def calculate_air_density(air_temperature, atmospheric_pressure):
    """
    Calculates the air density [kg/m3].

    :param air_temperature:
        Air temperature [°C].
    :type air_temperature: float

    :param atmospheric_pressure:
        Atmospheric pressure [kPa].
    :type atmospheric_pressure: float

    :return:
        Air density [kg/m3].
    :rtype: float
    """
    return 3.48 * atmospheric_pressure / (273.16 + air_temperature)
