Red lines and dot present (n,k) values from measurements at IR and visible wavelengths65. Our estimate based on the gas phase cross section is shown by the gray line. The dashed line presents the results when the kUV is fitted with a set of Gaussian curves and the solid black line presents the case of a 2,000 cm−1 blue-shift on kUV. The shaded cyan area present the wavelength range sensitive to haze retrieval from the Voyager observations37. The average k value within this range varies between 0.65 and 0.72 for the dashed and solid line cases, respectively.