Mission Geometry; Orbit and Constellation Design and Management: Spacecraft Orbit and Attitude SystemsMission Geometry: Orbit and Constellation Design and Management (OCDM) is the most complete treatment available for many elements of space mission design and astronautics. OCDM discusses both the similarities and differences between orbit and altitude systems in terms of hardware, algorithms, design, and processing requirements. With the demand for reduced cost and the introduction of extensive on board computing, what were once entirely separate