Experimental scattering matrix for lunar regolith simulant JSC-1A at visible wavelengths
Edward J. Garboczi, Ann C. Chiaramonti Debay, Thomas V. Lafarge, O Munoz, J Escobar-Cerezo, D Guirado, JC Gomez-Martin, Jay Goguen, F Moreno
We present the experimental scattering matrix as a function of the scattering angle of the lunar soil simulant JSC-1A. The measurements were performed at 488 nm, 520 nm and 647 nm, covering the range of scattering angles from 3o to 177o. The size distribution of the sample was measured and SEM images taken to characterize the dust. The polarization color extracted from the measured degree of linear polarization for unpolarized incident light was used as a diagnostic tool to infer the composition of the dust. As multiple scattering calculations with polarization included require single scattering matrices in the whole scattering range (from 0o to 180o), we compute the corresponding synthetic scattering matrix through an extrapolation method, considering theoretical boundary conditions. From the extrapolated results, the asymmetry parameter g and the back-scattering linear depolarization factor L were computed.