The JSC Mars-1 sample consists of weathered volcanic ash from the Pu'u Nene cinder cone on the Island of Hawaii (USA). The sample was processed at the Instituto de Cerámica y Vidrio (CSIC-ICV) to produce a narrow particle size distribution of 20-40 micrometers.
20-40 micrometer narrow size distribution measured at the CSIC-IAA.
The imaginary parts of the refractive indices, k, we derived for the JSC Mars-1 sample by using the model framework presented in Martikainen et al. 2023, ApJS, with GRS2 particle shapes.
The real part of the refractive index, n, was fixed to 1.5.
The uncertainties were computed by assuming a maximum error of 15% in the measured reflectance over the 200 to 2000 nm wavelength range.
Martikainen J, Muñoz O, Jardiel T, Gómez Martín JC, Peiteado M, Willame Y, Penttilä A, Muinonen K, Wurm G, Becker T. Optical constants of Martian dust analogs at UV-VIS-NIR wavelengths. ApJS 2023, in press.