"Version: 20190301"--Title page verso.Includes bibliographical references.1. Considerations on meteoroid entry physics. part I. Meteoroid and meteorite science. 2. The trajectory, structure and origin of the Chelyabinsk impactor -- 2.1. Trajectory -- 2.2. Structure -- 2.3. Origin -- 2.4. Implications3. Properties of meteoroids from forward scatter radio observations -- 3.1. Radio meteor theory …