def form_gains(epsilon):
    """
    Turn reflection coefficients into gains.

    Reflection gains are formed via g = 1 + eps
    where eps is the reflection coefficient
        eps = A exp(2j * pi * tau * freqs + 1j * phs)

    Args:
        epsilon : dictionary, ant-pol keys and ndarray values

    Returns:
        gains : dictionary, ant-pol keys and ndarray values
    """
    return dict([(k, 1 + epsilon[k]) for k in epsilon.keys()])