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Stationary satellite in high latitude

  1. Apr 2, 2009 #1
    Hi all,

    Is that possible that a stationary satellite be fixed to a location far from equator?
     
  2. jcsd
  3. Apr 2, 2009 #2

    mgb_phys

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    No ....
     
  4. Apr 14, 2009 #3
    ... stationary with respect to what? If you mean with respect to earth ... the only option would be one of the Lagrangian Points (L4 or L5) in the Sun-Earth system. There are also L4 and L5 points in the Earth-Moon system but they are not very stable due to gravitational influence of the sun.

    ... in a theory, considering only earth and your satellite, you would basically have to place it at a point where the Earth would exert NO gravitational pull (the satellite would have zero potential energy). Since F = G m1m2 / d^2 there is no point (apart from the center of the Earth) where F = 0, hence your satellite would impact the Earth eventually, no matter how far it was originally placed.
     
  5. Apr 14, 2009 #4

    mgb_phys

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    I think the poster means fixed over a point on Earth - as in geostationary.
    This is only possible over the equator

    I thought the poster might come back for a fuller explanation than just "no...." !
     
    Last edited: Apr 14, 2009
  6. Apr 14, 2009 #5

    Borek

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    If it is not very far from the equator necessary corrections are so small, that it can be doable. As far as I remember - before the advent of digital communication - additional satelites on almost geostationary orbits were considered a viable solution to the lack of the bandwidth problem. Amount of fuel necessary for constant orbit corrections was small enough that satellite could operate for years.
     
  7. Apr 14, 2009 #6
    Sorry for the misunderstanding. I just meant geostationary satellites, not something orbiting the sun.
     
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