Table of Contents: Preface Acknowledgments Ch. 1 Overview Ch. 2 Spacecraft Encounters Ch. 3 The Encounter Region Ch. 4 The Isotropic Problem Ch. 5 Analytical Expressions for Short-Term Encounters Ch. 6 International Space Station Collision Probability Ch. 7 Maneuvers to Mitigate Potential Collision Threats Ch. 8 Analytical Expressions for Long-Term Encounters Ch. 9 Short-Term vs Long-Term Spacecraft Encounters Ch. 10 Formation Flying Ch. 11 Maximum Probability of Collision Ch. 12 Close Encounters with Multiple Satellites Ch. 13 Instantaneous Probability of Collision Ch. 14 Spherical Error Probability Computation Ch. 15 Computer Programs Appendix A Novel Algorithm for Computing the Sun Vector Appendix B Enhanced Method of Computing Collision Probability Appendix C Derivation of Density Relations Appendix D Instantaneous Probability of Collision, Continued Index Supporting Materials