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   Function to be minimized by fmins for MinTOrbitInjection.
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   Form:
   y = FMinTOrbitInjection( x, d )
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   Inputs
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   x           (2,1)[x;y;vX;vY]
   d           (1,1) Data structure
                     .f1 (1,1) 2*altitude*height/final horizontal v^2
                     .f1 (1,1) acceleration/gravitational acceleration;

   -------
   Outputs
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   y           (1,1) Cost

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