul H. and Elgohary, Tarek A., “An Adaptive Analytic Continuation Technique for the Computation of the Higher Order State Transition Tensors for the Perturbed Two-Body Problem”, AIAA/AAS Space Flight Mechanics Meeting, January 6 – 10, 2020, Orlando, FL. (PDF Available)
  24. Seleit, Ahmed E., Ketzner, Ryan, Quebedeaux, Hunter and Elgohary, Tarek A., “Rapid Orbit Motion Emulator (ROME): Kinematics”, AIAA/AAS Space Flight Mechanics Meeting, January 6 – 10, 2020, Orlando, FL. (PDF Available)
  25. Wang, Xuechuan, Elgohary, Tarek A. and Atluri, Satya N., “An Adaptive Local Variational Iteration Method for Orbit Propagation and Strongly Nonlinear Dynamical Systems”, AIAA/AAS Space Flight Mechanics Meeting, January 6 – 10, 2020, Orlando, FL. (PDF Available)
  26. Wang, Hao, Martin, Dillon, and Elgohary, Tarek A., “Neural Network Trained Controller for Atmospheric Entry in Mars Missions”, AAS/AIAA Space Flight Mechanics Meeting, January 13-17, 2019, Ka’anapali, Maui, HI. (PDF Available)
  27. Tasif, Tahinsul H., and Elgohary, Tarek A., “A High Order Analytic Continuation Technique for teh Perturbed Two-Body Problem State Transition Matrix”, AAS/AIAA Space Flight Mechanics Meeting, January 13-17, 2019, Ka’anapali, Maui, HI. (PDF Available)
  28. Probe, Austin B., Shelton, Christopher T., Elgohary, Tarek A. and Junkins, John L., “Orbital Probability of Collision Using Orthogonal Polynomial Approximations”, 1st IAA Conference on Space Situational Awareness, November 13-15, 2017, Orlando, FL. (PDF Available)
  29. Probe, Austin B., Elgohary, Tarek A. and Junkins, John L., “A New Method for Space Objects Probability of Collision”, AIAA/AAS Astrodynamics Specialist Conference. September 13-16, 2016, Long Beach, CA (PDF Available)
  30. Hernandez, Kevin, Elgohary, Tarek A., Turner, James D. and Junkins, John L., “Analytic Continuation Power Series Solution for the Two-Body Problem with Atmospheric Drag”, AAS/AIAA Space Flight Mechanics Meeting, February 14-18, 2016, Napa, CA. (PDF Available)
  31. Read, Julie L., Elgohary, Tarek A., Probe, Austin and Junkins, John L., “Monte Carlo Propogation Of Orbital Elements Using Modified Chebyshev Picard Iteration”, AAS/AIAA Space Flight Mechanics Meeting, February 14 – 18, 2016, Napa, CA. (PDF Available)
  32. Hernandez, Kevin, Read, Julie L., Elgohary, Tarek A., Turner, James D. and Junkins, John L., “Analytic Power Series Solutions for Two-body and J2–J6 Trajectories and State Transition Models”, Advances in Astronautical Sciences: AAS/AIAA Astrodynamics Specialist Conference, August 9-13, 2015, Vail, CO. (PDF Available)
  33. Elgohary, Tarek A., Junkins, John L. and Atluri, Satya N., “An RBF-Collocation Algorithm for Orbit Propagation”, Advances in Astronautical Sciences: 25th AAS/AIAA Space Flight Mechanics Meeting. January 11-15, 2015, Williamsburg, VA. (PDF Available)
  34. Elgohary, Tarek A., and Turner, James D., “Generalized Frequency Domain Solution for a Hybrid Rigid Hub Timoshenko Beam Rotating Aerospace Structure”, Proceedings of AIAA/AAS Astrodynamics Specialist Conference, August 4-7, 2014, San Diego, CA. (PDF Available)
  35. Elgohary, Tarek A., Turner, James D., and Junkins, John L., “Dynamics and controls of a generalized frequency domain model flexible rotating spacecraft”, Proceedings of AIAA 13th International Conference on Space Operations (SpaceOps 2014), May 5-9, 2014, Pasadena, CA. (PDF Available)
  36. Elgohary, Tarek A. and Turner, James D., “State Transition Tensor Models for the Uncertainty Propagation of the Two-Body Problem”, Advances in Astronautical Sciences (2014): AAS/AIAA Astrodynamics Conference. Vol. 150, pp. 1171-1194. (PDF Available)
  37. Elgohary, Tarek A. and Turner, James D., “A simple perturbation algorithm for inverting the Cartesian to Geodetic transformation”, Advances in Astronautical Science (2014): AAS/AIAA Astrodynamics Conference, vol. 150, pp. 303-314. (PDF Available)
  38. Elgohary, Tarek A. and Turner, James D., “Generalized frequency domain modeling and analysis for a flexible rotating spacecraft”, Proceeding of AIAA Modeling and Simulation Technologies Conference (MST 2013), August 19-22, 2013, Boston, MA. (PDF Available)
  39. Elgohary, Tarek A., Turner, James D., and Junkins, John L., “High-order analytic continuation and numerical stability analysis for the classical two-body problem”, Advances in Astronautical Sciences (2012): The Jer-Nan Juang Astrodynamics Symposium. Vol. 147, pp. 627-649. (PDF Available)
  40. Elgohary, Tarek A., and Kalmár-Nagy, Tamás, “Nonlinear Analysis of a 2-DOF Piecewise Linear Aeroelastic System”, Proceedings of ASME International Design Engineering Technical Conference (IDETC/CIE 2012), August 12-15, 2012, Chicago, IL. (PDF Available)
  41. Turner, James D. and Elgohary, Tarek A. “Generalized frequency domain state-space models for analyzing flexible rotating spacecraft”, Advances in Astronautical Sciences (2011): The Kyle T. Alfriend Astrodynamics Symposium, vol. 139, pp. 483-500. (PDF Available)