Satellite Hardware

This chapter takes a close look at what a typical satellite comprises, irrespective of its intended application, and discusses the different subsystems making up a typical satellite. It addresses issues like the major function performed by each one of these subsystems along with a brief consideration of their operational aspects. The satellite subsystems discussed are: mechanical structure, propulsion subsystem, thermal control subsystem, power supply subsystem, telemetry, tracking and command (TTC) subsystem, attitude and orbit control subsystem, payload subsystem, and antenna subsystem. Satellites operate in harsh environments and it is necessary that the onboard components are space qualified so that they perform their intended function with high reliability. The chapter also discusses the aspects of space qualification, and system reliability and redundancy designed to provide continued satellite operation.