orbix.equations.phase
=====================

.. py:module:: orbix.equations.phase

.. autoapi-nested-parse::

   Exoplanet phase functions.



Functions
---------

.. autoapisummary::

   orbix.equations.phase.lambert_phase_exact
   orbix.equations.phase.lambert_phase_poly


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

.. py:function:: lambert_phase_exact(cosbeta, sinbeta)

   Exact Lambert phase function using an arccos and sqrt call.

   :param cosbeta: The cosine of the phase angle.
   :param sinbeta: The sine of the phase angle.

   :returns: The Lambert phase function value, clipped to be non-negative.


.. py:function:: lambert_phase_poly(c)

   Approximate the lambert phase function based on just the cos(beta) value.