SLR:

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   Computes the semi-latus rectum.

   Since version 1.
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   Form:
   p = SLR( e, a )
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   Inputs
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   e                     Eccentricity
   a                     Semi major axis (or perigee radius for parabola)

   -------
   Outputs
   -------
   p                     Semi-latus rectum

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

Common: Graphics/Mesh2