CONAN.utils.doppler_boosting_signal
===================================

.. py:function:: CONAN.utils.doppler_boosting_signal(phi, A_db=0)

   Calculate the Doppler boosting signal of a planet as a function of phase angle.
   The equation is given as F = A_db * sin(phi).
   see eq. 4 of Esteves+2013 (https://iopscience.iop.org/article/10.1088/0004-637X/772/1/51)

   :param phi: phase angle (2*pi*phase for circular orbit) or true anomaly+omega-pi/2 in radians.
   :type phi: array-like
   :param A_db: semi-amplitude of the Doppler boosting signal.
   :type A_db: float

   :returns: **F_db** -- Doppler boosting signal as a function of phase.
   :rtype: array-like