FFEccDZ:

--------------------------------------------------------------------------
   Compute the first derivative of z with respect to true anomaly.
   This is used by the FFEccZExt function.

   Since version 7.
--------------------------------------------------------------------------
   Form:
   dz = FFEccDZ( nu, e, D, dH );
--------------------------------------------------------------------------

   ------
   Inputs
   ------
   nu               (1)   True anomaly [rad]
   e                (1)   Eccentricity
   D               (6,1)  Integration constants computed from i.c.'s
   dH               (1)   Integration constant computed from H(nu0)=0

   -------
   Outputs
   -------
   dz               (1)   First derivative of z with respect to true anomaly

--------------------------------------------------------------------------
   References: Inalhan, Tillerson, How, "Relative Dynamics and Control of
   Spacecraft Formations in Eccentric Orbits", Journal of Guidance,
   Control & Dynamics, Vol.25, No.1, Jan-Feb 2002.
--------------------------------------------------------------------------
	  Copyright 2004 Princeton Satellite Systems, Inc.
   All rights reserved.
--------------------------------------------------------------------------

Children:

FormationFlying: EccDynamics/FFEccRMat