VarGausT:

Path: Orbit/OrbitMechanics

% Variational Keplerian equations with the acceleration in tangential coordinates.
   Computes the right hand side of the variational equations
   based on the Gauss formulation with the acceleration
   in tangential coordinates. These equations are singular
   when i = 0.

   Since version 1.
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   Form:
   dElDt = VarGausT( el, aD, tol, mu )
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   ------
   Inputs
   ------
   el                    Elements vector [a,i,W,w,e,M]
   aD                    Disturbance vector [tangent,normal,z]
   tol                   Tolerance for Kepler's equation solver
   mu                    Gravitational parameter

   -------
   Outputs
   -------
   dElDt                 Derivative to the elements

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   References: Battin, R.H., An Introduction to the Methods and Mathematics
               of Astrodynamics, AIAA, New York, 1987, pp. 484-490.
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Children:

SC: BasicOrbit/E2Nu
SC: BasicOrbit/M2EEl

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