ClohessyWiltshire:

Path: Orbit/Glideslope

% A special formulation of the Clohessy-Wiltshire equations.
   Returns four Phi matrices which give the position and velocity as a
   function of time t when distance x along the orbit circumference 
   is not necessarily small:
        r(t) = Phi.rr*r0 + Phi.rv*v0;
        v(t) = Phi.vr*r0 + Phi.vv*v0;
   where v has been substituted for rDot for clarity. These matrices
   only apply to circular orbits.
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   Form:
   Phi = ClohessyWiltshire( w, t )
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   ------
   Inputs
   ------
   w                 (1)    Orbit rate (rad/sec)
   t                 (1)    Time from initial state [r0; v0] (sec)

   -------
   Outputs
   -------
   Phi               (:)    Propagation matrix structure
      .rr            (3,3)
      .rv            (3,3)
      .vr            (3,3)
      .vv            (3,3)

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 Reference: Hablani, Tapper, Bashian et al. "Guidance algorithms
            for Autonomous Rendezvous of Spacecraft with a Target
            Vehicle in Circular Orbit," 2001
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Children:

SC: BasicOrbit/OrbRate

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