  In this paper we present a study of the vertical haze and cloud structure
over a triple vortex in Saturn's atmosphere in the planetographic latitude
range 55N-69N (del Rio- Gaztelurrutia et al. , 2018) using HST/WFC3
multispectral imaging. The observations were taken during 29-30 June and 1 July
2015 at ten different filters covering spectral range from the 225 nm to 937
nm, including the deep methane band at 889 nm. Absolute reflectivity
measurements of this region at all wavelengths and under a number of
illumination and observation geometries are fitted with the values produced by
a radiative transfer model. Most of the reflectivity variations in this
wavelength range can be attributed to changes in the tropospheric haze. The
anticyclones are optically thicker ($\tau \sim$ 25 vs $\sim$ 10), more
vertically extended ($\sim$ 3 gas scale heights vs $\sim$ 2) and their bases
are located deeper in the atmosphere (550 mbar vs 500 mbar) than the cyclone.
