Cover -- Title -- Copyright -- Table of Contents -- Preface -- Background -- Current Orbital Debris Environment -- Evolution of the Artificial Earth Satellite Environment -- Hypervelocity Impact and Upper-Stage Breakups -- Breakup Studies -- Preliminary Analysis of the Fragmentation of the Spot 1 Ariane Third Stage -- Explosive Fragmentation of Orbiting Propellant Tanks -- Characteristics of Satellite Breakups from Radar Cross Section and Plane-Change Angle -- Albedo Estimates for Debris -- Ariane-Related Debris in Deep-Space Orbit -- Potential Spot-1 R/B-Cosmos 1680 R/B Collision -- Control of Debris from Breakups -- Removal of Orbital Debris -- Cost Estimates for Removal of Orbital Debris -- Collision Probabilities in Geosynchronous Orbit and Techniques to Control the Environment -- Prevention of Breakups: Upper-Stage Operational Procedures -- Current Operational Practice for the Delta Second Stage -- Ariane Third Stage: Current Operational Practice and Modifications Expected -- Centaur Upper Stage -- Safing of H-1 Second Stage After Spacecraft Separation -- Author Index for Volume 121.