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Chapter 11. Typical On-board Systems

      batteries
      photovoltaics
      solar panels
      fuel cells
      RTGs



      only within about 1 AU from the sun
      using photovoltaics
      as alternating current
      only when in sunlight
      more efficiently when hot



      with no moving parts
      by atomic fission
      from the heat of radioactive decay
      by atomic fusion
      using thermocouples
      using photovoltaics



      to integrate all other subsystems.
      provide for activities such as deployments.
      physically support the other subsystems.
      provide mechanical attach points for transportation.



      to make the spacecraft lighter.
      to pressurize fuel tanks.
      to pressurize oxidizer tanks.
      as an emergency propellant.



      maintain a sterile spacecraft environment.
      passively maintain spacecraft temperature.
      protect against micro-meteoroid impacts.
      prevent fire.






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SECTION I  
ENVIRONMENT
1 The Solar System
2 Reference Systems
3 Gravity & Mechanics
4 Trajectories
5 Planetary Orbits
6 Electromagnetics

SECTION II
FLIGHT PROJECTS
7 Mission Inception
8 Experiments
9 S/C Classification
10 Telecommunications
11 Onboard Systems
12 Science Instruments
13 Navigation

SECTION III
FLIGHT OPERATIONS
14 Launch
15 Cruise
16 Encounter
17 Extended Operations
18 Deep Space Network