ECIToNED:

Path: AC/ACCoord

% Convert from the ECI frame to the NED frame.
--------------------------------------------------------------------------
   Form:
   b = ECIToNED( r, opt, f )
--------------------------------------------------------------------------

   ------
   Inputs
   ------
   r           (3,1) Position vector ECI
   opt         (1,:) 'matrix' or 'quaternion'
                       (default is matrix)
   f           (1,1) Flattening factor (optional)

   -------
   Outputs
   -------
   b           (3,3) Transformation matrix
               (4,1) Quaternion

--------------------------------------------------------------------------
   Reference: Stevens, B.L., Lewis, F.L., Aircraft Control and Simulation,
              John Wiley & Sons, 1992, p. 36.
--------------------------------------------------------------------------

Children:

Common: Quaternion/Mat2Q

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