CollisionDemoSimStruct:

Path: FormationFlying/Initialize

% ProjCircSimStruct with a new command list to run collision survey.
   Specifies two spacecraft and four orbits and initial drift is removed.
   The reconfiguration is first commanded with a small size which causes 
   it to be rejected, and then again with a larger size for which it is 
   approved. To just check the CollisionMonitor output set the duration 
   to 600 seconds.

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   Form:
   sim = CollisionDemoSimStruct(duration)
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   Inputs
   ------
   duration   (1)    Duration, seconds (optional)

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   Outputs
   -------
   sim        (.)    Simulation data structure to be input to DFFSimulation

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