AccelToLoading:

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   Convert sail characteristic acceleration to loading.
   The loading is the sail mass per unit area, m/A.

   Since version 7.
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   Form:
   sigma = AccelToLoading( acc0 )
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   ------
   Inputs
   ------
   acc0         (1,n) Characteristic acceleration, m/s2

   -------
   Outputs
   -------
   sigma        (1,n)  Sail loading (kg/m2)

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   Reference: Colin R. McInnes, "Solar Sailing: Technology, Dynamics and Mission
              Applications", Springer Praxis, London, 1999, p. 14
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Children:

Common: Database/Constant