SatelliteSubsystemMass:

Path: SC/SystemDesign

% Create masses for a satellite.
   You pass in the subsystem name and the BOL spacecraft mass. The data
   is based on the Intelsat V satellite and other communications
   satellites.

   Subsystem                 param
   ---------                 -----
   'acs'
   'thermal'
   'propulsion insertion'    fuel mass
   'propulsion rcs'          life in years
   'structure'               
   'power'                   communications system power (W)
   'electrical integration'
   'mechanical integration'
   'payload'                 communications system power (W)

   As shown in the built-in demo, you need to iterate on the function as 
   you build up the satellite mass.

   Since version 10.
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   Form:
   m = SatelliteSubsystemMass( subsystem, mSc, param )
--------------------------------------------------------------------------

   ------
   Inputs
   ------
   subsystem (1,:) Subsystem name
   mSc       (1,1) Beginning of life mass (kg)
   param     (1,1) Insertion fuel mass, life in years or comm power

   -------
   Outputs
   -------
   m        (1,1) Mass (kg)

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   References:	Agrawal, B. ,"Design of Geosynchronous Spacecraft,"
               Prentice-Hall, 1986.
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