def loop_gain(reference_range, reference_rcs, reference_snr):
    """
    Calculate the loop gain given the reference range information.
    :param reference_range: Reference range for the radar (m).
    :param reference_rcs: Reference radar cross section for the radar (m^2).
    :param reference_snr: Reference signal to noise ratio for the radar.
    :return: The loop gain for the radar.
    """
    return reference_range ** 4 * reference_snr / reference_rcs