3.1 Introduction3.2 Elements of Satellite System Architecture3.3 Satellite Missions3.4 Communications Satellites3.5 Radar Satellites3.6 Navigational Satellites3.7 Remote Sensing Satellites3.8 Architecture of Satellite Command and Control3.9 The Communications Payload Transponder3.10 Satellite Functional Requirements3.11 The Satellite Link Equation3.12 The Microwave Transmitter Block3.13 Rx Front-End Block3.14 Received Power in the Communications System's RF Link3.15 Additional Losses in the Satellite and Antenna3.16 Thermal Noise and the Antenna Noise Temperature3.17 The SNR Equation and Minimum Detectable Signal3.18 Power Flux Density, Saturation Flux Density and Dynamic Range3.19 Full-Duplex Operation and Passive Intermodulation3.20 Gain and Gain Variation3.21 Pointing Error3.22 Remaining Elements of Satellite System Architecture3.23 Orbits and Orbital Considerations3.24 Spacecraft Introduction3.25 Spacecraft Budgets (Mass, Power, Thermal)3.26 Orbital Mission Life and Launch Vehicle Considerations3.27 Environment Management (Thermal, Radiation)3.28 Spacecraft Structure (Acoustic/Dynamic)3.29 Satellite Positioning (Station Keeping)3.30 Satellite Positioning (Attitude Control)3.31 Power Subsystem3.32 Tracking, Telemetry, Command and MonitoringReferences