Retrieval Of Optical Constants At Uv-Vis-Nir For Martian
Dust Analogues By Modelling Light Scattering.
J. Martikainen, J. C. GóMez Martı́N, O. MuñOz, Instituto De Astrofı́Sica De Andalucı́A, Csic, Granada, Spain
(Juliamar@Iaa.Es), T. Jardiel, M. Peiteado, Instituto De CeráMica Y Vidrio, Csic, Madrid, Spain, M. Wolff, Space
Science Institute, Boulder, Colorado, Usa, And The Roadmap Team.

Introduction
Particle Composition In Light-Scattering And Radiativetransfer Models Is Parameterized Through The Wavelengthdependent Optical Constants, I.E., The Complex Refractive
Indices (M = N + Ik). The Real Part Of The Complex Refractive Index, N, Describes The Ratio Of The Speed Of Light
In A Vacuum To The Phase Velocity Of Light In The Material,
Whereas The Imaginary Part, K, Describes The Absorption
Of Light Inside The Material.
Optical Constants Are Needed From Modelling Singleparticle Scattering Within The Atmospheric Dust To Simulating The Global Martian Climate. Reliable Complex
Refractive Indices Of Martian Dust Are Difficult To Find In
The Literature For The Wavelengths Used In The Simulations.
Previous Studies By Wolff Et Al. (2009) & (2010) Have
Obtained Optical Constants From Analysing The Observed
Dust Storm Spectra At 258-2900 Nm Region By Using Cylindrical Particle Shapes, However, These Values Could Not
Be Supported With Direct Laboratory Measurements.
In This Work, We Retrieve The Complex Refractive Indices Of Three Martian Dust Analogues At Uv-Vis-Nir