VOrbit:

Path: SC/BasicOrbit

% Computes the orbital velocity.

   If you don't enter a, you will get v for a circular orbit.

   Either a or r can be scalars. It will plot v against whichever is a 
   vector.

   Since version 1.
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   Form:
   v = VOrbit( r, a, mu )
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   ------
   Inputs
   ------
   r             (1,:)   Radius
   a             (1,:)   Semi major axis (inf for parabola)
   mu            (1,1)   Gravitational parameter [default is Earth]

   -------
   Outputs
   -------
   v             (1,:)   Velocity

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   References:	Bates, R.B. Fundamentals of Astrodynamics, pp. 28,34.
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Children:

Common: Graphics/Plot2D

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