From: schillin@spock.usc.edu   
      
   comsociscc@yahoo.co.uk (Reza) writes:   
      
   >Hello,   
   >Assume there is no plane change.  Simply it is required to put a   
   >satellite from its LEO orbit with inclination angle of zero into the   
   >final GEO orbit using a bielliptic transfer.  The satellite must go   
   >through the following orbits:   
      
   >Initial circular LEO orbit --> first elliptic transfer orbit --> first   
   >circular transfer orbit --> second elliptic transfer orbit --> the   
   >final circular orbit.   
      
   >It seems that the satellite requires four burns rather than three.   
   >Could someone please tell me whether the above order is right? Why we   
   >need three burns rather than four (as given in other postings)? Where   
   >the burns occur?   
      
      
   There is no "first circular transfer orbit".  You go directly from   
   your initial circular LEO orbit, to your first elliptic transfer orbit,   
   to your second elliptic transfer orbit, to your destination circular   
   orbit.   
      
   First burn is when your initial circular orbit is tangent to the   
   perigee of the first elliptic transfer orbit.  Second burn is when   
   the apogee of the first elliptic transfer orbit is tangent to the   
   apogee of the second elliptic transfer orbit.  Third burn is when   
   the perigee of the second elliptic transfer orbit is tangent to   
   the destination circular orbit.   
      
      
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