1. Orbital Mechanics.- 1.1 Introduction.- 1.2 The Two-Body Problem.- 1.3 Orbital Elements and Reference Axes.- 1.4 Time in Orbit.- 1.5 Lambert’s Time of Flight Theorem.- 1.6 Orbital Manoeuvres.- 1.7 Patched Conies.- 1.8 Numerical Integration of Orbits.- 1.9 Software.- 2. The Launch Phase.- 2.1 Introduction.- 2.2 Propulsion.- 2.3 Launch Systems.- 2.4 Trajectory Dynamics.- 2.5 Computation of the Nominal Ascent Trajectory.- 2.6 A Computed Example: Ariane 4.- 2.7 Optimization of the Ascent.- 2.8 In-flight Guidance.- 2.9 The Guidance and Navigation System.- 2.10 Software.- 3. Earth Satellites: Perturbations and Manoeuvres.- 3.1 Introduction.- 3.2 Variation of the Orbital Elements.- 3.3 Gravitational Field of the Earth.- 3.4 Perturbations from the Sun and the Moon.- 3.5 Effect of Atmospheric Drag.- 3.6 Illustrative Computations of Perturbations.- 3.7 Correcting Low Earth Orbits.- 3.8 Geostationary Orbits.- 3.10 Software.- 4. Orbit Determination.- 4.1 Introduction.- 4.2 First Estimates of Orbits.- 4.3 Refinement of Orbits.- 4.4 Sequential Estimation.- 4.5 Software.- 5. Midcourse and Gravity Assist Manoeuvres.- 5.1 Introduction.- 5.2 Midcourse Manoeuvres.- 5.3 Gravity Assist Manoeuvres.- 5.4 Software.- 6. Low Thrust Missions.- 6.1 Introduction.- 6.2 Electric Propulsion.- 6.3 Optimization of Low Thrust Trajectories.- 6.4 Guidance on Low Thrust Trajectories.- 6.5 Software.- 7. Atmospheric Entry.- 7.1 Introduction.- 7.2 Flight Equations.- 7.3 Entry Corridors.- 7.4 Ballistic Entry with No Lift.- 7.5 Guided Entry using Lift.- 7.6 Software.- A. Appendices.- A.1 Perturbations from the Sun and Moon in Geostationary Orbit.- A.2 Perturbations due to Solar Pressure in Geostationary Orbit.- A.3 Angular Information from Doppler Tracking.- A.4 Ephemeris of the Sun.- A.5 Sequential UDCovariance Filter.- A.6 Global Positioning System.