The company no longer runs a TV relay station, or schools (both primary and secondary levels), hospitals, and guesthouses at each of the islands where it operates.

CNN: Tin Time in Indonesia

But Cmdr Hadfield insisted his social media activities were secondary to his main functions at the space station.

BBC: Chris Hadfield: 'Space was too good not to share it'

Without being prescriptive it is expected that a typical station configuration will consist of a primary tide gauge, two under water pressure sensor (secondary tide gauge), data logger, DCP geostationary satellite transmitter, modem, battery backup, solar panel, cables, mountings.

UNESCO: EDUCATION