boinor.twobody.thrust.change_a_inc
==================================

.. py:module:: boinor.twobody.thrust.change_a_inc


Functions
---------

.. autoapisummary::

   boinor.twobody.thrust.change_a_inc.change_a_inc


Module Contents
---------------

.. py:function:: change_a_inc(k, a_0, a_f, inc_0, inc_f, f)

   Change semimajor axis and inclination.
      Guidance law from the Edelbaum/Kéchichian theory, optimal transfer between circular inclined orbits
      (a_0, i_0) --> (a_f, i_f), ecc = 0.

   :param k: Gravitational parameter.
   :type k: ~astropy.units.quantity.Quantity
   :param a_0: Initial semimajor axis (km).
   :type a_0: ~astropy.units.quantity.Quantity
   :param a_f: Final semimajor axis (km).
   :type a_f: ~astropy.units.quantity.Quantity
   :param inc_0: Initial inclination (rad).
   :type inc_0: ~astropy.units.quantity.Quantity
   :param inc_f: Final inclination (rad).
   :type inc_f: ~astropy.units.quantity.Quantity
   :param f: Magnitude of constant acceleration (km / s**2).
   :type f: ~astropy.units.quantity.Quantity

   :returns: **a_d, delta_V, t_f**
   :rtype: tuple (function, ~astropy.units.quantity.Quantity, ~astropy.time.Time)

   .. rubric:: Notes

   Edelbaum theory :cite:p:`Edelbaum1961`, reformulated by :cite:t:`Kechichian1997`.