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Foreword | |
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Preface | |
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Introduction | |
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What is Spacecraft Formation Flying? | |
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Coordination Approaches | |
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Fuel-use Drivers | |
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Control of Spacecraft Formations | |
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Control Approaches | |
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Space Navigation and the Global Positioning System | |
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Formation Flying Missions | |
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Fundamental Astrodynamics | |
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Coordinate Systems | |
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The Keplerian Two-body Problem | |
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Solution of the Inertial Equations of Motion | |
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Nonsingular Orbital Elements | |
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Non-Keplerian Motion and Orbital Perturbations | |
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Averaging Theory | |
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The Basics of Analytical Mechanics, Optimization, Control and Estimation | |
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Lagrangian and Hamiltonian Mechanics | |
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The Delaunay Elements | |
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Canonical Transformations | |
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Brouwer Theory | |
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Constrained Static Optimization | |
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Control Lyapunov Functions | |
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Linear Quadratic Regulation | |
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Kalman Filtering | |
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The Unscented Kalman Filter | |
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Nonlinear Models of Relative Dynamics | |
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Equations of Relative Motion in the Unperturbed Case | |
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The Energy Matching Condition | |
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Impulsive Formation-keeping | |
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Another Outlook on Optimal Formation-keeping | |
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Circular Chief Orbit | |
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Lagrangian and Hamiltonian Derivations | |
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Equations of Relative Motion under the Influence of J<sub>2</sub> | |
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Linear Equations of Relative Motion | |
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The Clohessy-Wiltshire Equations | |
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Two-impulse Linear Rendezvous | |
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Lagrangian and Hamiltonian Derivations of the CW Equations | |
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Accommodating second-order nonlinearities | |
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Curvilinear vs. Cartesian Relative Coordinates | |
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Elliptic Reference Orbits | |
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Periodic Solutions to the TH Equations | |
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Modeling Relative Motion Using Orbital Elements | |
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General Solution to the Nonlinear Relative Motion Equations | |
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Bounds on Maximal and Minimal Distances | |
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Relative Motion Approximations with a Circular-Equatorial Reference Orbit | |
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Establishing the PCO Initial Conditions | |
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Hybrid Differential Equations with Non-linearity Compensation for Unperturbed Circular Orbits | |
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Modeling Perturbed Relative Motion Using Orbital Elements | |
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The Unit-Sphere Approach | |
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Relative Motion Description using Quaternions | |
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The Gim-Alfriend Geometric Method | |
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Averaged Relative Motion | |
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Linearized J2-Dirferential Equations for Circular Orbits | |
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Differential Equations from the Gim-Alfriend STM | |
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A Second-Order State Propagation Model | |
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Perturbation Mitigation | |
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Dynamic Constraints for J<sub>2</sub> Mitigation | |
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A Nonlinear Theory based on Orbital Elements | |
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Dynamic Model Error Effect Comparison | |
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Perturbed Fundamental Frequencies for Formations in Near-circular Orbits | |
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Selection of the PCO Initial Conditions for Near-Circular Orbits | |
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Matching the In-plane and Cross-track Fundamental Frequencies | |
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PCO Formation Maintenance based on the Modified CW Equations | |
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Fuel Minimization and Balancing | |
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Rotation-Translation Coupling | |
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Relative Dynamics | |
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Kinematically-Coupled Relative Spacecraft Motion Model | |
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Formation Control | |
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Continuous Control | |
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Discrete-time LQR Control | |
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Impulsive Control based on Gauss' Variational Equations | |
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Two-impulse Formation Reconfiguration for Circular Orbits | |
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Two-impulse-per-orbit Formation Maintenance | |
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Implementation of �� Commands | |
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Plan Implementation | |
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Impact on Autonomous Rendezvous and Docking | |
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Relative Measurements and Navigation | |
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Dynamical Modeling | |
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Measurement Update: Carrier-Phase Differential GPS | |
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Comparison of EKF and UKF for Relative Navigation | |
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High-Fidelity Formation Flying Simulation | |
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Simulation Controller Configuration | |
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Simulation Results | |
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Summary and Future Prospects | |
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Risk Reduction | |
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Fuel Requirements | |
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Mission Operations | |
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Appendices | |
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The Transformation Matrix &SIGMA;(t) | |
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The Transformation Matrix &SIGMA;(t) -1 | |
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The Matrix B(t) | |
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The State Transition Matrix for Relative Mean Elements | |
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Transformation from Mean to Osculating Elements | |
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Jacobian for Mean to Osculating Elements | |
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Small Eccentricity Theory | |
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Yan-Alfriend Nonlinear Theory Coefficients | |
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References | |
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Index | |