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Heliosync orbit suggests focus on visual Earth observation and surveillance type missions.

• garmaine 7y ago
  I think you are thinking of geosync?
  • wmf 7y ago
    No. Geosynchronous orbits are so far away that cameras can't see much detail. Sun-synchronous low earth orbits are much closer and they always pass over the light side of the planet allowing for consistent observation.
    • garmaine 7y ago
      Ah I misread and was thinking this was heliocentric orbits.