Satellite bus

A satellite bus or spacecraft bus is a general model on which multiple-production satellite spacecraft are often based. The bus is the infrastructure of the spacecraft, usually providing locations for the payload (typically space experiments or instruments).

Communications satellite bus and payload module

Bus-derived satellites are opposed to one-off, or specially produced satellites. Bus-derived satellites are usually customized to customer requirements, for example with specialized sensors or transponders, in order to achieve a specific mission.[1][2][3][4]

They are commonly used for geosynchronous satellites, particularly communications satellites, but are also used in spacecraft which occupy lower orbits, occasionally including low Earth orbit missions.

Examples
Main article: Comparison of satellite buses

(only commercially available models)

Diagram of the James Webb Space Telescope's spacecraft bus. The solar panel is in green and the light purple flats are radiator shades.[5]

Some satellite bus examples include:

Components
Main article: Spacecraft ยง Subsystems

A bus typically consists of the following subsystems:[6]

gollark: I think it is significantly below 1 most places, which is something...
gollark: If you keep R *around* 1 but cannot get it lower - and since we can't really do total lockdowns I think that's the case in some places - you're not getting rid of it, just slowing down the whole thing.
gollark: That too.
gollark: Perhaps we are in the same time zone, or same country, or same constituency, or even same village, or same house, or same room.
gollark: It is 17:02:33 for me too!

See also

References
  1. "TU Delft: Spacecraft bus subsystems". Lr.tudelft.nl. Retrieved 2014-04-23.
  2. "Spacecraft Systems". Braeunig.us. Retrieved 2014-04-23.
  3. "The James Webb Space Telescope". Jwst.nasa.gov. Retrieved 2014-04-23.
  4. "Antrix Corporation Ltd - Satellites > Spacecraft Systems & Sub Systems". Antrix.gov.in. 2009-09-24. Retrieved 2014-04-23.
  5. "Status of the JWST Sunshield and Spacecraft" (PDF).
  6. Satellite Bus Subsystems Archived 2012-09-05 at the Wayback Machine, NEC, accessed 25 August 2012.
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