Re: More GEO questions II

From: Patrick McNally (
Date: Fri Oct 12 2001 - 14:53:53 EDT

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    Note that G varies with the square of distance.
    26,000/4,000 = 6.5
    6.5*6.5= 42.25
    G at synchonous altitude is 2.3% of 32.2 ft/sec/sec
    A satellite is always falling.  As it moves sideways it keeps missing the 
    earth.  Above synchonous altitude, a satellite will be moving backward 
    compared with the earth.
    Pat McNally
    47.66 -122.32
    >A couple more GEO questions:
    >I made a spreadsheet out of the formulas provided by you all (thank you) 
    >played with the altitudes.
    >Obviously for a satellite to be geostationary it's speed decreases as it's
    >altitude decreases, which will cause crash and burn at altitudes less than
    >22,300 miles (13640km).
    >It was Arthur C. Clark who figured out the GEO altitude wasn't it?  How did
    >he do it?
    >My spreadsheet tells me at an altitude of 60,000 miles (37200km) a 
    >needs to cruise at 16,745 mph (10382kph) to remain geostationary. What 
    >happen to this orbit?  Is it possible to remain geostationary out there?  I
    >realize it would be very inefficient, but is it possible?
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