CONAN.utils.sesinw_secosw_to_ecc_omega
======================================

.. py:function:: CONAN.utils.sesinw_secosw_to_ecc_omega(sesinw, secosw, angle_unit='radians')

   Convert sesinw and secosw to eccentricity and argument of periastron in angle_unit

   :param sesinw: sqrt(ecc)*sin(omega)
   :type sesinw: array-like
   :param secosw: sqrt(ecc)*cos(omega)
   :type secosw: array-like
   :param angle_unit: unit in which to return the argument of periastron. one of ["radians", "degrees"].
                      Default is "radians"
   :type angle_unit: str

   :returns: * **ecc** (*array-like*) -- eccentricity
             * **omega** (*array-like*) -- argument of periastron in angle_unit